[maven-release-plugin] prepare release ebean-12.3.5

#2004 - MariaDb specific platform with @History support (initial)

pom.xml

@@ -9,7 +9,7 @@
 
   <groupId>io.ebean</groupId>
   <artifactId>ebean</artifactId>
-  <version>12.2.2</version>
+  <version>12.3.5</version>
   <packaging>jar</packaging>
 
   <name>ebean</name>
@@ -22,7 +22,7 @@
 
   <scm>
     <developerConnection>scm:git:git@github.com:ebean-orm/ebean.git</developerConnection>
-    <tag>ebean-12.2.2</tag>
+    <tag>ebean-12.3.5</tag>
   </scm>
 
   <profiles>
@@ -64,7 +64,7 @@
     <dependency>
       <groupId>io.avaje</groupId>
       <artifactId>config</artifactId>
-      <version>1.0</version>
+      <version>1.2</version>
     </dependency>
 
     <!--
@@ -87,7 +87,7 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-annotation</artifactId>
-      <version>6.11</version>
+      <version>6.12</version>
     </dependency>
 
     <dependency>
@@ -99,7 +99,7 @@
     <dependency>
       <groupId>io.ebean</groupId>
       <artifactId>ebean-datasource</artifactId>
-      <version>4.7.3</version>
+      <version>5.1</version>
     </dependency>
 
     <dependency>
@@ -200,7 +200,7 @@
     <dependency>
       <groupId>io.ebean.test</groupId>
       <artifactId>ebean-test-docker</artifactId>
-      <version>3.1.3</version>
+      <version>3.1.5</version>
       <scope>test</scope>
     </dependency>
 
@@ -248,6 +248,13 @@
       <scope>test</scope>
     </dependency>
 
+    <dependency>
+      <groupId>org.mariadb.jdbc</groupId>
+      <artifactId>mariadb-java-client</artifactId>
+      <version>2.6.0</version>
+      <scope>test</scope>
+    </dependency>
+
     <dependency>
       <groupId>com.sap.cloud.db.jdbc</groupId>
       <artifactId>ngdbc</artifactId>
@@ -292,7 +299,7 @@
       <plugin>
         <groupId>io.ebean</groupId>
         <artifactId>ebean-maven-plugin</artifactId>
-        <version>12.2.2</version>
+        <version>12.3.4</version>
         <executions>
           <execution>
             <id>test</id>
@@ -310,7 +317,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.22.1</version>
+        <version>3.0.0-M4</version>
         <configuration>
           <useSystemClassLoader>false</useSystemClassLoader>
           <trimStackTrace>false</trimStackTrace>

src/main/java/io/ebean/BackgroundExecutor.java

@@ -31,15 +31,18 @@ public interface BackgroundExecutor {
    * Execute a task periodically with a fixed delay between each execution.
    * <p>
    * For example, execute a runnable every minute.
-   * </p>
    * <p>
    * The delay is the time between executions no matter how long the task took.
    * That is, this method has the same behaviour characteristics as
    * {@link ScheduledExecutorService#scheduleWithFixedDelay(Runnable, long, long, TimeUnit)}
-   * </p>
    */
   void executePeriodically(Runnable r, long delay, TimeUnit unit);
 
+  /**
+   * Execute a task periodically additionally with an initial delay different from delay.
+   */
+  void executePeriodically(Runnable r, long initialDelay, long delay, TimeUnit unit);
+
   /**
    * Schedules a Runnable for one-shot action that becomes enabled after the given delay.
    *

src/main/java/io/ebean/DB.java

@@ -101,6 +101,22 @@ public class DB {
 //    return originalPrimaryServer;
 //  }
 
+  /**
+   * Return the ScriptRunner for the default database.
+   * <p>
+   * Useful to run SQL scripts that are resources. For example a test script
+   * for inserting seed data for a particular test.
+   *
+   * <pre>{@code
+   *
+   *   DB.script().run("/scripts/test-script.sql")
+   *
+   * }</pre>
+   */
+  public static ScriptRunner script() {
+    return getDefault().script();
+  }
+
   /**
    * Return the ExpressionFactory from the default database.
    * <p>

src/main/java/io/ebean/Ebean.java

@@ -24,7 +24,7 @@ import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
- * Ebean will be Deprecated - please migrate to use DB.
+ * Deprecated - please migrate to use <code>io.ebean.DB</code>.
  * <p>
  * Ebean is a registry of {@link Database} by name. Ebean has now been renamed to {@link DB}.
  * <p>
@@ -32,6 +32,7 @@ import java.util.concurrent.ConcurrentHashMap;
  * <p>
  * The preference is to use DB and Database rather than Ebean and EbeanServer.
  */
+@Deprecated
 public final class Ebean {
   private static final Logger logger = LoggerFactory.getLogger(Ebean.class);
 

src/main/java/io/ebean/EbeanServer.java

@@ -1,6 +1,7 @@
 package io.ebean;
 
 /**
+ * Deprecated - please migrate to <code>io.ebean.Database</code>.
  * Provides the API for fetching and saving beans to a particular Database.
  * <p>
  * Effectively this is an alias for {@link Database} which is now the new
@@ -8,6 +9,7 @@ package io.ebean;
  * <p>
  * The preference is to use DB and Database rather than Ebean and EbeanServer.
  */
+@Deprecated
 public interface EbeanServer extends Database {
 
 }

src/main/java/io/ebean/EbeanServerFactory.java

@@ -11,6 +11,8 @@ import java.util.Properties;
 import java.util.ServiceLoader;
 
 /**
+ * Deprecated - please migrate to DatabaseFactory.
+ * <p>
  * Creates EbeanServer instances.
  * <p>
  * This uses either a ServerConfig or properties in the ebean.properties file to
@@ -28,6 +30,7 @@ import java.util.ServiceLoader;
  * convenient way of using the 'default/primary' EbeanServer.
  * </p>
  */
+@Deprecated
 public class EbeanServerFactory {
 
 

src/main/java/io/ebean/ExpressionList.java

@@ -70,30 +70,40 @@ public interface ExpressionList<T> {
    */
   ExpressionList<T> order(String orderByClause);
 
+  /**
+   * Set the order by clause replacing the existing order by clause if there is
+   * one.
+   * <p>
+   * This follows SQL syntax using commas between each property with the
+   * optional asc and desc keywords representing ascending and descending order
+   * respectively.
+   */
+  ExpressionList<T> orderBy(String orderBy);
+
   /**
    * Return the OrderBy so that you can append an ascending or descending
    * property to the order by clause.
    * <p>
    * This will never return a null. If no order by clause exists then an 'empty'
    * OrderBy object is returned.
-   * </p>
+   * <p>
+   * This is the same as <code>orderBy()</code>
    */
   OrderBy<T> order();
 
   /**
-   * Deprecated migrate to order().
+   * Return the OrderBy so that you can append an ascending or descending
+   * property to the order by clause.
+   * <p>
+   * This will never return a null. If no order by clause exists then an 'empty'
+   * OrderBy object is returned.
+   * <p>
+   * This is the same as <code>order()</code>
    */
-  @Deprecated
   OrderBy<T> orderBy();
 
   /**
-   * Deprecated migrate to {@link #order(String)}
-   */
-  @Deprecated
-  Query<T> orderBy(String orderBy);
-
-  /**
-   * Deprecated migrate to {@link #order(String)}
+   * Deprecated migrate to {@link #orderBy(String)}
    */
   @Deprecated
   Query<T> setOrderBy(String orderBy);
@@ -1241,26 +1251,37 @@ public interface ExpressionList<T> {
   /**
    * Add raw expression with a single parameter.
    * <p>
-   * The raw expression should contain a single ? at the location of the
-   * parameter.
+   * The raw expression should contain a single ? or ?1
+   * at the location of the parameter.  We use ?1 when binding a
+   * collection for an IN expression.
    * </p>
-   * <p>
+   * <p>>
    * When properties in the clause are fully qualified as table-column names
    * then they are not translated. logical property name names (not fully
    * qualified) will still be translated to their physical name.
    * </p>
    * <p>
-   * <h4>Example:</h4>
+   * <h4>Examples:</h4>
    * <pre>{@code
    *
    *   // use a database function
    *   raw("add_days(orderDate, 10) < ?", someDate)
    *
+   *   raw("name like ?", "Rob%")
+   *
+   *   raw("name in (?1)", asList("Rob", "Fiona", "Jack"))
+   *
+   *   raw("name = any(?)", asList("Rob", "Fiona", "Jack"))
+   *
    * }</pre>
    *
-   * <h4>Subquery example:</h4>
+   * <h4>Subquery examples:</h4>
    * <pre>{@code
    *
+   *   // Bind collection using ?1
+   *   .raw("id in (select c.id from o_customer c where c.name in (?1))", asList("Rob", "Fiona", "Jack"))
+   *
+   *   // Using Postgres ANY expression
    *   .raw("t0.customer_id in (select customer_id from customer_group where group_id = any(?::uuid[]))", groupIds)
    *
    * }</pre>
@@ -1270,14 +1291,25 @@ public interface ExpressionList<T> {
   /**
    * Add raw expression with an array of parameters.
    * <p>
-   * The raw expression should contain the same number of ? as there are
-   * parameters.
-   * </p>
+   * The raw expression should contain the same number of ? or ?1, ?2 ... bind parameters
+   * as there are values. We use ?1, ?2 etc when binding a collection for an IN expression.
    * <p>
    * When properties in the clause are fully qualified as table-column names
    * then they are not translated. logical property name names (not fully
    * qualified) will still be translated to their physical name.
    * </p>
+   *
+   * <h4>Examples:</h4>
+   * <pre>{@code
+   *
+   *   raw("unitPrice > ? and product.id > ?", 2, 3)
+   *
+   *   raw("(status = ? or (orderDate < ? and shipDate is null) or customer.name like ?)",
+   *         Order.Status.APPROVED,
+   *         new Timestamp(System.currentTimeMillis()),
+   *         "Rob")
+   *
+   * }</pre></pre>
    */
   ExpressionList<T> raw(String raw, Object... values);
 

src/main/java/io/ebean/ExtendedServer.java

@@ -92,11 +92,9 @@ public interface ExtendedServer {
    * {@link #findEachWhile(Query, Predicate, Transaction)} is preferred
    * to findIterate(). The reason is that those methods automatically take care of
    * closing the queryIterator (and the underlying jdbc statement and resultSet).
-   * </p>
    * <p>
    * This is similar to findEach in that not all the result beans need to be held
    * in memory at the same time and as such is good for processing large queries.
-   * </p>
    *
    * @see Query#findIterate()
    * @see Query#findEach(Consumer)
@@ -106,7 +104,10 @@ public interface ExtendedServer {
   <T> QueryIterator<T> findIterate(Query<T> query, Transaction transaction);
 
   /**
-   * Return the query result as a Stream using a single persistence context.
+   * Execute the query returning the result as a Stream.
+   * <p>
+   * Note that this can support very large queries iterating any number of results.
+   * To do so internally it can use multiple persistence contexts.
    * <p>
    * Note that the stream needs to be closed so use with try with resources.
    * </p>
@@ -115,12 +116,17 @@ public interface ExtendedServer {
   <T> Stream<T> findStream(Query<T> query, Transaction transaction);
 
   /**
-   * Return the query result as a Stream (with multiple persistence contexts).
+   * Deprecated - migrate to findStream().
+   * <p>
+   * Execute the query returning the result as a Stream.
+   * <p>
+   * Note that this can support very large queries iterating any number of results.
+   * To do so internally it can use multiple persistence contexts.
    * <p>
    * Note that the stream needs to be closed so use with try with resources.
-   * </p>
    */
   @Nonnull
+  @Deprecated
   <T> Stream<T> findLargeStream(Query<T> query, Transaction transaction);
 
   /**

src/main/java/io/ebean/Query.java

@@ -711,9 +711,9 @@ public interface Query<T> {
   /**
    * Execute the query returning the result as a Stream.
    * <p>
-   * Note that this will hold all resulting beans in memory using a single
-   * persistence context. Use findLargeStream() for queries that expect to
-   * return a large number of results.
+   * Note that this can support very large queries iterating
+   * any number of results. To do so internally it can use
+   * multiple persistence contexts.
    * </p>
    * <pre>{@code
    *
@@ -731,6 +731,8 @@ public interface Query<T> {
   Stream<T> findStream();
 
   /**
+   * Deprecated - migrate to findStream.
+   * <p>
    * Execute the query returning the result as a Stream.
    * <p>
    * Note that this uses multiple persistence contexts such that we can use
@@ -749,6 +751,7 @@ public interface Query<T> {
    * }</pre>
    */
   @Nonnull
+  @Deprecated
   Stream<T> findLargeStream();
 
   /**
@@ -1352,9 +1355,13 @@ public interface Query<T> {
   Query<T> having(Expression addExpressionToHaving);
 
   /**
-   * Deprecated migrate to {@link #order(String)}
+   * Set the order by clause replacing the existing order by clause if there is
+   * one.
+   * <p>
+   * This follows SQL syntax using commas between each property with the
+   * optional asc and desc keywords representing ascending and descending order
+   * respectively.
    */
-  @Deprecated
   Query<T> orderBy(String orderByClause);
 
   /**
@@ -1373,13 +1380,20 @@ public interface Query<T> {
    * <p>
    * This will never return a null. If no order by clause exists then an 'empty'
    * OrderBy object is returned.
+   * <p>
+   * This is the same as <code>orderBy()</code>
    */
   OrderBy<T> order();
 
   /**
-   * Deprecated migrate to order().
+   * Return the OrderBy so that you can append an ascending or descending
+   * property to the order by clause.
+   * <p>
+   * This will never return a null. If no order by clause exists then an 'empty'
+   * OrderBy object is returned.
+   * <p>
+   * This is the same as <code>order()</code>
    */
-  @Deprecated
   OrderBy<T> orderBy();
 
   /**
@@ -1388,9 +1402,8 @@ public interface Query<T> {
   Query<T> setOrder(OrderBy<T> orderBy);
 
   /**
-   * Deprecated migrate to {@link #setOrder(OrderBy)}
+   * Set an OrderBy object to replace any existing OrderBy clause.
    */
-  @Deprecated
   Query<T> setOrderBy(OrderBy<T> orderBy);
 
   /**

src/main/java/io/ebean/SqlQuery.java

@@ -224,12 +224,49 @@ public interface SqlQuery extends Serializable {
    *
    * }</pre>
    *
+   * <p>
+   * When binding a collection of values into a IN expression we should use
+   * indexed parameters like ?1, ?2, ?3 etc rather than just ?.
+   * </p>
+   *
+   * <pre>{@code
+   *
+   *   String sql = "select c.id, c.name from customer c where c.name in (?1)";
+   *
+   *   List<SqlRow> rows = DB.sqlQuery(sql)
+   *       .setParameter(asList("Rob", "Fiona", "Jack"))
+   *       .findList();
+   *
+   *
+   *   List<SqlRow> rows = DB.sqlQuery(sql)
+   *       .setParameter(1, asList("Rob", "Fiona", "Jack"))
+   *       .findList();
+   * }</pre>
+   *
    * @param value The value to bind
    */
   SqlQuery setParameter(Object value);
 
   /**
    * Bind the parameter by its index position (1 based like JDBC).
+   * <p>
+   * When binding a collection of values into a IN expression we should use
+   * indexed parameters like ?1, ?2, ?3 etc rather than just ?.
+   * </p>
+   *
+   * <pre>{@code
+   *
+   *   String sql = "select c.id, c.name from customer c where c.name in (?1)";
+   *
+   *   List<SqlRow> rows = DB.sqlQuery(sql)
+   *       .setParameter(asList("Rob", "Fiona", "Jack"))
+   *       .findList();
+   *
+   *
+   *   List<SqlRow> rows = DB.sqlQuery(sql)
+   *       .setParameter(1, asList("Rob", "Fiona", "Jack"))
+   *       .findList();
+   * }</pre>
    */
   SqlQuery setParameter(int position, Object value);
 

src/main/java/io/ebean/SqlUpdate.java

@@ -5,18 +5,16 @@ package io.ebean;
  * <p>
  * Provides a simple way to execute raw SQL insert update or delete statements
  * without having to resort to JDBC.
- * </p>
  * <p>
  * Supports the use of positioned or named parameters and can automatically
  * notify Ebean of the table modified so that Ebean can maintain its cache.
- * </p>
  * <p>
  * Note that {@link #setAutoTableMod(boolean)} and
  * Ebean#externalModification(String, boolean, boolean, boolean)} can be to
  * notify Ebean of external changes and enable Ebean to maintain it's "L2"
  * server cache.
- * </p>
  *
+ * <h2>Positioned parameter example</h2>
  * <pre>{@code
  *
  *   // example using 'positioned' parameters
@@ -30,6 +28,7 @@ package io.ebean;
  *
  * }</pre>
  *
+ * <h2>Named parameter example</h2>
  * <pre>{@code
  *
  *   // example using 'named' parameters
@@ -45,8 +44,31 @@ package io.ebean;
  *   String msg = "There were " + rows + " rows updated";
  *
  * }</pre>
+ *
+ * <h2>Index parameter examples (e.g. ?1, ?2, ?3 ...)</h2>
  * <p>
- * <h3>Example: Using setNextParameter()</h3>
+ * We can use index parameters like ?1, ?2, ?3 etc when binding arrays/collections
+ * of values into an IN expression.
+ * </p>
+ * <pre>{@code
+ *
+ *   // Binding a list of 3 values (9991, 9992, 9993) into an IN expression
+ *
+ *   DB.sqlUpdate("delete from o_customer where name = ? and id in (?2)")
+ *     .setParameter(1, "Foo")
+ *     .setParameter(2, asList(9991, 9992, 9993))
+ *     .execute();
+ *
+ *   // note this effectively is the same as
+ *
+ *   DB.sqlUpdate("delete from o_customer where name = ? and id in (?2)")
+ *     .setParameter("Foo")
+ *     .setParameter(asList(9991, 9992, 9993))
+ *     .execute();
+ *
+ * }</pre>
+ *
+ * <h3>Example: Using setParameter()</h3>
  * <pre>{@code
  *
  *  String sql = "insert into audit_log (id, description, modified_description) values (?,?,?)";
@@ -56,19 +78,19 @@ package io.ebean;
  *  try (Transaction txn = DB.beginTransaction()) {
  *    txn.setBatchMode(true);
  *
- *    insert.setNextParameter(10000);
- *    insert.setNextParameter("hello");
- *    insert.setNextParameter("rob");
+ *    insert.setParameter(10000);
+ *    insert.setParameter("hello");
+ *    insert.setParameter("rob");
  *    insert.execute();
  *
- *    insert.setNextParameter(10001);
- *    insert.setNextParameter("goodbye");
- *    insert.setNextParameter("rob");
+ *    insert.setParameter(10001);
+ *    insert.setParameter("goodbye");
+ *    insert.setParameter("rob");
  *    insert.execute();
  *
- *    insert.setNextParameter(10002);
- *    insert.setNextParameter("chow");
- *    insert.setNextParameter("bob");
+ *    insert.setParameter(10002);
+ *    insert.setParameter("chow");
+ *    insert.setParameter("bob");
  *    insert.execute();
  *
  *    txn.commit();
@@ -81,19 +103,19 @@ package io.ebean;
  *
  *   try (Transaction txn = DB.beginTransaction()) {
  *
- *     insert.setNextParameter(10000);
- *     insert.setNextParameter("hello");
- *     insert.setNextParameter("rob");
+ *     insert.setParameter(10000);
+ *     insert.setParameter("hello");
+ *     insert.setParameter("rob");
  *     insert.addBatch();
  *
- *     insert.setNextParameter(10001);
- *     insert.setNextParameter("goodbye");
- *     insert.setNextParameter("rob");
+ *     insert.setParameter(10001);
+ *     insert.setParameter("goodbye");
+ *     insert.setParameter("rob");
  *     insert.addBatch();
  *
- *     insert.setNextParameter(10002);
- *     insert.setNextParameter("chow");
- *     insert.setNextParameter("bob");
+ *     insert.setParameter(10002);
+ *     insert.setParameter("chow");
+ *     insert.setParameter("bob");
  *     insert.addBatch();
  *
  *     int[] rows = insert.executeBatch();

src/main/java/io/ebean/bean/EntityBeanIntercept.java

@@ -36,10 +36,12 @@ public final class EntityBeanIntercept implements Serializable {
 
   private transient BeanLoader beanLoader;
 
-  private volatile transient PreGetterCallback preGetterCallback;
+  private transient PreGetterCallback preGetterCallback;
 
   private String ebeanServerName;
 
+  private boolean deletedFromCollection;
+
   /**
    * The actual entity bean that 'owns' this intercept.
    */
@@ -80,14 +82,14 @@ public final class EntityBeanIntercept implements Serializable {
   private static final byte FLAG_CHANGED_PROP = 2;
 
   /**
-   * Flags indicating if a property is a dirty embedded bean. Used to distingush
+   * Flags indicating if a property is a dirty embedded bean. Used to distinguish
    * between an embedded bean being completely overwritten and one of its
    * embedded properties being made dirty.
    */
   private static final byte FLAG_EMBEDDED_DIRTY = 4;
 
   /**
-   * Flags indicating if a property is a dirty embedded bean. Used to distingush
+   * Flags indicating if a property is a dirty embedded bean. Used to distinguish
    * between an embedded bean being completely overwritten and one of its
    * embedded properties being made dirty.
    */
@@ -369,13 +371,11 @@ public final class EntityBeanIntercept implements Serializable {
   /**
    * Set the loaded state to true.
    * <p>
-   * Calls to setter methods after the bean is loaded can result in 'Old Values'
-   * being created to support ConcurrencyMode.ALL
-   * </p>
+   * Calls to setter methods after the bean is loaded can result in
+   * 'Old Values' being created.
    * <p>
    * Worth noting that this is also set after a insert/update. By doing so it
    * 'resets' the bean for making further changes and saving again.
-   * </p>
    */
   public void setLoaded() {
     this.state = STATE_LOADED;
@@ -389,8 +389,7 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * When finished loading for lazy or refresh on an already partially populated
-   * bean.
+   * When finished loading for lazy or refresh on an already partially populated bean.
    */
   public void setLoadedLazy() {
     this.state = STATE_LOADED;
@@ -421,9 +420,6 @@ public final class EntityBeanIntercept implements Serializable {
 
   /**
    * Set true to turn off lazy loading.
-   * <p>
-   * Typically used to disable lazy loading on SQL based report beans.
-   * </p>
    */
   public void setDisableLazyLoad(boolean disableLazyLoad) {
     this.disableLazyLoad = disableLazyLoad;
@@ -443,7 +439,6 @@ public final class EntityBeanIntercept implements Serializable {
    * Return true if the embedded bean is new or dirty and hence needs saving.
    */
   public boolean isEmbeddedNewOrDirty(Object embeddedBean) {
-
     if (embeddedBean == null) {
       // if it was previously set then the owning bean would
       // have oldValues containing the previous embedded bean
@@ -451,7 +446,6 @@ public final class EntityBeanIntercept implements Serializable {
     }
     if (embeddedBean instanceof EntityBean) {
       return ((EntityBean) embeddedBean)._ebean_getIntercept().isNewOrDirty();
-
     } else {
       // non-enhanced so must assume it is new and needs to be saved
       return true;
@@ -469,8 +463,8 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * Finds the index position of a given property. Returns -1 if the property
-   * can not be found.
+   * Finds the index position of a given property. Returns -1 if the
+   * property can not be found.
    */
   public int findProperty(String propertyName) {
     String[] names = owner._ebean_getPropertyNames();
@@ -493,7 +487,7 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * Return the number of properties.s
+   * Return the number of properties.
    */
   public int getPropertyLength() {
     return owner._ebean_getPropertyNames().length;
@@ -515,8 +509,7 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * Set the property to be treated as unloaded. Used for properties initialised in default
-   * constructor.
+   * Set the property to be treated as unloaded. Used for properties initialised in default constructor.
    */
   public void setPropertyUnloaded(int propertyIndex) {
     flags[propertyIndex] &= ~FLAG_LOADED_PROP;
@@ -603,7 +596,6 @@ public final class EntityBeanIntercept implements Serializable {
    * For forced update on a 'New' bean set all the loaded properties to changed.
    */
   public void setNewBeanForUpdate() {
-
     for (int i = 0; i < flags.length; i++) {
       if ((flags[i] & FLAG_LOADED_PROP) != 0) {
         flags[i] |= FLAG_CHANGED_PROP;
@@ -658,8 +650,7 @@ public final class EntityBeanIntercept implements Serializable {
     for (int i = 0; i < len; i++) {
       if ((flags[i] & FLAG_CHANGED_PROP) != 0) {
         // the property has been changed on this bean
-        String propName = (prefix == null ? getProperty(i) : prefix + getProperty(i));
-        props.add(propName);
+        props.add((prefix == null ? getProperty(i) : prefix + getProperty(i)));
       } else if ((flags[i] & FLAG_EMBEDDED_DIRTY) != 0) {
         // an embedded property has been changed - recurse
         EntityBean embeddedBean = (EntityBean) owner._ebean_getField(i);
@@ -672,12 +663,10 @@ public final class EntityBeanIntercept implements Serializable {
    * Return true if any of the given property names are dirty.
    */
   public boolean hasDirtyProperty(Set<String> propertyNames) {
-
     String[] names = owner._ebean_getPropertyNames();
     int len = getPropertyLength();
     for (int i = 0; i < len; i++) {
       if ((flags[i] & FLAG_CHANGED_PROP) != 0) {
-        // the property has been changed on this bean
         if (propertyNames.contains(names[i])) {
           return true;
         }
@@ -710,10 +699,9 @@ public final class EntityBeanIntercept implements Serializable {
         String propName = (prefix == null ? getProperty(i) : prefix + getProperty(i));
         Object newVal = owner._ebean_getField(i);
         Object oldVal = getOrigValue(i);
-        if (!areEqual(oldVal, newVal)) {
+        if (notEqual(oldVal, newVal)) {
           dirtyValues.put(propName, new ValuePair(newVal, oldVal));
         }
-
       } else if ((flags[i] & FLAG_EMBEDDED_DIRTY) != 0) {
         // an embedded property has been changed - recurse
         EntityBean embeddedBean = (EntityBean) owner._ebean_getField(i);
@@ -732,10 +720,9 @@ public final class EntityBeanIntercept implements Serializable {
         // the property has been changed on this bean
         Object newVal = owner._ebean_getField(i);
         Object oldVal = getOrigValue(i);
-        if (!areEqual(oldVal, newVal)) {
+        if (notEqual(oldVal, newVal)) {
           visitor.visit(i, newVal, oldVal);
         }
-
       } else if ((flags[i] & FLAG_EMBEDDED_DIRTY) != 0) {
         // an embedded property has been changed - recurse
         EntityBean embeddedBean = (EntityBean) owner._ebean_getField(i);
@@ -756,7 +743,7 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * Add and return a dirty property hash recursing into embedded beans.
+   * Add and return a dirty property hash.
    */
   private void addDirtyPropertyKey(StringBuilder sb) {
     if (sortOrder > 0) {
@@ -816,21 +803,18 @@ public final class EntityBeanIntercept implements Serializable {
    * Load the bean when it is a reference.
    */
   protected void loadBean(int loadProperty) {
-
     synchronized (this) {
       if (beanLoader == null) {
         final Database database = DB.byName(ebeanServerName);
         if (database == null) {
           throw new PersistenceException("Database [" + ebeanServerName + "] was not found?");
         }
-
         // For stand alone reference bean or after deserialisation lazy load
         // using the ebeanServer. Synchronise only on the bean.
         loadBeanInternal(loadProperty, database.getPluginApi());
         return;
       }
     }
-
     synchronized (beanLoader) {
       // Lazy loading using LoadBeanContext which supports batch loading
       // Synchronise on the beanLoader (a 'node' of the LoadBeanContext 'tree')
@@ -842,32 +826,24 @@ public final class EntityBeanIntercept implements Serializable {
    * Invoke the lazy loading. This method is synchronised externally.
    */
   private void loadBeanInternal(int loadProperty, BeanLoader loader) {
-
     if ((flags[loadProperty] & FLAG_LOADED_PROP) != 0) {
       // race condition where multiple threads calling preGetter concurrently
       return;
     }
-
     if (lazyLoadFailure) {
       // failed when batch lazy loaded by another bean in the batch
       throw new EntityNotFoundException("(Lazy) loading failed on type:" + owner.getClass().getName() + " id:" + ownerId + " - Bean has been deleted");
     }
-
     if (lazyLoadProperty == -1) {
-
       lazyLoadProperty = loadProperty;
-
       if (nodeUsageCollector != null) {
         nodeUsageCollector.setLoadProperty(getProperty(lazyLoadProperty));
       }
-
       loader.loadBean(this);
-
       if (lazyLoadFailure) {
         // failed when lazy loading this bean
         throw new EntityNotFoundException("Lazy loading failed on type:" + owner.getClass().getName() + " id:" + ownerId + " - Bean has been deleted.");
       }
-
       // bean should be loaded and intercepting now. setLoaded() has
       // been called by the lazy loading mechanism
     }
@@ -877,32 +853,31 @@ public final class EntityBeanIntercept implements Serializable {
    * Helper method to check if two objects are equal.
    */
   @SuppressWarnings({"unchecked", "rawtypes"})
-  protected boolean areEqual(Object obj1, Object obj2) {
+  protected static boolean notEqual(Object obj1, Object obj2) {
     if (obj1 == null) {
-      return (obj2 == null);
+      return (obj2 != null);
     }
     if (obj2 == null) {
-      return false;
+      return true;
     }
     if (obj1 == obj2) {
-      return true;
+      return false;
     }
     if (obj1 instanceof BigDecimal) {
       // Use comparable for BigDecimal as equals
       // uses scale in comparison...
       if (obj2 instanceof BigDecimal) {
         Comparable com1 = (Comparable) obj1;
-        return (com1.compareTo(obj2) == 0);
-
+        return (com1.compareTo(obj2) != 0);
       } else {
-        return false;
+        return true;
       }
     }
     if (obj1 instanceof URL) {
       // use the string format to determine if dirty
-      return obj1.toString().equals(obj2.toString());
+      return !obj1.toString().equals(obj2.toString());
     }
-    return obj1.equals(obj2);
+    return !obj1.equals(obj2);
   }
 
   /**
@@ -913,6 +888,7 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   private void preGetterCallback(int propertyIndex) {
+    PreGetterCallback preGetterCallback = this.preGetterCallback;
     if (preGetterCallback != null) {
       preGetterCallback.preGetterTrigger(propertyIndex);
     }
@@ -942,25 +918,20 @@ public final class EntityBeanIntercept implements Serializable {
   }
 
   /**
-   * OneToMany and ManyToMany don't have any interception so just check for
-   * PropertyChangeSupport.
+   * OneToMany and ManyToMany only set loaded state.
    */
   public void preSetterMany(boolean interceptField, int propertyIndex, Object oldValue, Object newValue) {
-
     if (readOnly) {
       throw new IllegalStateException("This bean is readOnly");
     }
-
     setLoadedProperty(propertyIndex);
   }
 
   private void setChangedPropertyValue(int propertyIndex, boolean setDirtyState, Object origValue) {
-
     if (readOnly) {
       throw new IllegalStateException("This bean is readOnly");
     }
     setChangedProperty(propertyIndex);
-
     if (setDirtyState) {
       setOriginalValue(propertyIndex, origValue);
       setDirtyStatus();
@@ -985,10 +956,9 @@ public final class EntityBeanIntercept implements Serializable {
    * the old values for use with ConcurrencyMode.ALL.
    */
   public void preSetter(boolean intercept, int propertyIndex, Object oldValue, Object newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
-    } else if (!areEqual(oldValue, newValue)) {
+    } else if (notEqual(oldValue, newValue)) {
       setChangedPropertyValue(propertyIndex, intercept, oldValue);
     }
   }
@@ -998,7 +968,6 @@ public final class EntityBeanIntercept implements Serializable {
    * Check for primitive boolean.
    */
   public void preSetter(boolean intercept, int propertyIndex, boolean oldValue, boolean newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1010,7 +979,6 @@ public final class EntityBeanIntercept implements Serializable {
    * Check for primitive int.
    */
   public void preSetter(boolean intercept, int propertyIndex, int oldValue, int newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1022,7 +990,6 @@ public final class EntityBeanIntercept implements Serializable {
    * long.
    */
   public void preSetter(boolean intercept, int propertyIndex, long oldValue, long newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1034,7 +1001,6 @@ public final class EntityBeanIntercept implements Serializable {
    * double.
    */
   public void preSetter(boolean intercept, int propertyIndex, double oldValue, double newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (Double.compare(oldValue, newValue) != 0) {
@@ -1046,7 +1012,6 @@ public final class EntityBeanIntercept implements Serializable {
    * float.
    */
   public void preSetter(boolean intercept, int propertyIndex, float oldValue, float newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (Float.compare(oldValue, newValue) != 0) {
@@ -1058,7 +1023,6 @@ public final class EntityBeanIntercept implements Serializable {
    * short.
    */
   public void preSetter(boolean intercept, int propertyIndex, short oldValue, short newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1070,7 +1034,6 @@ public final class EntityBeanIntercept implements Serializable {
    * char.
    */
   public void preSetter(boolean intercept, int propertyIndex, char oldValue, char newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1082,7 +1045,6 @@ public final class EntityBeanIntercept implements Serializable {
    * byte.
    */
   public void preSetter(boolean intercept, int propertyIndex, byte oldValue, byte newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (oldValue != newValue) {
@@ -1094,7 +1056,6 @@ public final class EntityBeanIntercept implements Serializable {
    * char[].
    */
   public void preSetter(boolean intercept, int propertyIndex, char[] oldValue, char[] newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (!Arrays.equals(oldValue, newValue)) {
@@ -1106,7 +1067,6 @@ public final class EntityBeanIntercept implements Serializable {
    * byte[].
    */
   public void preSetter(boolean intercept, int propertyIndex, byte[] oldValue, byte[] newValue) {
-
     if (state == STATE_NEW) {
       setLoadedProperty(propertyIndex);
     } else if (!Arrays.equals(oldValue, newValue)) {
@@ -1137,6 +1097,17 @@ public final class EntityBeanIntercept implements Serializable {
     this.sortOrder = sortOrder;
   }
 
+  /**
+   * Set if the entity was deleted from a BeanCollection.
+   */
+  public void setDeletedFromCollection(final boolean deletedFromCollection) {
+    this.deletedFromCollection = deletedFromCollection;
+  }
+
+  public boolean isOrphanDelete() {
+    return deletedFromCollection && !isNew();
+  }
+
   /**
    * Set the load error that happened on this property.
    */

src/main/java/io/ebean/bean/PersistenceContext.java

@@ -61,6 +61,22 @@ public interface PersistenceContext {
    */
   int size(Class<?> rootType);
 
+  /**
+   * Return a copy of the Persistence context to use for large query iteration.
+   */
+  PersistenceContext forIterate();
+
+  /**
+   * Return a new Persistence context during iteration of large query result.
+   */
+  PersistenceContext forIterateReset();
+
+  /**
+   * Return true if the persistence context has grown and hit the 'reset limit'
+   * during large query iteration.
+   */
+  boolean resetLimit();
+
   /**
    * Wrapper on a bean to also indicate if a bean has been deleted.
    * <p>

src/main/java/io/ebean/common/ModifyHolder.java

@@ -1,5 +1,7 @@
 package io.ebean.common;
 
+import io.ebean.bean.EntityBean;
+
 import java.io.Serializable;
 import java.util.Collection;
 import java.util.LinkedHashSet;
@@ -54,6 +56,11 @@ class ModifyHolder<E> implements Serializable {
   void modifyAddition(E bean) {
     if (bean != null) {
       touched = true;
+
+      if (bean instanceof EntityBean) {
+        ((EntityBean) bean)._ebean_getIntercept().setDeletedFromCollection(false);
+      }
+
       // If it is to delete then just remove the deletion
       if (!undoDeletion(bean)) {
         // Insert
@@ -70,6 +77,11 @@ class ModifyHolder<E> implements Serializable {
   void modifyRemoval(Object bean) {
     if (bean != null) {
       touched = true;
+
+      if (bean instanceof EntityBean) {
+        ((EntityBean) bean)._ebean_getIntercept().setDeletedFromCollection(true);
+      }
+
       // If it is to be added then just remove the addition
       if (!undoAddition(bean)) {
         modifyDeletions.add((E) bean);

src/main/java/io/ebean/config/ModuleInfo.java

@@ -18,4 +18,9 @@ public @interface ModuleInfo {
    * The db name prefix is added to entity classes for non default databases.
    */
   String[] entities() default {};
+
+  /**
+   * Other classes like Attribute Converters.
+   */
+  String[] other() default {};
 }

src/main/java/io/ebean/config/ServerConfig.java

@@ -44,6 +44,8 @@ import java.util.Properties;
 import java.util.ServiceLoader;
 
 /**
+ * Deprecated - please migrate to <code>io.ebean.DatabaseConfig</code>.
+ *
  * The configuration used for creating a Database.
  * <p>
  * Used to programmatically construct a Database and optionally register it
@@ -80,6 +82,7 @@ import java.util.ServiceLoader;
  * @author rbygrave
  * @see DatabaseFactory
  */
+@Deprecated
 public class ServerConfig {
 
   /**
@@ -331,18 +334,6 @@ public class ServerConfig {
    */
   private ClassLoadConfig classLoadConfig = new ClassLoadConfig();
 
-  /**
-   * Set to true if the DataSource uses autoCommit.
-   * <p>
-   * Indicates that Ebean should use autoCommit friendly Transactions and TransactionManager.
-   */
-  private boolean autoCommitMode;
-
-  /**
-   * Set to true if transaction begin should be started with explicit statement.
-   */
-  private boolean explicitTransactionBeginMode;
-
   /**
    * The data source JNDI name if using a JNDI DataSource.
    */
@@ -475,6 +466,11 @@ public class ServerConfig {
 
   private String enabledL2Regions;
 
+  /**
+   * Set to true to effectively disable L2 cache plugins.
+   */
+  private boolean localOnlyL2Cache;
+
   /**
    * Should the javax.validation.constraints.NotNull enforce a notNull column in DB.
    * If set to false, use io.ebean.annotation.NotNull or Column(nullable=true).
@@ -1740,42 +1736,6 @@ public class ServerConfig {
     this.dataSourceJndiName = dataSourceJndiName;
   }
 
-  /**
-   * Return true if autoCommit mode is on. This indicates to Ebean to use autoCommit friendly Transactions and TransactionManager.
-   */
-  public boolean isAutoCommitMode() {
-    return autoCommitMode;
-  }
-
-  /**
-   * Set to true if autoCommit mode is on and Ebean should use autoCommit friendly Transactions and TransactionManager.
-   */
-  public void setAutoCommitMode(boolean autoCommitMode) {
-    this.autoCommitMode = autoCommitMode;
-  }
-
-  /**
-   * Return true if transaction begin should be started with explicit statement.
-   */
-  public boolean isExplicitTransactionBeginMode() {
-    return explicitTransactionBeginMode;
-  }
-
-  /**
-   * Set to true if transaction begin should be started with explicit statement.
-   * <p>
-   * This works for H2 and Postgres but not for Oracle - only use this if you first name
-   * is Daryl or you have explicitly talked to Rob about this feature.
-   * </p>
-   * <p>
-   * This is generally not expected to be turned on but instead allow transactions to start
-   * implicitly which is generally the standard approach.
-   * </p>
-   */
-  public void setExplicitTransactionBeginMode(boolean explicitTransactionBeginMode) {
-    this.explicitTransactionBeginMode = explicitTransactionBeginMode;
-  }
-
   /**
    * Return a value used to represent TRUE in the database.
    * <p>
@@ -2799,7 +2759,7 @@ public class ServerConfig {
    */
   protected void loadDataSourceSettings(PropertiesWrapper p) {
     dataSourceConfig.loadSettings(p.properties, name);
-    readOnlyDataSourceConfig.loadSettings(p.properties, name);
+    readOnlyDataSourceConfig.loadSettings(p.properties, name + "-ro");
   }
 
   /**
@@ -2860,10 +2820,9 @@ public class ServerConfig {
     collectQueryPlanThresholdMicros = p.getLong("collectQueryPlanThresholdMicros", collectQueryPlanThresholdMicros);
     docStoreOnly = p.getBoolean("docStoreOnly", docStoreOnly);
     disableL2Cache = p.getBoolean("disableL2Cache", disableL2Cache);
+    localOnlyL2Cache = p.getBoolean("localOnlyL2Cache", localOnlyL2Cache);
     enabledL2Regions = p.get("enabledL2Regions", enabledL2Regions);
     notifyL2CacheInForeground = p.getBoolean("notifyL2CacheInForeground", notifyL2CacheInForeground);
-    explicitTransactionBeginMode = p.getBoolean("explicitTransactionBeginMode", explicitTransactionBeginMode);
-    autoCommitMode = p.getBoolean("autoCommitMode", autoCommitMode);
     useJtaTransactionManager = p.getBoolean("useJtaTransactionManager", useJtaTransactionManager);
     useJavaxValidationNotNull = p.getBoolean("useJavaxValidationNotNull", useJavaxValidationNotNull);
     autoReadOnlyDataSource = p.getBoolean("autoReadOnlyDataSource", autoReadOnlyDataSource);
@@ -3100,6 +3059,20 @@ public class ServerConfig {
     this.disableL2Cache = disableL2Cache;
   }
 
+  /**
+   * Return true to use local only L2 cache. Effectively ignore l2 cache plugin like ebean-redis etc.
+   */
+  public boolean isLocalOnlyL2Cache() {
+    return localOnlyL2Cache;
+  }
+
+  /**
+   * Force the use of local only L2 cache. Effectively ignore l2 cache plugin like ebean-redis etc.
+   */
+  public void setLocalOnlyL2Cache(boolean localOnlyL2Cache) {
+    this.localOnlyL2Cache = localOnlyL2Cache;
+  }
+
   /**
    * Returns if we use javax.validation.constraints.NotNull
    */

src/main/java/io/ebean/config/dbplatform/AbstractDbEncrypt.java

@@ -43,11 +43,8 @@ public abstract class AbstractDbEncrypt implements DbEncrypt {
   public DbEncryptFunction getDbEncryptFunction(int jdbcType) {
     switch (jdbcType) {
       case Types.VARCHAR:
-        return varcharEncryptFunction;
       case Types.CLOB:
-        return varcharEncryptFunction;
       case Types.CHAR:
-        return varcharEncryptFunction;
       case Types.LONGVARCHAR:
         return varcharEncryptFunction;
 

src/main/java/io/ebean/config/dbplatform/DbEncrypt.java

@@ -7,30 +7,18 @@ package io.ebean.config.dbplatform;
  * As an alternative to using DB encryption you can encrypt/decrypt in java via
  * a special ScalarType but this has the limitation that you can't include that
  * property in query where clauses.
- * </p>
- *
- * @author rbygrave
  */
 public interface DbEncrypt {
 
-  // /**
-  // * Return the SQL for decrypting a column returning a VARCHAR.
-  // */
-  // String getDecryptSql(String columnWithTableAlias);
-  //
-  // /**
-  // * Return the DB function with bind variables used to encrypt a VARCHAR
-  // * value.
-  // */
-  // String getEncryptBindSql();
-
+  /**
+   * Return the DB encrypt function for the given JDBC type.
+   */
   DbEncryptFunction getDbEncryptFunction(int jdbcType);
 
   /**
    * Return the DB type that encrypted Strings are stored in.
    * <p>
    * This is VARCHAR for MySql and VARBINARY for most others.
-   * </p>
    */
   int getEncryptDbType();
 

src/main/java/io/ebean/config/dbplatform/mariadb/MariaDbHistorySupport.java

@@ -0,0 +1,38 @@
+package io.ebean.config.dbplatform.mariadb;
+
+import io.ebean.config.dbplatform.DbStandardHistorySupport;
+
+/**
+ * History support for MariaDB.
+ */
+public class MariaDbHistorySupport extends DbStandardHistorySupport {
+
+    /**
+     * Return the ' as of timestamp ?' clause appended after the table name.
+     */
+    @Override
+    public String getAsOfViewSuffix(String asOfViewSuffix) {
+        return " for system_time as of ?";
+    }
+
+    @Override
+    public String getVersionsBetweenSuffix(String asOfViewSuffix) {
+        return " for system_time between ? and ?";
+    }
+
+    /**
+     * Returns the SQL Server specific effective start column.
+     */
+    @Override
+    public String getSysPeriodLower(String tableAlias, String sysPeriod) {
+        return tableAlias + ".row_start";
+    }
+
+    /**
+     * Returns the SQL Server specific effective end column.
+     */
+    @Override
+    public String getSysPeriodUpper(String tableAlias, String sysPeriod) {
+        return tableAlias + ".row_end";
+    }
+}

src/main/java/io/ebean/config/dbplatform/mariadb/MariaDbPlatform.java

@@ -0,0 +1,16 @@
+package io.ebean.config.dbplatform.mariadb;
+
+import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.mysql.BaseMySqlPlatform;
+
+/**
+ * MariaDB platform.
+ */
+public class MariaDbPlatform extends BaseMySqlPlatform {
+
+  public MariaDbPlatform() {
+    super();
+    this.platform = Platform.MARIADB;
+    this.historySupport = new MariaDbHistorySupport();
+  }
+}

src/main/java/io/ebean/config/dbplatform/mysql/BaseMySqlPlatform.java

@@ -0,0 +1,68 @@
+package io.ebean.config.dbplatform.mysql;
+
+import io.ebean.Query;
+import io.ebean.config.dbplatform.DatabasePlatform;
+import io.ebean.config.dbplatform.DbPlatformType;
+import io.ebean.config.dbplatform.DbType;
+import io.ebean.config.dbplatform.IdType;
+import io.ebean.config.dbplatform.SqlErrorCodes;
+
+import java.sql.Types;
+
+/**
+ * Base platform for both MySql and MariaDB.
+ */
+public abstract class BaseMySqlPlatform extends DatabasePlatform {
+
+  public BaseMySqlPlatform() {
+    super();
+    this.useExtraTransactionOnIterateSecondaryQueries = true;
+    this.selectCountWithAlias = true;
+    this.supportsSavepointId = false;
+    this.inlineSqlUpdateLimit = true;
+    this.dbEncrypt = new MySqlDbEncrypt();
+    this.historySupport = new MySqlHistorySupport();
+    this.dbIdentity.setIdType(IdType.IDENTITY);
+    this.dbIdentity.setSupportsGetGeneratedKeys(true);
+    this.dbIdentity.setSupportsIdentity(true);
+    this.dbIdentity.setSupportsSequence(false);
+
+    this.dbDefaultValue.setNow("now(6)"); // must have same precision as TIMESTAMP
+    this.dbDefaultValue.setFalse("0");
+    this.dbDefaultValue.setTrue("1");
+
+
+    this.exceptionTranslator =
+      new SqlErrorCodes()
+        .addAcquireLock("1205")
+        .addDuplicateKey("1062", "1169")
+        .addDataIntegrity("630", "839", "840", "893", "1215", "1216", "1217", "1364", "1451", "1452", "1557")
+        .build();
+
+    this.openQuote = "`";
+    this.closeQuote = "`";
+    // use pipe for escaping as it depends if mysql runs in no_backslash_escapes or not.
+    this.likeClauseRaw = "like ? escape''";
+    this.likeClauseEscaped = "like ? escape'|'";
+
+    this.forwardOnlyHintOnFindIterate = true;
+    this.booleanDbType = Types.BIT;
+
+    dbTypeMap.put(DbType.BIT, new DbPlatformType("tinyint(1)"));
+    dbTypeMap.put(DbType.BOOLEAN, new DbPlatformType("tinyint(1)"));
+    dbTypeMap.put(DbType.TIMESTAMP, new DbPlatformType("datetime(6)"));
+    dbTypeMap.put(DbType.CLOB, new MySqlClob());
+    dbTypeMap.put(DbType.BLOB, new MySqlBlob());
+    dbTypeMap.put(DbType.BINARY, new DbPlatformType("binary", 255));
+    dbTypeMap.put(DbType.VARBINARY, new DbPlatformType("varbinary", 255));
+    dbTypeMap.put(DbType.JSON, new DbPlatformType("json", false));
+    dbTypeMap.put(DbType.JSONB, new DbPlatformType("json", false));
+  }
+
+  @Override
+  protected String withForUpdate(String sql, Query.ForUpdate forUpdateMode) {
+    // NOWAIT and SKIP LOCKED currently not supported with MySQL
+    return sql + " for update";
+  }
+
+}

src/main/java/io/ebean/config/dbplatform/mysql/MySql55Platform.java

@@ -4,7 +4,7 @@ import io.ebean.annotation.Platform;
 import io.ebean.config.dbplatform.DbPlatformType;
 import io.ebean.config.dbplatform.DbType;
 
-public class MySql55Platform extends MySqlPlatform {
+public class MySql55Platform extends BaseMySqlPlatform {
 
   public MySql55Platform() {
     super();

src/main/java/io/ebean/config/dbplatform/mysql/MySqlPlatform.java

@@ -1,77 +1,15 @@
 package io.ebean.config.dbplatform.mysql;
 
-import io.ebean.Query;
 import io.ebean.annotation.Platform;
-import io.ebean.config.dbplatform.DatabasePlatform;
-import io.ebean.config.dbplatform.DbPlatformType;
-import io.ebean.config.dbplatform.DbType;
-import io.ebean.config.dbplatform.IdType;
-import io.ebean.config.dbplatform.SqlErrorCodes;
-
-import java.sql.Types;
 
 /**
  * MySQL specific platform.
- * <p>
- * <ul>
- * <li>supportsGetGeneratedKeys = true</li>
- * <li>Uses LIMIT OFFSET clause</li>
- * <li>Uses ` for quoted identifiers</li>
- * </ul>
- * </p>
  */
-public class MySqlPlatform extends DatabasePlatform {
+public class MySqlPlatform extends BaseMySqlPlatform {
 
   public MySqlPlatform() {
     super();
     this.platform = Platform.MYSQL;
-    this.useExtraTransactionOnIterateSecondaryQueries = true;
-    this.selectCountWithAlias = true;
-    this.supportsSavepointId = false;
-    this.inlineSqlUpdateLimit = true;
-    this.dbEncrypt = new MySqlDbEncrypt();
-    this.historySupport = new MySqlHistorySupport();
-    this.dbIdentity.setIdType(IdType.IDENTITY);
-    this.dbIdentity.setSupportsGetGeneratedKeys(true);
-    this.dbIdentity.setSupportsIdentity(true);
-    this.dbIdentity.setSupportsSequence(false);
-
-    this.dbDefaultValue.setNow("now(6)"); // must have same precision as TIMESTAMP
-    this.dbDefaultValue.setFalse("0");
-    this.dbDefaultValue.setTrue("1");
-
-
-    this.exceptionTranslator =
-      new SqlErrorCodes()
-        .addAcquireLock("1205")
-        .addDuplicateKey("1062", "1169")
-        .addDataIntegrity("630", "839", "840", "893", "1215", "1216", "1217", "1364", "1451", "1452", "1557")
-        .build();
-
-    this.openQuote = "`";
-    this.closeQuote = "`";
-    // use pipe for escaping as it depends if mysql runs in no_backslash_escapes or not.
-    this.likeClauseRaw = "like ? escape''";
-    this.likeClauseEscaped = "like ? escape'|'";
-
-    this.forwardOnlyHintOnFindIterate = true;
-    this.booleanDbType = Types.BIT;
-
-    dbTypeMap.put(DbType.BIT, new DbPlatformType("tinyint(1)"));
-    dbTypeMap.put(DbType.BOOLEAN, new DbPlatformType("tinyint(1)"));
-    dbTypeMap.put(DbType.TIMESTAMP, new DbPlatformType("datetime(6)"));
-    dbTypeMap.put(DbType.CLOB, new MySqlClob());
-    dbTypeMap.put(DbType.BLOB, new MySqlBlob());
-    dbTypeMap.put(DbType.BINARY, new DbPlatformType("binary", 255));
-    dbTypeMap.put(DbType.VARBINARY, new DbPlatformType("varbinary", 255));
-    dbTypeMap.put(DbType.JSON, new DbPlatformType("json", false));
-    dbTypeMap.put(DbType.JSONB, new DbPlatformType("json", false));
-  }
-
-  @Override
-  protected String withForUpdate(String sql, Query.ForUpdate forUpdateMode) {
-    // NOWAIT and SKIP LOCKED currently not supported with MySQL
-    return sql + " for update";
   }
 
 }

src/main/java/io/ebean/config/dbplatform/oracle/Oracle11Platform.java

@@ -1,6 +1,7 @@
 package io.ebean.config.dbplatform.oracle;
 
 import io.ebean.annotation.Platform;
+import io.ebean.config.dbplatform.IdType;
 
 /**
  * Oracle 11 platform using rownum sql limiting.
@@ -12,5 +13,6 @@ public class Oracle11Platform extends OraclePlatform {
     this.platform = Platform.ORACLE11;
     this.columnAliasPrefix = "c";
     this.sqlLimiter = new OracleRownumSqlLimiter();
+    dbIdentity.setIdType(IdType.SEQUENCE);
   }
 }

src/main/java/io/ebean/config/dbplatform/oracle/OraclePlatform.java

@@ -30,7 +30,7 @@ public class OraclePlatform extends DatabasePlatform {
     this.basicSqlLimiter = new BasicSqlAnsiLimiter();
     this.historySupport = new OracleDbHistorySupport();
     this.truncateTable = "truncate table %s cascade";
-    dbIdentity.setIdType(IdType.SEQUENCE);
+    dbIdentity.setIdType(IdType.IDENTITY);
     dbIdentity.setSupportsSequence(true);
     dbIdentity.setSupportsIdentity(true);
     dbIdentity.setSupportsGetGeneratedKeys(true);

src/main/java/io/ebeaninternal/api/SpiEbeanServer.java

@@ -147,7 +147,7 @@ public interface SpiEbeanServer extends ExtendedServer, EbeanServer, BeanCollect
    *
    * @param tenantId For multi-tenant lazy loading provide the tenantId to use.
    */
-  SpiTransaction createQueryTransaction(Object tenantId);
+  SpiTransaction createReadOnlyTransaction(Object tenantId);
 
   /**
    * An event from another server in the cluster used to notify local

src/main/java/io/ebeaninternal/api/SpiQuery.java

@@ -458,7 +458,7 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
   /**
    * Set the query to be a delete query.
    */
-  void setupForDeleteOrUpdate(boolean deleteRequest);
+  void setupForDeleteOrUpdate();
 
   /**
    * Set the query to be delete by ids due to cascading delete.
@@ -788,7 +788,7 @@ public interface SpiQuery<T> extends Query<T>, TxnProfileEventCodes {
   /**
    * Set to true when we only include the Id property if it is explicitly included in the select().
    */
-  void setManualId(boolean manualId);
+  void setManualId();
 
   /**
    * Set default select clauses where none have been explicitly defined.

src/main/java/io/ebeaninternal/api/SpiTransaction.java

@@ -313,4 +313,9 @@ public interface SpiTransaction extends Transaction {
    * Return true when nested transactions should create Savepoints.
    */
   boolean isNestedUseSavepoint();
+
+  /**
+   * Return true if explicitly set to skip cache (ignores skipOnWrite).
+   */
+  boolean isSkipCacheExplicit();
 }

src/main/java/io/ebeaninternal/api/SpiTransactionProxy.java

@@ -158,6 +158,11 @@ public abstract class SpiTransactionProxy implements SpiTransaction {
     transaction.setSkipCache(skipCache);
   }
 
+  @Override
+  public boolean isSkipCacheExplicit() {
+    return transaction.isSkipCacheExplicit();
+  }
+
   @Override
   public boolean isSkipCache() {
     return transaction.isSkipCache();

src/main/java/io/ebeaninternal/dbmigration/DefaultDbMigration.java

@@ -15,6 +15,7 @@ import io.ebean.config.dbplatform.db2.DB2Platform;
 import io.ebean.config.dbplatform.h2.H2Platform;
 import io.ebean.config.dbplatform.hana.HanaPlatform;
 import io.ebean.config.dbplatform.hsqldb.HsqldbPlatform;
+import io.ebean.config.dbplatform.mariadb.MariaDbPlatform;
 import io.ebean.config.dbplatform.mysql.MySql55Platform;
 import io.ebean.config.dbplatform.mysql.MySqlPlatform;
 import io.ebean.config.dbplatform.nuodb.NuoDbPlatform;
@@ -820,6 +821,8 @@ public class DefaultDbMigration implements DbMigration {
         return new Postgres9Platform();
       case POSTGRES:
         return new PostgresPlatform();
+      case MARIADB:
+        return new MariaDbPlatform();
       case MYSQL55:
         return new MySql55Platform();
       case MYSQL:

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/BaseTableDdl.java

@@ -111,11 +111,9 @@ public class BaseTableDdl implements TableDdl {
       this.columnName = column.getName();
       this.defaultValue = platformDdl.convertDefaultValue(column.getDefaultValue());
       boolean alterNotNull = Boolean.TRUE.equals(column.isNotnull());
-
       if (column.getBefore().isEmpty() && alterNotNull && defaultValue == null) {
         handleStrictError(tableName, columnName);
       }
-
       before = getScriptsForPlatform(column.getBefore());
       after = getScriptsForPlatform(column.getAfter());
       this.withHistory = withHistory;
@@ -127,10 +125,8 @@ public class BaseTableDdl implements TableDdl {
     DdlMigrationHelp(AlterColumn alter) {
       this.tableName = alter.getTableName();
       this.columnName = alter.getColumnName();
-
       String tmp = alter.getDefaultValue() != null ? alter.getDefaultValue() : alter.getCurrentDefaultValue();
       this.defaultValue = platformDdl.convertDefaultValue(tmp);
-
       boolean alterNotNull = Boolean.TRUE.equals(alter.isNotnull());
       // here we add the platform's default update script
       withHistory = isTrue(alter.isWithHistory());
@@ -201,7 +197,6 @@ public class BaseTableDdl implements TableDdl {
     public String getDefaultValue() {
       return defaultValue;
     }
-
   }
 
   /**
@@ -241,7 +236,6 @@ public class BaseTableDdl implements TableDdl {
    */
   @Override
   public void generate(DdlWrite writer, CreateTable createTable) throws IOException {
-
     reset();
 
     String tableName = lowerTableName(createTable.getName());
@@ -275,7 +269,6 @@ public class BaseTableDdl implements TableDdl {
     if (platformDdl.isInlineForeignKeys()) {
       writeInlineForeignKeys(writer, createTable);
     }
-
     apply.newLine().append(")");
     addTableStorageEngine(apply, createTable);
     addTableCommentInline(apply, createTable);
@@ -285,9 +278,7 @@ public class BaseTableDdl implements TableDdl {
     apply.endOfStatement();
 
     addComments(apply, createTable);
-
     writeUniqueOneToOneConstraints(writer, createTable);
-
     if (isTrue(createTable.isWithHistory())) {
       // create history with rollback before the
       // associated drop table is written to rollback
@@ -305,7 +296,6 @@ public class BaseTableDdl implements TableDdl {
     // add blank line for a bit of whitespace between tables
     apply.end();
     writer.dropAll().end();
-
     if (!platformDdl.isInlineForeignKeys()) {
       writeAddForeignKeys(writer, createTable);
     }
@@ -324,7 +314,6 @@ public class BaseTableDdl implements TableDdl {
       if (hasValue(tableComment)) {
         platformDdl.addTableComment(apply, createTable.getName(), tableComment);
       }
-
       for (Column column : createTable.getColumn()) {
         if (!StringHelper.isNull(column.getComment())) {
           platformDdl.addColumnComment(apply, createTable.getName(), column.getName(), column.getComment());
@@ -427,7 +416,6 @@ public class BaseTableDdl implements TableDdl {
         writeForeignKey(write, createTable.getName(), column);
       }
     }
-
     writeAddCompoundForeignKeys(write, createTable);
   }
 
@@ -448,7 +436,6 @@ public class BaseTableDdl implements TableDdl {
       // no matching unique constraint so add the index
       fkeyBuffer.appendStatement(platformDdl.createIndex(new WriteCreateIndex(request.indexName(), tableName, request.cols(), false)));
     }
-
     alterTableAddForeignKey(write.getOptions(), fkeyBuffer, request);
     fkeyBuffer.end();
 
@@ -456,7 +443,6 @@ public class BaseTableDdl implements TableDdl {
     if (hasValue(request.indexName())) {
       write.dropAllForeignKeys().appendStatement(platformDdl.dropIndex(request.indexName(), tableName));
     }
-
     write.dropAllForeignKeys().end();
   }
 
@@ -513,9 +499,7 @@ public class BaseTableDdl implements TableDdl {
    * Write the unique constraints inline with the create table statement.
    */
   protected void writeUniqueConstraints(DdlBuffer apply, CreateTable createTable) throws IOException {
-
     boolean inlineUniqueWhenNullable = platformDdl.isInlineUniqueWhenNullable();
-
     List<Column> columns = new WriteUniqueConstraint(createTable.getColumn()).uniqueKeys();
     for (Column column : columns) {
       if (Boolean.TRUE.equals(column.isNotnull()) || inlineUniqueWhenNullable) {
@@ -532,12 +516,10 @@ public class BaseTableDdl implements TableDdl {
    * Write the unique constraint inline with the create table statement.
    */
   protected void inlineUniqueConstraintSingle(DdlBuffer buffer, Column column) throws IOException {
-
     String uqName = column.getUnique();
     if (uqName == null) {
       uqName = column.getUniqueOneToOne();
     }
-
     buffer.append(",").newLine();
     buffer.append("  constraint ").append(uqName).append(" unique ");
     buffer.append("(");
@@ -549,7 +531,6 @@ public class BaseTableDdl implements TableDdl {
    * Write the primary key constraint inline with the create table statement.
    */
   protected void writePrimaryKeyConstraint(DdlBuffer buffer, String pkName, String[] pkColumns) throws IOException {
-
     buffer.append(",").newLine();
     buffer.append("  constraint ").append(pkName).append(" primary key");
     appendColumns(pkColumns, buffer);
@@ -559,7 +540,6 @@ public class BaseTableDdl implements TableDdl {
    * Return as an array of string column names.
    */
   protected String[] toColumnNames(List<Column> columns) {
-
     String[] cols = new String[columns.size()];
     for (int i = 0; i < cols.length; i++) {
       cols[i] = columns.get(i).getName();
@@ -682,13 +662,11 @@ public class BaseTableDdl implements TableDdl {
    */
   @Override
   public void generate(DdlWrite writer, AddColumn addColumn) throws IOException {
-
     String tableName = addColumn.getTableName();
     List<Column> columns = addColumn.getColumn();
     for (Column column : columns) {
       alterTableAddColumn(writer.apply(), tableName, column, false, isTrue(addColumn.isWithHistory()));
     }
-
     if (isTrue(addColumn.isWithHistory()) && historySupport == HistorySupport.TRIGGER_BASED) {
       // make same changes to the history table
       String historyTable = historyTable(tableName);
@@ -697,14 +675,11 @@ public class BaseTableDdl implements TableDdl {
         alterTableAddColumn(writer.apply(), historyTable, column, true, true);
       }
     }
-
     for (Column column : columns) {
       if (hasValue(column.getReferences())) {
         writeForeignKey(writer, tableName, column);
       }
     }
-
-    // add a bit of whitespace
     writer.apply().end();
   }
 
@@ -713,9 +688,7 @@ public class BaseTableDdl implements TableDdl {
    */
   @Override
   public void generate(DdlWrite writer, DropTable dropTable) throws IOException {
-
     dropTable(writer.apply(), dropTable.getName());
-
     if (hasValue(dropTable.getSequenceCol())
         && platformDdl.getPlatform().getDbIdentity().isSupportsSequence()) {
       String sequenceName = dropTable.getSequenceName();
@@ -731,9 +704,7 @@ public class BaseTableDdl implements TableDdl {
    */
   @Override
   public void generate(DdlWrite writer, DropColumn dropColumn) throws IOException {
-
     String tableName = dropColumn.getTableName();
-
     alterTableDropColumn(writer.apply(), tableName, dropColumn.getColumnName());
 
     if (isTrue(dropColumn.isWithHistory())  && historySupport == HistorySupport.TRIGGER_BASED) {
@@ -741,7 +712,6 @@ public class BaseTableDdl implements TableDdl {
       regenerateHistoryTriggers(tableName, HistoryTableUpdate.Change.DROP, dropColumn.getColumnName());
       alterTableDropColumn(writer.apply(), historyTable(tableName), dropColumn.getColumnName());
     }
-
     writer.apply().end();
   }
 
@@ -826,7 +796,6 @@ public class BaseTableDdl implements TableDdl {
    * Register the base table that we need to regenerate the history triggers on.
    */
   protected void regenerateHistoryTriggers(String baseTableName, HistoryTableUpdate.Change change, String column) {
-
     HistoryTableUpdate update = regenerateHistoryTriggers.computeIfAbsent(baseTableName, HistoryTableUpdate::new);
     update.add(change, column);
   }
@@ -836,7 +805,6 @@ public class BaseTableDdl implements TableDdl {
    * Will be called, if there is a type, dbdefault or notnull change.
    */
   protected void alterColumnBaseAttributes(DdlWrite writer, AlterColumn alter) throws IOException {
-
     String ddl = platformDdl.alterColumnBaseAttributes(alter);
     if (hasValue(ddl)) {
       writer.apply().appendStatement(ddl);
@@ -857,27 +825,22 @@ public class BaseTableDdl implements TableDdl {
   }
 
   protected void alterColumnDefaultValue(DdlWrite writer, AlterColumn alter) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterColumnDefaultValue(alter.getTableName(), alter.getColumnName(), alter.getDefaultValue()));
   }
 
   protected void dropCheckConstraint(DdlWrite writer, AlterColumn alter, String constraintName) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterTableDropConstraint(alter.getTableName(), constraintName));
   }
 
   protected void addCheckConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterTableAddCheckConstraint(alter.getTableName(), alter.getCheckConstraintName(), alter.getCheckConstraint()));
   }
 
   protected void alterColumnNotnull(DdlWrite writer, AlterColumn alter) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterColumnNotnull(alter.getTableName(), alter.getColumnName(), alter.isNotnull()));
   }
 
   protected void alterColumnType(DdlWrite writer, AlterColumn alter) throws IOException {
-
     String ddl = platformDdl.alterColumnType(alter.getTableName(), alter.getColumnName(), alter.getType());
     if (hasValue(ddl)) {
       writer.apply().appendStatement(ddl);
@@ -891,33 +854,26 @@ public class BaseTableDdl implements TableDdl {
   }
 
   protected void alterColumnAddForeignKey(DdlWrite writer, AlterColumn alterColumn) throws IOException {
-
     alterTableAddForeignKey(writer.getOptions(), writer.apply(), new WriteForeignKey(alterColumn));
   }
 
   protected void alterColumnDropForeignKey(DdlWrite writer, AlterColumn alter) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterTableDropForeignKey(alter.getTableName(), alter.getDropForeignKey()));
   }
 
-
   protected void alterColumnDropUniqueConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
-
     writer.apply().appendStatement(platformDdl.alterTableDropUniqueConstraint(alter.getTableName(), alter.getDropUnique()));
   }
 
   protected void alterColumnAddUniqueOneToOneConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
-
     addUniqueConstraint(writer, alter, alter.getUniqueOneToOne());
   }
 
   protected void alterColumnAddUniqueConstraint(DdlWrite writer, AlterColumn alter) throws IOException {
-
     addUniqueConstraint(writer, alter, alter.getUnique());
   }
 
   protected void addUniqueConstraint(DdlWrite writer, AlterColumn alter, String uqName) throws IOException {
-
     String[] cols = {alter.getColumnName()};
     boolean notNull = alter.isNotnull() != null ? alter.isNotnull() : Boolean.TRUE.equals(alter.isNotnull());
     writer.apply().appendStatement(platformDdl.alterTableAddUniqueConstraint(alter.getTableName(), uqName, cols, notNull ? null : cols));
@@ -965,11 +921,4 @@ public class BaseTableDdl implements TableDdl {
     return Boolean.TRUE.equals(value);
   }
 
-  /**
-   * Return as an int value with 0 when it is null.
-   */
-  protected int toInt(BigInteger value) {
-    return (value == null) ? 0 : value.intValue();
-  }
-
 }

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/MariaDbDdl.java

@@ -0,0 +1,14 @@
+package io.ebeaninternal.dbmigration.ddlgeneration.platform;
+
+import io.ebean.config.dbplatform.DatabasePlatform;
+
+/**
+ * MariaDB platform DDL.
+ */
+public class MariaDbDdl extends MySqlDdl {
+
+  public MariaDbDdl(DatabasePlatform platform) {
+    super(platform);
+    this.historyDdl = new MariaDbHistoryDdl();
+  }
+}

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/MariaDbHistoryDdl.java

@@ -0,0 +1,53 @@
+package io.ebeaninternal.dbmigration.ddlgeneration.platform;
+
+import io.ebean.config.ServerConfig;
+import io.ebeaninternal.dbmigration.ddlgeneration.DdlBuffer;
+import io.ebeaninternal.dbmigration.ddlgeneration.DdlWrite;
+import io.ebeaninternal.dbmigration.migration.AddHistoryTable;
+import io.ebeaninternal.dbmigration.migration.DropHistoryTable;
+import io.ebeaninternal.dbmigration.model.MTable;
+
+import java.io.IOException;
+
+/**
+ * History DDL for MariaDB.
+ */
+public class MariaDbHistoryDdl implements PlatformHistoryDdl {
+
+  @Override
+  public void configure(ServerConfig serverConfig, PlatformDdl platformDdl) {
+    // do nothing
+  }
+
+  @Override
+  public void createWithHistory(DdlWrite writer, MTable table) throws IOException {
+    String baseTable = table.getName();
+    enableSystemVersioning(writer, baseTable);
+  }
+
+  private void enableSystemVersioning(DdlWrite writer, String baseTable) throws IOException {
+    DdlBuffer apply = writer.applyHistoryView();
+    apply.append("alter table ").append(baseTable).append(" add system versioning").endOfStatement();
+
+    DdlBuffer drop = writer.dropAll();
+    drop.append("alter table ").append(baseTable).append(" drop system versioning").endOfStatement();
+  }
+
+  @Override
+  public void dropHistoryTable(DdlWrite writer, DropHistoryTable dropHistoryTable) throws IOException {
+    String baseTable = dropHistoryTable.getBaseTable();
+    DdlBuffer apply = writer.applyHistoryView();
+    apply.append("alter table ").append(baseTable).append(" drop system versioning").endOfStatement();
+  }
+
+  @Override
+  public void addHistoryTable(DdlWrite writer, AddHistoryTable addHistoryTable) throws IOException {
+    String baseTable = addHistoryTable.getBaseTable();
+    enableSystemVersioning(writer, baseTable);
+  }
+
+  @Override
+  public void updateTriggers(DdlWrite writer, HistoryTableUpdate baseTable) {
+    // do nothing
+  }
+}

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/OracleDdl.java

@@ -6,9 +6,9 @@ import io.ebean.config.dbplatform.DatabasePlatform;
 /**
  * Oracle platform specific DDL.
  */
-public class Oracle10Ddl extends PlatformDdl {
+public class OracleDdl extends PlatformDdl {
 
-  public Oracle10Ddl(DatabasePlatform platform) {
+  public OracleDdl(DatabasePlatform platform) {
     super(platform);
     this.dropTableIfExists = "drop table ";
     this.dropSequenceIfExists = "drop sequence ";
@@ -48,4 +48,12 @@ public class Oracle10Ddl extends PlatformDdl {
     }
   }
 
+  /**
+   * Modify and return the column definition for autoincrement or identity definition.
+   */
+  @Override
+  public String asIdentityColumn(String columnDefn, DdlIdentity identity) {
+    return asIdentityStandardOptions(columnDefn, identity);
+  }
+
 }

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/PlatformDdl.java

@@ -195,7 +195,6 @@ public class PlatformDdl {
    * SQl2003 standard identity definition.
    */
   protected String asIdentityStandardOptions(String columnDefn, DdlIdentity identity) {
-
     StringBuilder sb = new StringBuilder(columnDefn.length() + 60);
     sb.append(columnDefn).append(identity.optionGenerated());
     sb.append(identity.identityOptions(identityStartWith, identityIncrementBy, identityCache));

src/main/java/io/ebeaninternal/dbmigration/ddlgeneration/platform/PostgresDdl.java

@@ -54,4 +54,9 @@ public class PostgresDdl extends PlatformDdl {
   public String asIdentityColumn(String columnDefn, DdlIdentity identity) {
     return asIdentityStandardOptions(columnDefn, identity);
   }
+
+  @Override
+  public String alterColumnType(String tableName, String columnName, String type) {
+    return super.alterColumnType(tableName, columnName, type) + " using " + columnName + "::" + convert(type);
+  }
 }

src/main/java/io/ebeaninternal/dbmigration/model/MColumn.java

@@ -15,7 +15,7 @@ import java.util.Objects;
  */
 public class MColumn {
 
-  private final String name;
+  private String name;
   private String type;
   private String checkConstraint;
   private String checkConstraintName;
@@ -88,7 +88,6 @@ public class MColumn {
    * Return a copy of this column used for creating the associated draft table.
    */
   public MColumn copyForDraft() {
-
     MColumn copy = new MColumn(name, type);
     copy.draftOnly = draftOnly;
     copy.checkConstraint = checkConstraint;
@@ -470,6 +469,14 @@ public class MColumn {
     this.dbMigrationInfos = dbMigrationInfos;
   }
 
+  /**
+   * Rename the column.
+   */
+  public MColumn rename(String newName) {
+    this.name = newName;
+    return this;
+  }
+
   /**
    * Apply changes based on the AlterColumn request.
    */

src/main/java/io/ebeaninternal/dbmigration/model/MCompoundUniqueConstraint.java

@@ -55,7 +55,7 @@ public class MCompoundUniqueConstraint {
   public MCompoundUniqueConstraint(AddUniqueConstraint change) {
     this.name = change.getConstraintName();
     this.columns = split(change.getColumnNames());
-    this.oneToOne = change.isOneToOne();
+    this.oneToOne = Boolean.TRUE.equals(change.isOneToOne());
     this.platforms = change.getPlatforms();
     this.nullableColumns = splitWithNull(change.getNullableColumns());
   }
@@ -63,7 +63,7 @@ public class MCompoundUniqueConstraint {
   public MCompoundUniqueConstraint(UniqueConstraint uq) {
     this.name = uq.getName();
     this.columns = split(uq.getColumnNames());
-    this.oneToOne = uq.isOneToOne();
+    this.oneToOne = Boolean.TRUE.equals(uq.isOneToOne());
     this.platforms = uq.getPlatforms();
     this.nullableColumns = splitWithNull(uq.getNullableColumns());
   }

src/main/java/io/ebeaninternal/dbmigration/model/MTable.java

@@ -11,6 +11,7 @@ import io.ebeaninternal.dbmigration.migration.DropColumn;
 import io.ebeaninternal.dbmigration.migration.DropHistoryTable;
 import io.ebeaninternal.dbmigration.migration.DropTable;
 import io.ebeaninternal.dbmigration.migration.ForeignKey;
+import io.ebeaninternal.dbmigration.migration.RenameColumn;
 import io.ebeaninternal.dbmigration.migration.UniqueConstraint;
 import io.ebeaninternal.server.deploy.BeanDescriptor;
 import io.ebeaninternal.server.deploy.BeanProperty;
@@ -415,6 +416,15 @@ public class MTable {
     }
   }
 
+  public void apply(RenameColumn renameColumn) {
+    checkTableName(renameColumn.getTableName());
+    MColumn column = columns.remove(renameColumn.getOldName());
+    if (column == null) {
+      throw new IllegalStateException("Column [" + renameColumn.getOldName() + "] does not exist for RenameColumn change on table [" + renameColumn.getTableName() + "]?");
+    }
+    addColumn(column.rename(renameColumn.getNewName()));
+  }
+
   public String getName() {
     return name;
   }

src/main/java/io/ebeaninternal/dbmigration/model/ModelContainer.java

@@ -17,6 +17,7 @@ import io.ebeaninternal.dbmigration.migration.DropHistoryTable;
 import io.ebeaninternal.dbmigration.migration.DropIndex;
 import io.ebeaninternal.dbmigration.migration.DropTable;
 import io.ebeaninternal.dbmigration.migration.Migration;
+import io.ebeaninternal.dbmigration.migration.RenameColumn;
 import io.ebeaninternal.dbmigration.migration.Sql;
 
 import java.util.ArrayList;
@@ -163,6 +164,8 @@ public class ModelContainer {
         applyChange((AddColumn) change);
       } else if (change instanceof DropColumn) {
         applyChange((DropColumn) change);
+      } else if (change instanceof RenameColumn) {
+        applyChange((RenameColumn) change);
       } else if (change instanceof CreateIndex) {
         applyChange((CreateIndex) change);
       } else if (change instanceof DropIndex) {
@@ -314,6 +317,14 @@ public class ModelContainer {
     table.apply(dropColumn);
   }
 
+  protected void applyChange(RenameColumn renameColumn) {
+    MTable table = tables.get(renameColumn.getTableName());
+    if (table == null) {
+      throw new IllegalStateException("Table [" + renameColumn.getTableName() + "] does not exist in model?");
+    }
+    table.apply(renameColumn);
+  }
+
   /**
    * Add a table (typically from reading EbeanServer meta data).
    */

src/main/java/io/ebeaninternal/server/core/AbstractSqlQueryRequest.java

@@ -58,7 +58,7 @@ public abstract class AbstractSqlQueryRequest {
       trans = server.currentServerTransaction();
       if (trans == null || !trans.isActive()) {
         // create a local readOnly transaction
-        trans = server.createQueryTransaction(null);
+        trans = server.createReadOnlyTransaction(null);
         createdTransaction = true;
       }
     }

src/main/java/io/ebeaninternal/server/core/DatabasePlatformFactory.java

@@ -8,6 +8,7 @@ import io.ebean.config.dbplatform.db2.DB2Platform;
 import io.ebean.config.dbplatform.h2.H2Platform;
 import io.ebean.config.dbplatform.hana.HanaPlatform;
 import io.ebean.config.dbplatform.hsqldb.HsqldbPlatform;
+import io.ebean.config.dbplatform.mariadb.MariaDbPlatform;
 import io.ebean.config.dbplatform.mysql.MySql55Platform;
 import io.ebean.config.dbplatform.mysql.MySqlPlatform;
 import io.ebean.config.dbplatform.nuodb.NuoDbPlatform;
@@ -76,11 +77,13 @@ public class DatabasePlatformFactory {
    * Lookup the platform by name.
    */
   private DatabasePlatform byDatabaseName(String dbName) {
-
     dbName = dbName.toLowerCase();
     if (dbName.equals("h2")) {
       return new H2Platform();
     }
+    if (dbName.equals("mariadb")) {
+      return new MariaDbPlatform();
+    }
     if (dbName.equals("mysql")) {
       return new MySqlPlatform();
     }
@@ -123,7 +126,6 @@ public class DatabasePlatformFactory {
     if (dbName.equals("hana")) {
       return new HanaPlatform();
     }
-
     throw new RuntimeException("database platform " + dbName + " is not known?");
   }
 
@@ -160,14 +162,16 @@ public class DatabasePlatformFactory {
       return new OraclePlatform();
     } else if (dbProductName.contains("microsoft")) {
       throw new IllegalArgumentException("For SqlServer please explicitly choose either sqlserver16 or sqlserver17 as the platform via ServerConfig.setDatabasePlatformName. Refer to issue #1340 for more details");
-    } else if (dbProductName.contains("mysql")) {
-      return mysqlVersion(majorVersion, minorVersion);
     } else if (dbProductName.contains("h2")) {
       return new H2Platform();
     } else if (dbProductName.contains("hsql database engine")) {
       return new HsqldbPlatform();
     } else if (dbProductName.contains("postgres")) {
       return readPostgres(connection, majorVersion);
+    } else if (dbProductName.contains("mariadb")) {
+      return new MariaDbPlatform();
+    } else if (dbProductName.contains("mysql")) {
+      return mysqlVersion(majorVersion, minorVersion);
     } else if (dbProductName.contains("nuo")) {
       return new NuoDbPlatform();
     } else if (dbProductName.contains("sqlite")) {

src/main/java/io/ebeaninternal/server/core/DefaultBackgroundExecutor.java

@@ -33,7 +33,6 @@ public class DefaultBackgroundExecutor implements SpiBackgroundExecutor {
   @Override
   public void execute(Runnable r) {
     final Map<String, String> map = MDC.getCopyOfContextMap();
-
     if (map == null) {
       pool.execute(r);
     } else {
@@ -50,10 +49,14 @@ public class DefaultBackgroundExecutor implements SpiBackgroundExecutor {
 
   @Override
   public void executePeriodically(Runnable r, long delay, TimeUnit unit) {
-    final Map<String, String> map = MDC.getCopyOfContextMap();
+    executePeriodically(r, delay, delay, unit);
+  }
 
+  @Override
+  public void executePeriodically(Runnable r, long initialDelay, long delay, TimeUnit unit) {
+    final Map<String, String> map = MDC.getCopyOfContextMap();
     if (map == null) {
-      schedulePool.scheduleWithFixedDelay(r, delay, delay, unit);
+      schedulePool.scheduleWithFixedDelay(r, initialDelay, delay, unit);
     } else {
       schedulePool.scheduleWithFixedDelay(() -> {
         MDC.setContextMap(map);
@@ -62,14 +65,13 @@ public class DefaultBackgroundExecutor implements SpiBackgroundExecutor {
         } finally {
           MDC.clear();
         }
-      }, delay, delay, unit);
+      }, initialDelay, delay, unit);
     }
   }
 
   @Override
   public ScheduledFuture<?> schedule(Runnable r, long delay, TimeUnit unit) {
     final Map<String, String> map = MDC.getCopyOfContextMap();
-
     if (map == null) {
       return schedulePool.schedule(r, delay, unit);
     } else {
@@ -87,7 +89,6 @@ public class DefaultBackgroundExecutor implements SpiBackgroundExecutor {
   @Override
   public <V> ScheduledFuture<V> schedule(Callable<V> c, long delay, TimeUnit unit) {
     final Map<String, String> map = MDC.getCopyOfContextMap();
-
     if (map == null) {
       return schedulePool.schedule(c, delay, unit);
     } else {

src/main/java/io/ebeaninternal/server/core/DefaultBeanLoader.java

@@ -170,7 +170,7 @@ class DefaultBeanLoader {
   private List<?> executeQuery(LoadRequest loadRequest, SpiQuery<?> query) {
     if (onIterateUseExtraTxn && loadRequest.isParentFindIterate()) {
       // MySql - we need a different transaction to execute the secondary query
-      SpiTransaction extraTxn = server.createQueryTransaction(query.getTenantId());
+      SpiTransaction extraTxn = server.createReadOnlyTransaction(query.getTenantId());
       try {
         return server.findList(query, extraTxn);
       } finally {

src/main/java/io/ebeaninternal/server/core/DefaultContainer.java

@@ -8,10 +8,6 @@ import io.ebean.config.TenantMode;
 import io.ebean.config.UnderscoreNamingConvention;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.config.dbplatform.h2.H2Platform;
-import io.ebean.datasource.DataSourceAlertFactory;
-import io.ebean.datasource.DataSourceConfig;
-import io.ebean.datasource.DataSourceFactory;
-import io.ebean.datasource.DataSourcePoolListener;
 import io.ebean.service.SpiContainer;
 import io.ebeaninternal.api.SpiBackgroundExecutor;
 import io.ebeaninternal.api.SpiEbeanServer;
@@ -24,7 +20,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.persistence.PersistenceException;
-import javax.sql.DataSource;
 import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.List;
@@ -39,13 +34,8 @@ public class DefaultContainer implements SpiContainer {
 
   private final ClusterManager clusterManager;
 
-  private final JndiDataSourceLookup jndiDataSourceFactory;
-
   public DefaultContainer(ContainerConfig containerConfig) {
-
     this.clusterManager = new ClusterManager(containerConfig);
-    this.jndiDataSourceFactory = new JndiDataSourceLookup();
-
     // register so that we can shutdown any Ebean wide
     // resources such as clustering
     ShutdownManager.registerContainer(this);
@@ -230,75 +220,10 @@ public class DefaultContainer implements SpiContainer {
    * Set the DataSource if it has not already been set.
    */
   private void setDataSource(ServerConfig config) {
-    if (config.getDataSource() == null) {
-      config.setDataSource(getDataSourceFromConfig(config, false));
-    }
-    if (config.getReadOnlyDataSource() == null && config.isAutoReadOnlyDataSource()) {
-      config.setReadOnlyDataSource(getDataSourceFromConfig(config, true));
-    }
-  }
-
-  private DataSource getDataSourceFromConfig(ServerConfig config, boolean readOnly) {
-
     if (isOfflineMode(config)) {
       logger.debug("... DbOffline using platform [{}]", DbOffline.getPlatform());
-      return null;
-    }
-
-    if (!readOnly && config.getDataSourceJndiName() != null) {
-      DataSource ds = jndiDataSourceFactory.lookup(config.getDataSourceJndiName());
-      if (ds == null) {
-        throw new PersistenceException("JNDI lookup for DataSource " + config.getDataSourceJndiName() + " returned null.");
-      } else {
-        return ds;
-      }
-    }
-
-    DataSourceConfig dsConfig = (readOnly) ? config.getReadOnlyDataSourceConfig() : config.getDataSourceConfig();
-    if (dsConfig == null) {
-      throw new PersistenceException("No DataSourceConfig defined for " + config.getName());
-    }
-
-    if (dsConfig.isOffline()) {
-      if (config.getDatabasePlatformName() == null) {
-        throw new PersistenceException("You MUST specify a DatabasePlatformName on ServerConfig when offline");
-      }
-      return null;
-    }
-
-    DataSourceFactory factory = DataSourceFactory.get();
-    if (factory == null) {
-      throw new IllegalStateException("No DataSourceFactory service implementation found in class path."
-        + " Probably missing dependency to avaje-datasource?");
-    }
-
-    DataSourceAlertFactory alertFactory = config.service(DataSourceAlertFactory.class);
-    if (alertFactory != null) {
-      dsConfig.setAlert(alertFactory.createAlert());
-    }
-
-    attachListener(config, dsConfig);
-
-    if (readOnly) {
-      // setup to use AutoCommit such that we skip explicit commit
-      dsConfig.setAutoCommit(true);
-      //dsConfig.setReadOnly(true);
-      dsConfig.setDefaults(config.getDataSourceConfig());
-      dsConfig.setIsolationLevel(config.getDataSourceConfig().getIsolationLevel());
-    }
-    String poolName = config.getName() + (readOnly ? "-ro" : "");
-    return factory.createPool(poolName, dsConfig);
-  }
-
-  /**
-   * Create and attach a DataSourcePoolListener if it has been specified via properties and there is not one already attached.
-   */
-  private void attachListener(ServerConfig config, DataSourceConfig dsConfig) {
-    if (dsConfig.getListener() == null) {
-      String poolListener = dsConfig.getPoolListener();
-      if (poolListener != null) {
-        dsConfig.setListener((DataSourcePoolListener) config.getClassLoadConfig().newInstance(poolListener));
-      }
+    } else {
+      InitDataSource.init(config);
     }
   }
 
@@ -331,7 +256,7 @@ public class DefaultContainer implements SpiContainer {
     }
 
     try (Connection connection = serverConfig.getDataSource().getConnection()) {
-      if (!serverConfig.isAutoCommitMode() && connection.getAutoCommit()) {
+      if (connection.getAutoCommit()) {
         logger.warn("DataSource [{}] has autoCommit defaulting to true!", serverConfig.getName());
       }
       return true;

src/main/java/io/ebeaninternal/server/core/DefaultServer.java

@@ -311,9 +311,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   }
 
   private void configureServerPlugins() {
-
     autoTuneService.startup();
-
     for (Plugin plugin : serverPlugins) {
       plugin.configure(this);
     }
@@ -323,7 +321,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Execute all the plugins with an online flag indicating the DB is up or not.
    */
   public void executePlugins(boolean online) {
-
     if (!serverConfig.isDocStoreOnly()) {
       ddlGenerator.execute(online);
     }
@@ -471,14 +468,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Shutdown the services like threads and DataSource.
    */
   private void shutdownInternal(boolean shutdownDataSource, boolean deregisterDriver) {
-
     logger.debug("Shutting down instance:{}", serverName);
     if (shutdown) {
       // already shutdown
       return;
     }
     shutdownPlugins();
-
     autoTuneService.shutdown();
     // shutdown background threads
     backgroundExecutor.shutdown();
@@ -492,11 +487,9 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   }
 
   private void shutdownPlugins() {
-
     if (serverConfig.isDumpMetricsOnShutdown()) {
       new DumpMetrics(this, serverConfig.getDumpMetricsOptions()).dump();
     }
-
     for (Plugin plugin : serverPlugins) {
       try {
         plugin.shutdown();
@@ -601,7 +594,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     if (a == null) {
       return null;
     }
-
     BeanDescriptor<?> desc = getBeanDescriptor(a.getClass());
     return DiffHelp.diff(a, b, desc);
   }
@@ -626,10 +618,8 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void externalModification(String tableName, boolean inserts, boolean updates, boolean deletes) {
-
     TransactionEventTable evt = new TransactionEventTable();
     evt.add(tableName, inserts, updates, deletes);
-
     externalModification(evt);
   }
 
@@ -697,14 +687,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   @SuppressWarnings({"unchecked", "rawtypes"})
   public <T> T getReference(Class<T> type, Object id) {
-
     if (id == null) {
       throw new NullPointerException("The id is null");
     }
-
     BeanDescriptor desc = getBeanDescriptor(type);
     id = desc.convertId(id);
-
     PersistenceContext pc = null;
     SpiTransaction t = transactionManager.getActive();
     if (t != null) {
@@ -719,12 +706,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     if (inheritInfo == null || inheritInfo.isConcrete()) {
       return (T) desc.contextRef(pc, null, false, id);
     }
-
     BeanProperty idProp = desc.getIdProperty();
     if (idProp == null) {
       throw new PersistenceException("No ID properties for this type? " + desc);
     }
-
     // we actually need to do a query because we don't know the type without the discriminator
     // value, just select the id property and discriminator column (auto added)
     return find(type).select(idProp.getName()).setId(id).findOne();
@@ -769,13 +754,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     ScopedTransaction scopeTrans = transactionManager.beginScopedTransaction(scope);
     try {
       return c.call();
-
     } catch (Error e) {
       throw scopeTrans.caughtError(e);
-
     } catch (Exception e) {
       throw new PersistenceException(scopeTrans.caughtThrowable(e));
-
     } finally {
       scopeTrans.complete();
     }
@@ -791,13 +773,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     ScopedTransaction t = transactionManager.beginScopedTransaction(scope);
     try {
       r.run();
-
     } catch (Error e) {
       throw t.caughtError(e);
-
     } catch (Exception e) {
       throw new PersistenceException(t.caughtThrowable(e));
-
     } finally {
       t.complete();
     }
@@ -879,7 +858,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   @SuppressWarnings("unchecked")
   public <T> void sort(List<T> list, String sortByClause) {
-
     if (list == null) {
       throw new NullPointerException("list is null");
     }
@@ -901,7 +879,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> Set<String> validateQuery(Query<T> query) {
-
     BeanDescriptor<T> beanDescriptor = getBeanDescriptor(query.getBeanType());
     if (beanDescriptor == null) {
       throw new PersistenceException("BeanDescriptor not found, is [" + query.getBeanType() + "] an entity bean?");
@@ -1010,13 +987,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       String m = beanType.getName() + " is NOT an Entity Bean registered with this server?";
       throw new PersistenceException(m);
     }
-
     return new DefaultOrmUpdate<>(beanType, this, desc.getBaseTable(), ormUpdate);
   }
 
   @Override
   public <T> DtoQuery<T> findDto(Class<T> dtoType, String sql) {
-
     DtoBeanDescriptor<T> descriptor = dtoBeanManager.getDescriptor(dtoType);
     return new DefaultDtoQuery<>(this, descriptor, sql.trim());
   }
@@ -1033,14 +1008,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> DtoQuery<T> findDto(Class<T> dtoType, SpiQuery<?> ormQuery) {
-
     DtoBeanDescriptor<T> descriptor = dtoBeanManager.getDescriptor(dtoType);
     return new DefaultDtoQuery<>(this, descriptor, ormQuery);
   }
 
   @Override
   public SpiResultSet findResultSet(SpiQuery<?> ormQuery, SpiTransaction transaction) {
-
     SpiOrmQueryRequest<?> request = createQueryRequest(ormQuery.getType(), ormQuery, transaction);
     request.initTransIfRequired();
     return request.findResultSet();
@@ -1073,7 +1046,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> T find(Class<T> beanType, Object uid) {
-
     return find(beanType, uid, null);
   }
 
@@ -1082,33 +1054,27 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public <T> T find(Class<T> beanType, Object id, Transaction t) {
-
     if (id == null) {
       throw new NullPointerException("The id is null");
     }
-
     Query<T> query = createQuery(beanType).setId(id);
     return findId(query, t);
   }
 
   <T> SpiOrmQueryRequest<T> createQueryRequest(Type type, Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = buildQueryRequest(type, query, t);
     request.prepareQuery();
     return request;
   }
 
   <T> SpiOrmQueryRequest<T> buildQueryRequest(Type type, Query<T> query, Transaction t) {
-
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     spiQuery.setType(type);
     spiQuery.checkNamedParameters();
-
     return buildQueryRequest(spiQuery, t);
   }
 
   private <T> SpiOrmQueryRequest<T> buildQueryRequest(SpiQuery<T> query, Transaction t) {
-
     if (t == null) {
       t = currentServerTransaction();
     }
@@ -1118,9 +1084,7 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       // to define the 'default' select clause
       query.setDefaultSelectClause();
     }
-
     query.selectAllForLazyLoadProperty();
-
     ProfileLocation profileLocation = query.getProfileLocation();
     if (profileLocation != null) {
       profileLocation.obtain();
@@ -1129,7 +1093,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     if (query.getParentNode() == null) {
       query.setOrigin(createCallOrigin());
     }
-
     return new OrmQueryRequest<>(this, queryEngine, query, (SpiTransaction) t);
   }
 
@@ -1138,15 +1101,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @SuppressWarnings("unchecked")
   private <T> T findIdCheckPersistenceContextAndCache(Transaction transaction, SpiQuery<T> query, Object id) {
-
     SpiTransaction t = (SpiTransaction) transaction;
     if (t == null) {
       t = currentServerTransaction();
     }
-
     BeanDescriptor<T> desc = query.getBeanDescriptor();
     id = desc.convertId(id);
-
     PersistenceContext pc = null;
     if (t != null && useTransactionPersistenceContext(query)) {
       // first look in the transaction scoped persistence context
@@ -1162,11 +1122,9 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
         }
       }
     }
-
     if (!query.isBeanCacheGet() || (t != null && t.isSkipCache())) {
       return null;
     }
-
     // Hit the L2 bean cache
     return desc.cacheBeanGet(id, query.isReadOnly(), pc);
   }
@@ -1189,7 +1147,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @SuppressWarnings("unchecked")
   private <T> T findId(Query<T> query, Transaction t) {
-
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     spiQuery.setType(Type.BEAN);
     if (SpiQuery.Mode.NORMAL == spiQuery.getMode() && !spiQuery.isForceHitDatabase()) {
@@ -1200,7 +1157,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
         return bean;
       }
     }
-
     SpiOrmQueryRequest<T> request = buildQueryRequest(spiQuery, t);
     request.prepareQuery();
     if (request.isUseDocStore()) {
@@ -1209,7 +1165,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return (T) request.findId();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1222,17 +1177,14 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> T findOne(Query<T> query, Transaction transaction) {
-
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     if (spiQuery.isFindById()) {
       // actually a find by Id query
       return findId(query, transaction);
     }
-
     if (transaction == null) {
       transaction = currentServerTransaction();
     }
-
     // a query that is expected to return either 0 or 1 beans
     List<T> list = findList(query, transaction, true);
     return extractUnique(list);
@@ -1241,10 +1193,8 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   private <T> T extractUnique(List<T> list) {
     if (list.isEmpty()) {
       return null;
-
     } else if (list.size() > 1) {
       throw new NonUniqueResultException("Unique expecting 0 or 1 results but got [" + list.size() + "]");
-
     } else {
       return list.get(0);
     }
@@ -1253,7 +1203,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   @SuppressWarnings({"unchecked", "rawtypes"})
   public <T> Set<T> findSet(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest request = createQueryRequest(Type.SET, query, t);
     Object result = request.getFromQueryCache();
     if (result != null) {
@@ -1270,7 +1219,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   @SuppressWarnings({"unchecked", "rawtypes"})
   public <K, T> Map<K, T> findMap(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest request = createQueryRequest(Type.MAP, query, t);
     request.resetBeanCacheAutoMode(false);
     if ((t == null || !t.isSkipCache()) && request.getFromBeanCache()) {
@@ -1292,7 +1240,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   @Override
   @SuppressWarnings("unchecked")
   public <A, T> List<A> findSingleAttributeList(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.ATTRIBUTE, query, t);
     Object result = request.getFromQueryCache();
     if (result != null) {
@@ -1301,7 +1248,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return (List<A>) request.findSingleAttributeList();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1309,7 +1255,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> int findCount(Query<T> query, Transaction t) {
-
     SpiQuery<T> spiQuery = ((SpiQuery<T>) query);
     if (!spiQuery.isDistinct()) {
       spiQuery = spiQuery.copy();
@@ -1319,7 +1264,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> int findCountWithCopy(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.COUNT, query, t);
     Integer result = request.getFromQueryCache();
     if (result != null) {
@@ -1328,7 +1272,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return request.findCount();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1342,7 +1285,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> boolean exists(Query<?> ormQuery, Transaction transaction) {
-
     Query<?> ormQueryCopy = ormQuery.copy();
     ormQueryCopy.setMaxRows(1);
     SpiOrmQueryRequest<?> request = createQueryRequest(Type.ID_LIST, ormQueryCopy, transaction);
@@ -1350,7 +1292,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       request.initTransIfRequired();
       List<Object> ids = request.findIds();
       return !ids.isEmpty();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1358,14 +1299,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <A, T> List<A> findIds(Query<T> query, Transaction t) {
-
     return findIdsWithCopy(((SpiQuery<T>) query).copy(), t);
   }
 
   @SuppressWarnings("unchecked")
   @Override
   public <A, T> List<A> findIdsWithCopy(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<?> request = createQueryRequest(Type.ID_LIST, query, t);
     Object result = request.getFromQueryCache();
     if (result != null) {
@@ -1378,7 +1317,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return request.findIds();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1386,7 +1324,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> int delete(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.DELETE, query, t);
     try {
       request.initTransIfRequired();
@@ -1410,7 +1347,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> int update(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.UPDATE, query, t);
     try {
       request.initTransIfRequired();
@@ -1423,82 +1359,60 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> FutureRowCount<T> findFutureCount(Query<T> q, Transaction t) {
-
     SpiQuery<T> copy = ((SpiQuery<T>) q).copy();
     copy.setFutureFetch(true);
-
     Transaction newTxn = createTransaction();
-
-    CallableQueryCount<T> call = new CallableQueryCount<>(this, copy, newTxn);
-
-    QueryFutureRowCount<T> queryFuture = new QueryFutureRowCount<>(call);
+    QueryFutureRowCount<T> queryFuture = new QueryFutureRowCount<>(new CallableQueryCount<T>(this, copy, newTxn));
     backgroundExecutor.execute(queryFuture.getFutureTask());
-
     return queryFuture;
   }
 
   @Override
   public <T> FutureIds<T> findFutureIds(Query<T> query, Transaction t) {
-
     SpiQuery<T> copy = ((SpiQuery<T>) query).copy();
     copy.setFutureFetch(true);
-
     Transaction newTxn = createTransaction();
-
-    CallableQueryIds<T> call = new CallableQueryIds<>(this, copy, newTxn);
-    QueryFutureIds<T> queryFuture = new QueryFutureIds<>(call);
-
+    QueryFutureIds<T> queryFuture = new QueryFutureIds<>(new CallableQueryIds<T>(this, copy, newTxn));
     backgroundExecutor.execute(queryFuture.getFutureTask());
-
     return queryFuture;
   }
 
   @Override
   public <T> FutureList<T> findFutureList(Query<T> query, Transaction t) {
-
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     spiQuery.setFutureFetch(true);
-
     // FutureList query always run in it's own persistence content
     spiQuery.setPersistenceContext(new DefaultPersistenceContext());
-
     if (!spiQuery.isDisableReadAudit()) {
       BeanDescriptor<T> desc = beanDescriptorManager.getBeanDescriptor(spiQuery.getBeanType());
       desc.readAuditFutureList(spiQuery);
     }
-
     // Create a new transaction solely to execute the findList() at some future time
     Transaction newTxn = createTransaction();
-    CallableQueryList<T> call = new CallableQueryList<>(this, spiQuery, newTxn);
-    QueryFutureList<T> queryFuture = new QueryFutureList<>(call);
+    QueryFutureList<T> queryFuture = new QueryFutureList<>(new CallableQueryList<T>(this, spiQuery, newTxn));
     backgroundExecutor.execute(queryFuture.getFutureTask());
     return queryFuture;
   }
 
   @Override
   public <T> PagedList<T> findPagedList(Query<T> query, Transaction transaction) {
-
     SpiQuery<T> spiQuery = (SpiQuery<T>) query;
     int maxRows = spiQuery.getMaxRows();
     if (maxRows == 0) {
       throw new PersistenceException("maxRows must be specified for findPagedList() query");
     }
-
     if (spiQuery.isUseDocStore()) {
       return docStore().findPagedList(createQueryRequest(Type.LIST, query, transaction));
     }
-
     return new LimitOffsetPagedList<>(this, spiQuery);
   }
 
   @Override
   public <T> QueryIterator<T> findIterate(Query<T> query, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.ITERATE, query, t);
     try {
       request.initTransIfRequired();
       return request.findIterate();
-
     } catch (RuntimeException ex) {
       request.endTransIfRequired();
       throw ex;
@@ -1507,19 +1421,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> Stream<T> findLargeStream(Query<T> query, Transaction transaction) {
-    return findStreamWithSingleContext(false, query, transaction);
+    return findStream(query, transaction);
   }
 
   @Override
   public <T> Stream<T> findStream(Query<T> query, Transaction transaction) {
-    return findStreamWithSingleContext(true, query, transaction);
-  }
-
-  private <T> Stream<T> findStreamWithSingleContext(boolean singleContext, Query<T> query, Transaction transaction) {
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.ITERATE, query, transaction);
-    if (singleContext) {
-      request.setIterateSingleContext();
-    }
     try {
       request.initTransIfRequired();
       return toStream(request.findIterate());
@@ -1549,14 +1456,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> void findEach(Query<T> query, Consumer<T> consumer, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.ITERATE, query, t);
-
     if (request.isUseDocStore()) {
       docStore().findEach(request, consumer);
       return;
     }
-
     request.initTransIfRequired();
     request.findEach(consumer);
     // no try finally - findEach guarantee's cleanup of the transaction if required
@@ -1564,13 +1468,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> void findEachWhile(Query<T> query, Predicate<T> consumer, Transaction t) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.ITERATE, query, t);
     if (request.isUseDocStore()) {
       docStore().findEachWhile(request, consumer);
       return;
     }
-
     request.initTransIfRequired();
     request.findEachWhile(consumer);
     // no try finally - findEachWhile guarantee's cleanup of the transaction if required
@@ -1578,12 +1480,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> List<Version<T>> findVersions(Query<T> query, Transaction transaction) {
-
     SpiOrmQueryRequest<T> request = createQueryRequest(Type.LIST, query, transaction);
     try {
       request.initTransIfRequired();
       return request.findVersions();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1596,14 +1496,12 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @SuppressWarnings("unchecked")
   private <T> List<T> findList(Query<T> query, Transaction t, boolean findOne) {
-
     SpiOrmQueryRequest<T> request = buildQueryRequest(Type.LIST, query, t);
     request.resetBeanCacheAutoMode(findOne);
     if ((t == null || !t.isSkipCache()) && request.getFromBeanCache()) {
       // hit bean cache and got all results from cache
       return request.getBeanCacheHits();
     }
-
     request.prepareQuery();
     Object result = request.getFromQueryCache();
     if (result != null) {
@@ -1612,11 +1510,9 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     if (request.isUseDocStore()) {
       return docStore().findList(request);
     }
-
     try {
       request.initTransIfRequired();
       return request.findList();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1624,7 +1520,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public SqlRow findOne(SqlQuery query, Transaction t) {
-
     // no findId() method for SqlQuery...
     // a query that is expected to return either 0 or 1 rows
     List<SqlRow> list = findList(query, t);
@@ -1633,7 +1528,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public void findEach(SqlQuery query, Consumer<SqlRow> consumer, Transaction transaction) {
-
     RelationalQueryRequest request = new RelationalQueryRequest(this, relationalQueryEngine, query, transaction);
     try {
       request.initTransIfRequired();
@@ -1645,7 +1539,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public void findEachWhile(SqlQuery query, Predicate<SqlRow> consumer, Transaction transaction) {
-
     RelationalQueryRequest request = new RelationalQueryRequest(this, relationalQueryEngine, query, transaction);
     try {
       request.initTransIfRequired();
@@ -1657,12 +1550,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public List<SqlRow> findList(SqlQuery query, Transaction t) {
-
     RelationalQueryRequest request = new RelationalQueryRequest(this, relationalQueryEngine, query, t);
     try {
       request.initTransIfRequired();
       return request.findList();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1709,7 +1600,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       request.findEach(consumer);
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1721,7 +1611,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       request.findEachWhile(consumer);
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1733,7 +1622,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return request.findList();
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1745,7 +1633,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     try {
       request.initTransIfRequired();
       return extractUnique(request.findList());
-
     } finally {
       request.endTransIfRequired();
     }
@@ -1796,7 +1683,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void updateAll(Collection<?> beans, Transaction transaction) {
-
     if (beans == null || beans.isEmpty()) {
       return;
     }
@@ -1837,7 +1723,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    */
   @Override
   public void insertAll(Collection<?> beans, Transaction transaction) {
-
     if (beans == null || beans.isEmpty()) {
       return;
     }
@@ -1851,7 +1736,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> List<T> publish(Query<T> query, Transaction transaction) {
-
     return executeInTrans((txn) -> persister.publish(query, txn), transaction);
   }
 
@@ -1867,7 +1751,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> T publish(Class<T> beanType, Object id, Transaction transaction) {
-
     Query<T> query = find(beanType).setId(id);
     List<T> liveBeans = publish(query, transaction);
     return (liveBeans.size() == 1) ? liveBeans.get(0) : null;
@@ -1875,13 +1758,11 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public <T> List<T> draftRestore(Query<T> query, Transaction transaction) {
-
     return executeInTrans((txn) -> persister.draftRestore(query, txn), transaction);
   }
 
   @Override
   public <T> T draftRestore(Class<T> beanType, Object id, Transaction transaction) {
-
     Query<T> query = find(beanType).setId(id);
     List<T> beans = draftRestore(query, transaction);
     return (beans.size() == 1) ? beans.get(0) : null;
@@ -1926,7 +1807,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Save all beans in the iterator with an explicit transaction.
    */
   private int saveAllInternal(Collection<?> beans, Transaction transaction) {
-
     if (beans == null || beans.isEmpty()) {
       return 0;
     }
@@ -1937,7 +1817,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
         persister.save(checkEntityBean(bean), txn);
         saveCount++;
       }
-
       txn.flushBatchOnCollection();
       return saveCount;
     }, transaction);
@@ -1964,7 +1843,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   }
 
   private int delete(Class<?> beanType, Object id, Transaction transaction, boolean permanent) {
-
     return executeInTrans((txn) -> persister.delete(beanType, id, txn, permanent), transaction);
   }
 
@@ -2050,19 +1928,16 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Delete all the beans in the iterator with an explicit transaction.
    */
   private int deleteAllInternal(Collection<?> beans, Transaction transaction, boolean permanent) {
-
     if (beans == null || beans.isEmpty()) {
       return 0;
     }
     return executeInTrans((txn) -> {
-
       txn.checkBatchEscalationOnCollection();
       int deleteCount = 0;
       for (Object bean : beans) {
         persister.delete(checkEntityBean(bean), txn, permanent);
         deleteCount++;
       }
-
       txn.flushBatchOnCollection();
       return deleteCount;
     }, transaction);
@@ -2163,7 +2038,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public boolean isSupportedType(java.lang.reflect.Type genericType) {
-
     TypeInfo typeInfo = ParamTypeHelper.getTypeInfo(genericType);
     return typeInfo != null && getBeanDescriptor(typeInfo.getBeanType()) != null;
   }
@@ -2286,7 +2160,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       P result = fun.apply(wrap.transaction());
       wrap.commitIfCreated();
       return result;
-
     } catch (RuntimeException e) {
       wrap.endIfCreated();
       throw e;
@@ -2299,7 +2172,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
    * Create a transaction if one is not currently active.
    */
   ObtainedTransaction initTransIfRequired(Transaction t) {
-
     if (t != null) {
       return new ObtainedTransaction((SpiTransaction) t);
     }
@@ -2322,8 +2194,8 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
-    return transactionManager.createQueryTransaction(tenantId);
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
+    return transactionManager.createReadOnlyTransaction(tenantId);
   }
 
   /**
@@ -2368,16 +2240,13 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
 
   @Override
   public Set<Property> checkUniqueness(Object bean, Transaction transaction) {
-
     EntityBean entityBean = checkEntityBean(bean);
     BeanDescriptor<?> beanDesc = getBeanDescriptor(entityBean.getClass());
-
     BeanProperty idProperty = beanDesc.getIdProperty();
     // if the ID of the Property is null we are unable to check uniqueness
     if (idProperty == null) {
       return Collections.emptySet();
     }
-
     Object id = idProperty.getVal(entityBean);
     if (entityBean._ebean_getIntercept().isNew() && id != null) {
       // Primary Key is changeable only on new models - so skip check if we are not
@@ -2390,7 +2259,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
         return ret;
       }
     }
-
     for (BeanProperty[] props : beanDesc.getUniqueProps()) {
       Set<Property> ret = checkUniqueness(entityBean, beanDesc, props, transaction);
       if (ret != null) {
@@ -2407,12 +2275,10 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
     BeanProperty idProperty = beanDesc.getIdProperty();
     Query<?> query = new DefaultOrmQuery<>(beanDesc, this, expressionFactory);
     ExpressionList<?> exprList = query.where();
-
     if (!entityBean._ebean_getIntercept().isNew()) {
       // if model is not new, exclude ourself.
       exprList.ne(idProperty.getName(), idProperty.getVal(entityBean));
     }
-
     for (Property prop : props) {
       Object value = prop.getVal(entityBean);
       if (value == null) {
@@ -2420,7 +2286,6 @@ public final class DefaultServer implements SpiServer, SpiEbeanServer {
       }
       exprList.eq(prop.getName(), value);
     }
-
     if (findCount(query, transaction) > 0) {
       Set<Property> ret = new LinkedHashSet<>();
       Collections.addAll(ret, props);

src/main/java/io/ebeaninternal/server/core/DtoQueryRequest.java

@@ -47,7 +47,7 @@ public final class DtoQueryRequest<T> extends AbstractSqlQueryRequest {
     SpiQuery<?> ormQuery = query.getOrmQuery();
     if (ormQuery != null) {
       ormQuery.setType(type);
-      ormQuery.setManualId(true);
+      ormQuery.setManualId();
 
       // execute the underlying ORM query returning the ResultSet
       SpiResultSet result = server.findResultSet(ormQuery, trans);
@@ -102,7 +102,7 @@ public final class DtoQueryRequest<T> extends AbstractSqlQueryRequest {
   @SuppressWarnings("unchecked")
   public T readNextBean() throws SQLException {
     dataReader.resetColumnPosition();
-    return (T)plan.readRow(dataReader);
+    return (T) plan.readRow(dataReader);
   }
 
   private DtoMappingRequest mappingRequest() throws SQLException {
@@ -110,19 +110,29 @@ public final class DtoQueryRequest<T> extends AbstractSqlQueryRequest {
   }
 
   private DtoColumn[] readMeta() throws SQLException {
-
     ResultSetMetaData metaData = resultSet.getMetaData();
     int cols = metaData.getColumnCount();
     DtoColumn[] meta = new DtoColumn[cols];
     for (int i = 0; i < cols; i++) {
-      int pos = i+1;
+      int pos = i + 1;
       String columnLabel = metaData.getColumnLabel(pos);
       if (columnLabel == null) {
         columnLabel = metaData.getColumnName(pos);
       }
-      meta[i] = new DtoColumn(columnLabel);
+      meta[i] = new DtoColumn(parseColumn(columnLabel));
     }
     return meta;
   }
 
+  static String parseColumn(String columnLabel) {
+    if (columnLabel.startsWith("_e_") || columnLabel.startsWith("_E_")) {
+      // encrypted column alias in the form _e_<tableAlias>_<column>
+      final int pos = columnLabel.indexOf("_", 3);
+      if (pos > -1) {
+        return columnLabel.substring(pos + 1);
+      }
+    }
+    return columnLabel;
+  }
+
 }

src/main/java/io/ebeaninternal/server/core/InitDataSource.java

@@ -0,0 +1,145 @@
+package io.ebeaninternal.server.core;
+
+import io.ebean.config.ServerConfig;
+import io.ebean.datasource.DataSourceAlertFactory;
+import io.ebean.datasource.DataSourceConfig;
+import io.ebean.datasource.DataSourceFactory;
+import io.ebean.datasource.DataSourcePoolListener;
+
+import javax.persistence.PersistenceException;
+import javax.sql.DataSource;
+
+/**
+ * Initialise the main DataSource and read-only DataSource.
+ */
+class InitDataSource {
+
+  private final JndiDataSourceLookup jndiDataSourceFactory = new JndiDataSourceLookup();
+
+  private final ServerConfig config;
+
+  /**
+   * Create and set the main DataSource and read-only DataSource.
+   */
+  static void init(ServerConfig config) {
+    new InitDataSource(config).initialise();
+  }
+
+  InitDataSource(ServerConfig config) {
+    this.config = config;
+  }
+
+  private void initialise() {
+    if (config.getDataSource() == null) {
+      config.setDataSource(initDataSource());
+    }
+    if (config.getReadOnlyDataSource() == null) {
+      config.setReadOnlyDataSource(initReadOnlyDataSource());
+    }
+  }
+
+  /**
+   * Initialise the "main" read write DataSource from configuration.
+   */
+  private DataSource initDataSource() {
+    final String jndiName = config.getDataSourceJndiName();
+    if (jndiName != null) {
+      return jndiDataSource(jndiName);
+    }
+    return createFromConfig(config.getDataSourceConfig(), false);
+  }
+
+  private DataSource jndiDataSource(String jndiName) {
+    DataSource ds = jndiDataSourceFactory.lookup(jndiName);
+    if (ds == null) {
+      throw new PersistenceException("JNDI lookup for DataSource " + jndiName + " returned null.");
+    }
+    return ds;
+  }
+
+  /**
+   * Initialise the "read only" DataSource from configuration.
+   */
+  private DataSource initReadOnlyDataSource() {
+    DataSourceConfig roConfig = readOnlyConfig();
+    return roConfig == null ? null : createFromConfig(roConfig, true);
+  }
+
+  DataSourceConfig readOnlyConfig() {
+    DataSourceConfig roConfig = config.getReadOnlyDataSourceConfig();
+    if (roConfig == null) {
+      // it has explicitly been set to null, not expected but ok
+      return null;
+    }
+    if (urlSet(roConfig.getUrl())) {
+      return roConfig;
+    }
+    // convenient alternate place to set the read-only url
+    final String readOnlyUrl = config.getDataSourceConfig().getReadOnlyUrl();
+    if (urlSet(readOnlyUrl)) {
+      roConfig.setUrl(readOnlyUrl);
+      return roConfig;
+    }
+    if (config.isAutoReadOnlyDataSource()) {
+      roConfig.setUrl(null); // blank out in case it is "none"
+      return roConfig;
+    } else {
+      return null;
+    }
+  }
+
+  private boolean urlSet(String url) {
+    return url != null && !"none".equalsIgnoreCase(url) && !url.trim().isEmpty();
+  }
+
+  private DataSource createFromConfig(DataSourceConfig dsConfig, boolean readOnly) {
+    if (dsConfig == null) {
+      throw new PersistenceException("No DataSourceConfig defined for " + config.getName());
+    }
+    if (dsConfig.isOffline()) {
+      if (config.getDatabasePlatformName() == null) {
+        throw new PersistenceException("You MUST specify a DatabasePlatformName on ServerConfig when offline");
+      }
+      return null;
+    }
+
+    attachAlert(dsConfig);
+    attachListener(dsConfig);
+
+    if (readOnly) {
+      // setup to use AutoCommit such that we skip explicit commit
+      dsConfig.setAutoCommit(true);
+      dsConfig.setReadOnly(true);
+      dsConfig.setDefaults(config.getDataSourceConfig());
+      dsConfig.setIsolationLevel(config.getDataSourceConfig().getIsolationLevel());
+    }
+    return create(dsConfig, readOnly);
+  }
+
+  private DataSource create(DataSourceConfig dsConfig, boolean readOnly) {
+    String poolName = config.getName() + (readOnly ? "-ro" : "");
+    return DataSourceFactory.create(poolName, dsConfig);
+  }
+
+  /**
+   * Attach DataSourceAlert via service loader if present.
+   */
+  private void attachAlert(DataSourceConfig dsConfig) {
+    DataSourceAlertFactory alertFactory = config.service(DataSourceAlertFactory.class);
+    if (alertFactory != null) {
+      dsConfig.setAlert(alertFactory.createAlert());
+    }
+  }
+
+  /**
+   * Create and attach a DataSourcePoolListener if it has been specified via properties and there is not one already attached.
+   */
+  private void attachListener(DataSourceConfig dsConfig) {
+    if (dsConfig.getListener() == null) {
+      String poolListener = dsConfig.getPoolListener();
+      if (poolListener != null) {
+        dsConfig.setListener((DataSourcePoolListener) config.getClassLoadConfig().newInstance(poolListener));
+      }
+    }
+  }
+}

src/main/java/io/ebeaninternal/server/core/InternalConfiguration.java

@@ -15,7 +15,6 @@ import io.ebean.config.ServerConfig;
 import io.ebean.config.SlowQueryListener;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.config.dbplatform.DbHistorySupport;
-import io.ebean.datasource.DataSourcePool;
 import io.ebean.event.changelog.ChangeLogListener;
 import io.ebean.event.changelog.ChangeLogPrepare;
 import io.ebean.event.changelog.ChangeLogRegister;
@@ -45,10 +44,10 @@ import io.ebeaninternal.server.changelog.DefaultChangeLogPrepare;
 import io.ebeaninternal.server.changelog.DefaultChangeLogRegister;
 import io.ebeaninternal.server.cluster.ClusterManager;
 import io.ebeaninternal.server.core.bootup.BootupClasses;
-import io.ebeaninternal.server.core.timezone.CloneDataTimeZone;
 import io.ebeaninternal.server.core.timezone.DataTimeZone;
-import io.ebeaninternal.server.core.timezone.LocalDataTimeZone;
+import io.ebeaninternal.server.core.timezone.MySqlDataTimeZone;
 import io.ebeaninternal.server.core.timezone.NoDataTimeZone;
+import io.ebeaninternal.server.core.timezone.OracleDataTimeZone;
 import io.ebeaninternal.server.core.timezone.SimpleDataTimeZone;
 import io.ebeaninternal.server.deploy.BeanDescriptorManager;
 import io.ebeaninternal.server.deploy.generatedproperty.GeneratedPropertyFactory;
@@ -78,12 +77,10 @@ import io.ebeaninternal.server.query.QueryPlanLoggerSqlServer;
 import io.ebeaninternal.server.readaudit.DefaultReadAuditLogger;
 import io.ebeaninternal.server.readaudit.DefaultReadAuditPrepare;
 import io.ebeaninternal.server.text.json.DJsonContext;
-import io.ebeaninternal.server.transaction.AutoCommitTransactionManager;
 import io.ebeaninternal.server.transaction.DataSourceSupplier;
 import io.ebeaninternal.server.transaction.DefaultProfileHandler;
 import io.ebeaninternal.server.transaction.DefaultTransactionScopeManager;
 import io.ebeaninternal.server.transaction.DocStoreTransactionManager;
-import io.ebeaninternal.server.transaction.ExplicitTransactionManager;
 import io.ebeaninternal.server.transaction.ExternalTransactionScopeManager;
 import io.ebeaninternal.server.transaction.JtaTransactionManager;
 import io.ebeaninternal.server.transaction.NoopProfileHandler;
@@ -100,7 +97,6 @@ import io.ebeanservice.docstore.none.NoneDocStoreFactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import javax.sql.DataSource;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -450,12 +446,6 @@ public class InternalConfiguration {
         indexUpdateProcessor, beanDescriptorManager, dataSource(), profileHandler(), logManager,
         tableModState, cacheNotify, clockService);
 
-    if (serverConfig.isExplicitTransactionBeginMode()) {
-      return new ExplicitTransactionManager(options);
-    }
-    if (isAutoCommitMode()) {
-      return new AutoCommitTransactionManager(options);
-    }
     if (serverConfig.isDocStoreOnly()) {
       return new DocStoreTransactionManager(options);
     }
@@ -492,18 +482,6 @@ public class InternalConfiguration {
     }
   }
 
-  /**
-   * Return true if autoCommit mode is on.
-   */
-  private boolean isAutoCommitMode() {
-    if (serverConfig.isAutoCommitMode()) {
-      // explicitly set
-      return true;
-    }
-    DataSource dataSource = serverConfig.getDataSource();
-    return dataSource instanceof DataSourcePool && ((DataSourcePool) dataSource).isAutoCommit();
-  }
-
   /**
    * Create the TransactionScopeManager taking into account JTA or external transaction manager.
    */
@@ -525,16 +503,15 @@ public class InternalConfiguration {
    * Create the DataTimeZone implementation to use.
    */
   private DataTimeZone initDataTimeZone() {
-
     String tz = serverConfig.getDataTimeZone();
     if (tz == null) {
       if (isMySql(getPlatform())) {
-        return new LocalDataTimeZone();
+        return new MySqlDataTimeZone();
       }
       return new NoDataTimeZone();
     }
     if (getPlatform().base() == Platform.ORACLE) {
-      return new CloneDataTimeZone(tz);
+      return new OracleDataTimeZone(tz);
     } else {
       return new SimpleDataTimeZone(tz);
     }
@@ -594,7 +571,10 @@ public class InternalConfiguration {
   }
 
   private ServerCachePlugin initServerCachePlugin() {
-
+    if (serverConfig.isLocalOnlyL2Cache()) {
+      localL2Caching = true;
+      return new DefaultServerCachePlugin();
+    }
     ServerCachePlugin plugin = serverConfig.getServerCachePlugin();
     if (plugin == null) {
       ServiceLoader<ServerCachePlugin> cacheFactories = ServiceLoader.load(ServerCachePlugin.class);

src/main/java/io/ebeaninternal/server/core/MultiTenantDbCatalogSupplier.java

@@ -57,14 +57,14 @@ public class MultiTenantDbCatalogSupplier implements DataSourceSupplier {
   @Override
   public void shutdown(boolean deregisterDriver) {
     if (readOnlyDataSource instanceof DataSourcePool) {
-      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+      ((DataSourcePool) readOnlyDataSource).shutdown();
     }
     if (dataSource instanceof DataSourcePool) {
-      ((DataSourcePool) dataSource).shutdown(deregisterDriver);
+      ((DataSourcePool) dataSource).shutdown();
     }
   }
 
-  private class CatalogDataSource implements DataSource {
+  private static class CatalogDataSource implements DataSource {
 
     final DataSource dataSource;
     final CurrentTenantProvider tenantProvider;

src/main/java/io/ebeaninternal/server/core/MultiTenantDbSchemaSupplier.java

@@ -57,10 +57,10 @@ class MultiTenantDbSchemaSupplier implements DataSourceSupplier {
   @Override
   public void shutdown(boolean deregisterDriver) {
     if (readOnlyDataSource instanceof DataSourcePool) {
-      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+      ((DataSourcePool) readOnlyDataSource).shutdown();
     }
     if (dataSource instanceof DataSourcePool) {
-      ((DataSourcePool) dataSource).shutdown(deregisterDriver);
+      ((DataSourcePool) dataSource).shutdown();
     }
   }
 

src/main/java/io/ebeaninternal/server/core/OrmQueryRequest.java

@@ -89,8 +89,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
 
   private Set<String> dependentTables;
 
-  private boolean iterateSingleContext;
-
   /**
    * Create the InternalQueryRequest.
    */
@@ -108,15 +106,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
     return queryEngine.translate(this, bindLog, sql, e);
   }
 
-  @Override
-  public void setIterateSingleContext() {
-    this.iterateSingleContext = true;
-  }
-
-  public boolean isIterateSingleContext() {
-    return iterateSingleContext;
-  }
-
   @Override
   public boolean isDeleteByStatement() {
     if (!transaction.isPersistCascade() || beanDescriptor.isDeleteByStatement()) {
@@ -286,7 +275,7 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
       } else {
         // create an implicit transaction to execute this query
         // potentially using read-only DataSource with autoCommit
-        transaction = ebeanServer.createQueryTransaction(query.getTenantId());
+        transaction = ebeanServer.createReadOnlyTransaction(query.getTenantId());
       }
       createdTransaction = true;
     }
@@ -316,7 +305,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
    */
   @Override
   public JsonReadOptions createJsonReadOptions() {
-
     persistenceContext = getPersistenceContext(query, transaction);
     if (query.getPersistenceContext() == null) {
       query.setPersistenceContext(persistenceContext);
@@ -327,7 +315,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
       loadContext = new DLoadContext(this, secondaryQueries);
       jsonRead.setLoadContext(loadContext);
     }
-
     return jsonRead;
   }
 
@@ -335,8 +322,8 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
    * For iterate queries reset the persistenceContext and loadContext.
    */
   public void flushPersistenceContextOnIterate() {
-    if (!iterateSingleContext) {
-      persistenceContext = new DefaultPersistenceContext();
+    if (persistenceContext.resetLimit()) {
+      persistenceContext = persistenceContext.forIterateReset();
       loadContext.resetPersistenceContext(persistenceContext);
       if (jsonRead != null) {
         jsonRead.setPersistenceContext(persistenceContext);
@@ -350,7 +337,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
    * transaction scoped.
    */
   private PersistenceContext getPersistenceContext(SpiQuery<?> query, SpiTransaction t) {
-
     // check if there is already a persistence context set which is the case
     // when lazy loading or query joins are executed
     PersistenceContext ctx = query.getPersistenceContext();
@@ -358,7 +344,14 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
 
     // determine the scope (from the query and then server)
     PersistenceContextScope scope = ebeanServer.getPersistenceContextScope(query);
-    return (scope == PersistenceContextScope.QUERY || t == null) ? new DefaultPersistenceContext() : t.getPersistenceContext();
+    if (scope == PersistenceContextScope.QUERY || t == null) {
+      return new DefaultPersistenceContext();
+    }
+    if (Type.ITERATE == query.getType()) {
+      return t.getPersistenceContext().forIterate();
+    } else {
+      return t.getPersistenceContext();
+    }
   }
 
   /**
@@ -578,6 +571,10 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
     return cacheKey != null && query.getUseQueryCache().isPut();
   }
 
+  public boolean isBeanCachePutMany() {
+    return !transaction.isSkipCacheExplicit() && query.isBeanCachePut();
+  }
+
   public boolean isBeanCachePut() {
     return !transaction.isSkipCache() && query.isBeanCachePut();
   }
@@ -586,7 +583,6 @@ public final class OrmQueryRequest<T> extends BeanRequest implements SpiOrmQuery
    * Merge in prior L2 bean cache hits with the query result.
    */
   public void mergeCacheHits(BeanCollection<T> result) {
-
     if (cacheBeans != null && !cacheBeans.isEmpty()) {
       if (query.getType() == Type.MAP) {
         mergeCacheHitsToMap(result);

src/main/java/io/ebeaninternal/server/core/PersistRequestBean.java

@@ -188,7 +188,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
 
   public PersistRequestBean(SpiEbeanServer server, T bean, Object parentBean, BeanManager<T> mgr, SpiTransaction t,
                             PersistExecute persistExecute, PersistRequest.Type type, int flags) {
-
     super(server, t, persistExecute);
     this.entityBean = (EntityBean) bean;
     this.intercept = entityBean._ebean_getIntercept();
@@ -204,7 +203,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
     if (Flags.isRecurse(flags)) {
       this.persistCascade = t.isPersistCascade();
     }
-
     if (this.type == Type.UPDATE) {
       if (intercept.isNew()) {
         // 'stateless update' - set loaded properties as dirty
@@ -279,7 +277,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * Init the transaction and also check for batch on cascade escalation.
    */
   public void initTransIfRequiredWithBatchCascade() {
-
     if (createImplicitTransIfRequired()) {
       docStoreMode = calcDocStoreMode(transaction, type);
     }
@@ -317,9 +314,7 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
   }
 
   private void onUpdateGeneratedProperties() {
-
     for (BeanProperty prop : beanDescriptor.propertiesGenUpdate()) {
-
       GeneratedProperty generatedProperty = prop.getGeneratedProperty();
       if (prop.isVersion()) {
         if (isLoadedProperty(prop)) {
@@ -451,7 +446,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * Return true if any of the given properties are dirty.
    */
   public boolean hasDirtyProperty(int[] propertyPositions) {
-
     for (int propertyPosition : propertyPositions) {
       if (dirtyProperties[propertyPosition]) {
         return true;
@@ -517,7 +511,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    */
   @Override
   public void docStoreUpdate(DocStoreUpdateContext txn) throws IOException {
-
     switch (type) {
       case INSERT:
         beanDescriptor.docStoreInsert(idValue, this, txn);
@@ -554,7 +547,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
   }
 
   public void addToPersistMap(BeanPersistIdMap beanPersistMap) {
-
     beanPersistMap.add(beanDescriptor, type, idValue);
   }
 
@@ -564,19 +556,15 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
         case INSERT:
           beanPersistListener.inserted(bean);
           break;
-
         case UPDATE:
           beanPersistListener.updated(bean, updatedProperties);
           break;
-
         case DELETE:
           beanPersistListener.deleted(bean);
           break;
-
         case DELETE_SOFT:
           beanPersistListener.softDeleted(bean);
           break;
-
         default:
       }
     }
@@ -785,7 +773,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
       case INSERT:
         executeInsert();
         return -1;
-
       case UPDATE:
         if (beanPersistListener != null) {
           // store the updated properties for sending later
@@ -793,15 +780,12 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
         }
         executeUpdate();
         return -1;
-
       case DELETE_SOFT:
         prepareForSoftDelete();
         executeSoftDelete();
         return -1;
-
       case DELETE:
         return executeDelete();
-
       default:
         throw new RuntimeException("Invalid type " + type);
     }
@@ -811,13 +795,11 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * Soft delete is executed as update so we want to set deleted=true property.
    */
   private void prepareForSoftDelete() {
-
     beanDescriptor.setSoftDeleteValue(entityBean);
   }
 
   @Override
   public int executeOrQueue() {
-
     boolean batch = isBatchThisRequest();
     try {
       BatchControl control = transaction.getBatchControl();
@@ -827,7 +809,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
       if (batch) {
         control = persistExecute.createBatchControl(transaction);
         return control.executeOrQueue(this, true);
-
       } else {
         return executeNoBatch();
       }
@@ -926,7 +907,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
       controllerPost();
     }
     setNotifyCache();
-
     boolean isChangeLog = beanDescriptor.isChangeLog();
     if (type == Type.UPDATE && (isChangeLog || notifyCache || docStoreMode == DocStoreMode.UPDATE)) {
       // get the dirty properties for update notification to the doc store
@@ -935,16 +915,13 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
     if (isChangeLog) {
       changeLog();
     }
-
     // if bean persisted again then should result in an update
     intercept.setLoaded();
     if (isInsert()) {
       postInsert();
     }
-
     addPostCommitListeners();
     notifyCacheOnPostExecute();
-
     if (isLogSummary()) {
       logSummary();
     }
@@ -994,7 +971,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
   }
 
   private void logSummary() {
-
     String draft = (beanDescriptor.isDraftable() && !publish) ? " draft[true]" : "";
     String name = beanDescriptor.getName();
     switch (type) {
@@ -1136,7 +1112,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * of queue events or list of update events.
    */
   public void addDocStoreUpdates(DocStoreUpdates docStoreUpdates) {
-
     if (type == Type.UPDATE) {
       beanDescriptor.docStoreUpdateEmbedded(this, docStoreUpdates);
     }
@@ -1165,7 +1140,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * </p>
    */
   private boolean determineUpdateAllLoadedProperties() {
-
     Boolean txnUpdateAll = transaction.isUpdateAllLoadedProperties();
     if (txnUpdateAll != null) {
       // use the setting explicitly set on the transaction
@@ -1174,7 +1148,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
       // if using batch use the server default setting
       requestUpdateAllLoadedProps = isBatchThisRequest() && ebeanServer.isUpdateAllPropertiesInBatch();
     }
-
     return requestUpdateAllLoadedProps;
   }
 
@@ -1196,25 +1169,21 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * Return the key for an update persist request.
    */
   public String getUpdatePlanHash() {
-
     StringBuilder key;
     if (determineUpdateAllLoadedProperties()) {
       key = intercept.getLoadedPropertyKey();
     } else {
       key = intercept.getDirtyPropertyKey();
     }
-
     BeanProperty versionProperty = beanDescriptor.getVersionProperty();
     if (versionProperty != null) {
       if (intercept.isLoadedProperty(versionProperty.getPropertyIndex())) {
         key.append('v');
       }
     }
-
     if (publish) {
       key.append('p');
     }
-
     return key.toString();
   }
 
@@ -1380,13 +1349,10 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
    * Build the bean update for the L2 cache.
    */
   public void addBeanUpdate(CacheChangeSet changeSet) {
-
     if (!updatedManysOnly || collectionChanges != null) {
-
       boolean updateNaturalKey = false;
 
       String key = beanDescriptor.cacheKey(idValue);
-
       Map<String, Object> changes = new LinkedHashMap<>();
       EntityBean bean = getEntityBean();
       boolean[] dirtyProperties = getDirtyProperties();
@@ -1399,7 +1365,8 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
               changes.put(property.getName(), val);
               if (property.isNaturalKey()) {
                 updateNaturalKey = true;
-                changeSet.addNaturalKeyPut(beanDescriptor, key, val.toString());
+                String valStr = (val == null) ? null : val.toString();
+                changeSet.addNaturalKeyPut(beanDescriptor, key, valStr);
               }
             }
           }
@@ -1409,7 +1376,6 @@ public final class PersistRequestBean<T> extends PersistRequest implements BeanP
         // add element collection update
         changes.putAll(collectionChanges);
       }
-
       changeSet.addBeanUpdate(beanDescriptor, key, changes, updateNaturalKey, getVersion());
     }
   }

src/main/java/io/ebeaninternal/server/core/PlatformDdlBuilder.java

@@ -7,9 +7,10 @@ import io.ebeaninternal.dbmigration.ddlgeneration.platform.DB2Ddl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.H2Ddl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.HanaColumnStoreDdl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.HsqldbDdl;
+import io.ebeaninternal.dbmigration.ddlgeneration.platform.MariaDbDdl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.MySqlDdl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.NuoDbDdl;
-import io.ebeaninternal.dbmigration.ddlgeneration.platform.Oracle10Ddl;
+import io.ebeaninternal.dbmigration.ddlgeneration.platform.OracleDdl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.PlatformDdl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.Postgres9Ddl;
 import io.ebeaninternal.dbmigration.ddlgeneration.platform.PostgresDdl;
@@ -31,6 +32,8 @@ public class PlatformDdlBuilder {
         return new H2Ddl(platform);
       case DB2:
         return new DB2Ddl(platform);
+      case MARIADB:
+        return new MariaDbDdl(platform);
       case MYSQL55:
       case MYSQL:
         return new MySqlDdl(platform);
@@ -40,7 +43,7 @@ public class PlatformDdlBuilder {
         return new NuoDbDdl(platform);
       case ORACLE:
       case ORACLE11:
-        return new Oracle10Ddl(platform);
+        return new OracleDdl(platform);
       case SQLITE:
         return new SQLiteDdl(platform);
       case POSTGRES9:

src/main/java/io/ebeaninternal/server/core/SimpleDataSourceProvider.java

@@ -44,10 +44,10 @@ class SimpleDataSourceProvider implements DataSourceSupplier {
   @Override
   public void shutdown(boolean deregisterDriver) {
     if (readOnlyDataSource instanceof DataSourcePool){
-      ((DataSourcePool) readOnlyDataSource).shutdown(false);
+      ((DataSourcePool) readOnlyDataSource).shutdown();
     }
     if (dataSource instanceof DataSourcePool){
-      ((DataSourcePool) dataSource).shutdown(deregisterDriver);
+      ((DataSourcePool) dataSource).shutdown();
     }
   }
 }

src/main/java/io/ebeaninternal/server/core/SpiOrmQueryRequest.java

@@ -177,9 +177,4 @@ public interface SpiOrmQueryRequest<T> extends BeanQueryRequest<T>, DocQueryRequ
    */
   boolean isDeleteByStatement();
 
-  /**
-   * Set when we want to use a single persistence context for all beans returned
-   * in the query (so all beans are held in memory)
-   */
-  void setIterateSingleContext();
 }

src/main/java/io/ebeaninternal/server/core/timezone/MySqlDataTimeZone.java

@@ -5,11 +5,11 @@ import java.util.Calendar;
 /**
  * Implementation of DataTimeZone when single Calendar instance is used with local timezone.
  */
-public class LocalDataTimeZone implements DataTimeZone {
+public class MySqlDataTimeZone implements DataTimeZone {
 
   protected final Calendar zone;
 
-  public LocalDataTimeZone() {
+  public MySqlDataTimeZone() {
     this.zone = Calendar.getInstance();
   }
 
@@ -19,7 +19,7 @@ public class LocalDataTimeZone implements DataTimeZone {
   }
 
   @Override
-    public Calendar getDateTimeZone() {
-      return zone; // workaround for MySQL. TODO: rename class to MySqlDataTimeZone!?
-    }
+  public Calendar getDateTimeZone() {
+    return zone;
+  }
 }

src/main/java/io/ebeaninternal/server/core/timezone/OracleDataTimeZone.java

@@ -8,9 +8,9 @@ import java.util.Calendar;
  * Used with Oracle JDBC driver as that wants to mutate the Calender.
  * </p>
  */
-public class CloneDataTimeZone extends SimpleDataTimeZone {
+public class OracleDataTimeZone extends SimpleDataTimeZone {
 
-  public CloneDataTimeZone(String zoneId) {
+  public OracleDataTimeZone(String zoneId) {
     super(zoneId);
   }
 

src/main/java/io/ebeaninternal/server/deploy/BeanDescriptor.java

@@ -105,7 +105,6 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -219,9 +218,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
 
   private final BeanProperty draftDirty;
 
-  /**
-   * Map of BeanProperty Linked so as to preserve order.
-   */
   private final LinkedHashMap<String, BeanProperty> propMap;
 
   /**
@@ -234,44 +230,17 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    */
   private final Map<String, BeanPropertyAssoc<?>> tablePath = new HashMap<>();
 
-  /**
-   * The type of bean this describes.
-   */
   final Class<T> beanType;
-
   final Class<?> rootBeanType;
-
-  /**
-   * This is not sent to a remote client.
-   */
   private final BeanDescriptorMap owner;
-
-
   final String[] properties;
 
-  /**
-   * Intercept pre post on insert,update, and delete .
-   */
-  private volatile BeanPersistController persistController;
-
   private final BeanPostLoad beanPostLoad;
   private final BeanPostConstructListener beanPostConstructListener;
-
-  /**
-   * Listens for post commit insert update and delete events.
-   */
+  private volatile BeanPersistController persistController;
   private volatile BeanPersistListener persistListener;
-
   private final BeanQueryAdapter queryAdapter;
-
-  /**
-   * If set overrides the find implementation. Server side only.
-   */
   private final BeanFindController beanFinder;
-
-  /**
-   * Used for fine grain filtering for the change log.
-   */
   private final ChangeLogFilter changeLogFilter;
 
   /**
@@ -281,22 +250,12 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
 
   private final boolean abstractType;
 
-  /**
-   * Derived list of properties that make up the unique id.
-   */
   private final BeanProperty idProperty;
-
   private final int idPropertyIndex;
 
-  /**
-   * Derived list of properties that are used for version concurrency checking.
-   */
   private final BeanProperty versionProperty;
-
   private final int versionPropertyIndex;
-
   private final BeanProperty whenModifiedProperty;
-
   private final BeanProperty whenCreatedProperty;
 
   /**
@@ -313,14 +272,9 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Scalar mutable properties (need to dirty check on update).
    */
   private final BeanProperty[] propertiesMutable;
-
-
   private final BeanPropertyAssocOne<?> unidirectional;
   private final BeanProperty orderColumn;
 
-  /**
-   * list of properties that are Lists/Sets/Maps (Derived).
-   */
   private final BeanProperty[] propertiesNonMany;
   private final BeanProperty[] propertiesAggregate;
   private final BeanPropertyAssocMany<?>[] propertiesMany;
@@ -332,25 +286,14 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * list of properties that are associated beans and not embedded (Derived).
    */
   private final BeanPropertyAssocOne<?>[] propertiesOne;
-
   private final BeanPropertyAssocOne<?>[] propertiesOneImported;
   private final BeanPropertyAssocOne<?>[] propertiesOneImportedSave;
   private final BeanPropertyAssocOne<?>[] propertiesOneImportedDelete;
-
-  //private final BeanPropertyAssocOne<?>[] propertiesOneExported;
   private final BeanPropertyAssocOne<?>[] propertiesOneExportedSave;
   private final BeanPropertyAssocOne<?>[] propertiesOneExportedDelete;
-
-  /**
-   * list of properties that are embedded beans.
-   */
   private final BeanPropertyAssocOne<?>[] propertiesEmbedded;
 
-  /**
-   * List of the scalar properties excluding id and secondary table properties.
-   */
   private final BeanProperty[] propertiesBaseScalar;
-
   private final BeanProperty[] propertiesTransient;
 
   /**
@@ -382,11 +325,8 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   private final EntityBean prototypeEntityBean;
 
   private final IdBinder idBinder;
-
   private String idBinderInLHSSql;
-
   private String idBinderIdSql;
-
   private String deleteByIdSql;
   private String deleteByIdInSql;
   private String whereIdInSql;
@@ -394,29 +334,19 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   private String softDeleteByIdInSql;
 
   private final String name;
-
   private final String baseTableAlias;
-
   private final boolean cacheSharableBeans;
-
   private final String docStoreQueueId;
-
   private final BeanDescriptorDraftHelp<T> draftHelp;
   private final BeanDescriptorCacheHelp<T> cacheHelp;
   private final BeanDescriptorJsonHelp<T> jsonHelp;
   private DocStoreBeanAdapter<T> docStoreAdapter;
   private DocumentMapping docMapping;
   private boolean docStoreEmbeddedInvalidation;
-
   private final String defaultSelectClause;
-
   private SpiEbeanServer ebeanServer;
 
-  /**
-   * Construct the BeanDescriptor.
-   */
   public BeanDescriptor(BeanDescriptorMap owner, DeployBeanDescriptor<T> deploy) {
-
     this.owner = owner;
     this.multiValueSupported = owner.isMultiValueSupported();
     this.entityType = deploy.getEntityType();
@@ -431,7 +361,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.namedQuery = deploy.getNamedQuery();
     this.namedRawSql = deploy.getNamedRawSql();
     this.inheritInfo = deploy.getInheritInfo();
-
     this.beanFinder = deploy.getBeanFinder();
     this.persistController = deploy.getPersistController();
     this.persistListener = deploy.getPersistListener();
@@ -439,7 +368,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.beanPostLoad = deploy.getPostLoad();
     this.queryAdapter = deploy.getQueryAdapter();
     this.changeLogFilter = deploy.getChangeLogFilter();
-
     this.defaultSelectClause = deploy.getDefaultSelectClause();
     this.identityMode = deploy.buildIdentityMode();
     this.idType = identityMode.getIdType();
@@ -449,7 +377,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.selectLastInsertedIdDraft = deploy.getSelectLastInsertedIdDraft();
     this.concurrencyMode = deploy.getConcurrencyMode();
     this.indexDefinitions = deploy.getIndexDefinitions();
-
     this.readAuditing = deploy.isReadAuditing();
     this.draftable = deploy.isDraftable();
     this.draftableElement = deploy.isDraftableElement();
@@ -464,10 +391,8 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.partitionMeta = deploy.getPartitionMeta();
     this.storageEngine = deploy.getStorageEngine();
     this.autoTunable = beanFinder == null && (entityType == EntityType.ORM || entityType == EntityType.VIEW);
-
     // helper object used to derive lists of properties
     DeployBeanPropertyLists listHelper = new DeployBeanPropertyLists(owner, this, deploy);
-
     this.softDeleteProperty = listHelper.getSoftDeleteProperty();
     // if formula is set, the property is virtual only (there is no column in db) the formula must evaluate to true,
     // if there is a join to a deleted bean. Example: '@Formula(select = "${ta}.user_id is null")'
@@ -503,22 +428,17 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.propertiesGenInsert = listHelper.getGeneratedInsert();
     this.propertiesGenUpdate = listHelper.getGeneratedUpdate();
     this.idOnlyReference = isIdOnlyReference(propertiesBaseScalar);
-
     boolean noRelationships = propertiesOne.length + propertiesMany.length == 0;
-
     this.cacheSharableBeans = noRelationships && deploy.getCacheOptions().isReadOnly();
     this.cacheHelp = new BeanDescriptorCacheHelp<>(this, owner.getCacheManager(), deploy.getCacheOptions(), cacheSharableBeans, propertiesOneImported);
     this.jsonHelp = new BeanDescriptorJsonHelp<>(this);
     this.draftHelp = new BeanDescriptorDraftHelp<>(this);
-
     this.docStoreAdapter = owner.createDocStoreBeanAdapter(this, deploy);
     this.docStoreQueueId = docStoreAdapter.getQueueId();
-
     // Check if there are no cascade save associated beans ( subject to change
     // in initialiseOther()). Note that if we are in an inheritance hierarchy
     // then we also need to check every BeanDescriptors in the InheritInfo as
     // well. We do that later in initialiseOther().
-
     saveRecurseSkippable = (0 == (propertiesOneExportedSave.length + propertiesOneImportedSave.length + propertiesManySave.length));
 
     // Check if there are no cascade delete associated beans (also subject to
@@ -529,7 +449,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     this.idBinder = owner.createIdBinder(idProperty);
     this.whenModifiedProperty = findWhenModifiedProperty();
     this.whenCreatedProperty = findWhenCreatedProperty();
-
     // derive the index position of the Id and Version properties
     this.abstractType = Modifier.isAbstract(beanType.getModifiers());
     if (abstractType) {
@@ -537,7 +456,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
       this.versionPropertyIndex = -1;
       this.unloadProperties = new int[0];
       this.propertiesIndex = new BeanProperty[0];
-
     } else {
       EntityBeanIntercept ebi = prototypeEntityBean._ebean_getIntercept();
       this.idPropertyIndex = (idProperty == null) ? -1 : ebi.findProperty(idProperty.getName());
@@ -568,23 +486,19 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * These properties need to be unloaded when populating beans for queries.
    */
   private int[] derivePropertiesToUnload(EntityBean prototypeEntityBean) {
-
     boolean[] loaded = prototypeEntityBean._ebean_getIntercept().getLoaded();
     int[] props = new int[loaded.length];
     int pos = 0;
-
     // collect the positions of the properties initialised in the default constructor.
     for (int i = 0; i < loaded.length; i++) {
       if (loaded[i]) {
         props[pos++] = i;
       }
     }
-
     if (pos == 0) {
       // nothing set in the constructor
       return new int[0];
     }
-
     // populate a smaller/minimal array
     int[] unload = new int[pos];
     System.arraycopy(props, 0, unload, 0, pos);
@@ -665,14 +579,11 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * These properties need to be initialised prior to the association properties
    * as they are used to get the imported and exported properties.
-   * </p>
    */
   void initialiseId(BeanDescriptorInitContext initContext) {
-
     if (logger.isTraceEnabled()) {
       logger.trace("BeanDescriptor initialise " + fullName);
     }
-
     if (draftable) {
       initContext.addDraft(baseTable, draftTable);
     }
@@ -680,7 +591,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
       // add mapping (used to swap out baseTable for asOf queries)
       initContext.addHistory(baseTable, baseTableAsOf);
     }
-
     if (inheritInfo != null) {
       inheritInfo.setDescriptor(this);
     }
@@ -695,19 +605,17 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Initialise the exported and imported parts for associated properties.
    */
   public void initialiseOther(BeanDescriptorInitContext initContext) {
-
     for (BeanPropertyAssocMany<?> many : propertiesManyToMany) {
       // register associated draft table for M2M intersection
       many.registerDraftIntersectionTable(initContext);
     }
-
     if (historySupport) {
       // history support on this bean so check all associated intersection tables
       // and if they are not excluded register the associated 'with history' table
-      for (BeanPropertyAssocMany<?> aPropertiesManyToMany : propertiesManyToMany) {
+      for (BeanPropertyAssocMany<?> manyToMany : propertiesManyToMany) {
         // register associated history table for M2M intersection
-        if (!aPropertiesManyToMany.isExcludedFromHistory()) {
-          TableJoin intersectionTableJoin = aPropertiesManyToMany.getIntersectionTableJoin();
+        if (!manyToMany.isExcludedFromHistory()) {
+          TableJoin intersectionTableJoin = manyToMany.getIntersectionTableJoin();
           initContext.addHistoryIntersection(intersectionTableJoin.getTable());
         }
       }
@@ -730,11 +638,9 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     idBinderIdSql = idBinder.getBindIdSql(baseTableAlias);
     String idBinderInLHSSqlNoAlias = idBinder.getBindIdInSql(null);
     String idEqualsSql = idBinder.getBindIdSql(null);
-
     deleteByIdSql = "delete from " + baseTable + " where " + idEqualsSql;
     whereIdInSql = " where " + idBinderInLHSSqlNoAlias + " ";
     deleteByIdInSql = "delete from " + baseTable + whereIdInSql;
-
     if (softDelete) {
       softDeleteByIdSql = "update " + baseTable + " set " + getSoftDeleteDbSet() + " where " + idEqualsSql;
       softDeleteByIdInSql = "update " + baseTable + " set " + getSoftDeleteDbSet() + " where " + idBinderInLHSSqlNoAlias + " ";
@@ -765,7 +671,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     return false;
   }
 
-  boolean hasCircularImportedIdTo(BeanDescriptor sourceDesc) {
+  boolean hasCircularImportedIdTo(BeanDescriptor<?> sourceDesc) {
     for (BeanPropertyAssocOne<?> assocOne : propertiesOneImportedSave) {
       if (assocOne.getTargetDescriptor() == sourceDesc) {
         return true;
@@ -792,7 +698,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Perform last initialisation for the descriptor.
    */
   void initLast() {
-
     for (BeanProperty prop : propertiesNonTransient) {
       if (prop.isUnique()) {
         propertiesUnique.add(new BeanProperty[]{prop});
@@ -895,13 +800,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   public void merge(EntityBean bean, EntityBean existing) {
-
     EntityBeanIntercept fromEbi = bean._ebean_getIntercept();
     EntityBeanIntercept toEbi = existing._ebean_getIntercept();
-
     int propertyLength = toEbi.getPropertyLength();
     String[] names = getProperties();
-
     for (int i = 0; i < propertyLength; i++) {
 
       if (fromEbi.isLoadedProperty(i)) {
@@ -977,14 +879,11 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Return the bean change for an update generating 'new values' and 'old values' in JSON form.
    */
   private BeanChange updateBeanChange(PersistRequestBean<T> request) {
-
     try {
       BeanChangeJson changeJson = new BeanChangeJson(this, request.isStatelessUpdate());
       request.getEntityBeanIntercept().addDirtyPropertyValues(changeJson);
       changeJson.flush();
-
       return beanChange(ChangeType.UPDATE, request.getBeanId(), changeJson.newJson(), changeJson.oldJson());
-
     } catch (RuntimeException e) {
       logger.error("Failed to write ChangeLog entry for update", e);
       return null;
@@ -995,16 +894,12 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Return the bean change for an insert.
    */
   private BeanChange insertBeanChange(PersistRequestBean<T> request) {
-
     try {
       StringWriter writer = new StringWriter(200);
       SpiJsonWriter jsonWriter = createJsonWriter(writer);
-
       jsonWriteForInsert(jsonWriter, request.getEntityBean());
       jsonWriter.flush();
-
       return beanChange(ChangeType.INSERT, request.getBeanId(), writer.toString(), null);
-
     } catch (IOException e) {
       logger.error("Failed to write ChangeLog entry for insert", e);
       return null;
@@ -1063,12 +958,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * concurrency checking.
    */
   private SqlUpdate deleteByIdList(List<Object> idList, DeleteMode mode) {
-
     String baseSql = mode.isHard() ? deleteByIdInSql : softDeleteByIdInSql;
     StringBuilder sb = new StringBuilder(baseSql);
     String inClause = idBinder.getIdInValueExprDelete(idList.size());
     sb.append(inClause);
-
     DefaultSqlUpdate delete = new DefaultSqlUpdate(sb.toString());
     idBinder.addIdInBindValues(delete, idList);
     return delete;
@@ -1079,15 +972,12 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * concurrency checking.
    */
   private SqlUpdate deleteById(Object id, DeleteMode mode) {
-
     String baseSql = mode.isHard() ? deleteByIdSql : softDeleteByIdSql;
     DefaultSqlUpdate sqlDelete = new DefaultSqlUpdate(baseSql);
-
     Object[] bindValues = idBinder.getBindValues(id);
     for (Object bindValue : bindValues) {
       sqlDelete.setParameter(bindValue);
     }
-
     return sqlDelete;
   }
 
@@ -1100,9 +990,9 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   void initialiseFkeys() {
-    for (BeanPropertyAssocOne<?> aPropertiesOneImported : propertiesOneImported) {
-      if (!aPropertiesOneImported.isFormula()) {
-        aPropertiesOneImported.addFkey();
+    for (BeanPropertyAssocOne<?> oneImported : propertiesOneImported) {
+      if (!oneImported.isFormula()) {
+        oneImported.addFkey();
       }
     }
   }
@@ -1210,12 +1100,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Build the Document mapping recursively with the given prefix relative to the root of the document.
    */
   public void docStoreMapping(final DocMappingBuilder mapping, final String prefix) {
-
     if (prefix != null && idProperty != null) {
       // id property not included in the
       idProperty.docStoreMapping(mapping, prefix);
     }
-
     if (inheritInfo != null) {
       String discCol = inheritInfo.getDiscriminatorColumn();
       if (Types.VARCHAR == inheritInfo.getDiscriminatorType()) {
@@ -1702,13 +1590,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Trim query plans not used since the passed in epoch time.
    */
   void trimQueryPlans(long unusedSince) {
-    Iterator<CQueryPlan> it = queryPlanCache.values().iterator();
-    while (it.hasNext()) {
-      CQueryPlan queryPlan = it.next();
-      if (queryPlan.getLastQueryTime() < unusedSince) {
-        it.remove();
-      }
-    }
+    queryPlanCache.values().removeIf(queryPlan -> queryPlan.getLastQueryTime() < unusedSince);
   }
 
   /**
@@ -1804,9 +1686,9 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Find a property annotated with @WhenCreated or @CreatedTimestamp.
    */
   private BeanProperty findWhenCreatedProperty() {
-    for (BeanProperty aPropertiesBaseScalar : propertiesBaseScalar) {
-      if (aPropertiesBaseScalar.isGeneratedWhenCreated()) {
-        return aPropertiesBaseScalar;
+    for (BeanProperty baseScalar : propertiesBaseScalar) {
+      if (baseScalar.isGeneratedWhenCreated()) {
+        return baseScalar;
       }
     }
     return null;
@@ -1816,10 +1698,9 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Find a property annotated with @WhenModified or @UpdatedTimestamp.
    */
   private BeanProperty findWhenModifiedProperty() {
-
-    for (BeanProperty aPropertiesBaseScalar : propertiesBaseScalar) {
-      if (aPropertiesBaseScalar.isGeneratedWhenModified()) {
-        return aPropertiesBaseScalar;
+    for (BeanProperty baseScalar : propertiesBaseScalar) {
+      if (baseScalar.isGeneratedWhenModified()) {
+        return baseScalar;
       }
     }
     return null;
@@ -1829,14 +1710,12 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Return the many property included in the query or null if one is not.
    */
   public BeanPropertyAssocMany<?> getManyProperty(SpiQuery<?> query) {
-
     OrmQueryDetail detail = query.getDetail();
-    for (BeanPropertyAssocMany<?> aPropertiesMany : propertiesMany) {
-      if (detail.includesPath(aPropertiesMany.getName())) {
-        return aPropertiesMany;
+    for (BeanPropertyAssocMany<?> many : propertiesMany) {
+      if (detail.includesPath(many.getName())) {
+        return many;
       }
     }
-
     return null;
   }
 
@@ -1905,7 +1784,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Bind the idValue to the preparedStatement.
    * <p>
    * This takes care of the various id types such as embedded beans etc.
-   * </p>
    */
   public void bindId(DataBind dataBind, Object idValue) throws SQLException {
     idBinder.bindId(dataBind, idValue);
@@ -1915,7 +1793,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Return the id as an array of scalar bindable values.
    * <p>
    * This 'flattens' any EmbeddedId or multiple Id property cases.
-   * </p>
    */
   public Object[] getBindIdValues(Object idValue) {
     return idBinder.getBindValues(idValue);
@@ -1940,7 +1817,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
     }
     try {
       EntityBean bean = (EntityBean) prototypeEntityBean._ebean_newInstance();
-
       if (beanPostConstructListener != null) {
         beanPostConstructListener.autowire(bean); // calls all registered listeners
         beanPostConstructListener.postConstruct(bean); // calls first the @PostConstruct method and then the listeners
@@ -1959,7 +1835,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
         }
       }
       return bean;
-
     } catch (Exception ex) {
       throw new PersistenceException(ex);
     }
@@ -1999,7 +1874,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    */
   @SuppressWarnings("unchecked")
   public T createReference(Boolean readOnly, boolean disableLazyLoad, Object id, PersistenceContext pc) {
-
     if (cacheSharableBeans && !disableLazyLoad && !Boolean.FALSE.equals(readOnly)) {
       CachedBeanData d = cacheHelp.beanCacheGetData(cacheKey(id));
       if (d != null) {
@@ -2016,10 +1890,8 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
       if (inheritInfo != null && !inheritInfo.isConcrete()) {
         return findReferenceBean(id, pc);
       }
-
       EntityBean eb = createEntityBean();
       id = convertSetId(id, eb);
-
       EntityBeanIntercept ebi = eb._ebean_getIntercept();
       if (disableLazyLoad) {
         ebi.setDisableLazyLoad(true);
@@ -2034,9 +1906,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
         contextPut(pc, id, eb);
         ebi.setPersistenceContext(pc);
       }
-
       return (T) eb;
-
     } catch (Exception ex) {
       throw new PersistenceException(ex);
     }
@@ -2086,14 +1956,12 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   public BeanProperty findPropertyFromPath(String path) {
     BeanDescriptor<?> other = this;
     while (true) {
-
       String[] split = SplitName.splitBegin(path);
       if (split[1] == null) {
         return other._findBeanProperty(split[0]);
       }
       BeanPropertyAssoc<?> assocProp = (BeanPropertyAssoc<?>) other._findBeanProperty(split[0]);
       BeanDescriptor<?> targetDesc = assocProp.getTargetDescriptor();
-
       path = split[1];
       other = targetDesc;
     }
@@ -2114,13 +1982,11 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
         return result;
       }
       String[] splitBegin = SplitName.splitBegin(path);
-
       BeanProperty beanProperty = result.findProperty(splitBegin[0]);
       if (beanProperty instanceof BeanPropertyAssoc<?>) {
         BeanPropertyAssoc<?> assocProp = (BeanPropertyAssoc<?>) beanProperty;
         path = splitBegin[1];
         result = assocProp.getTargetDescriptor();
-
       } else {
         throw new PersistenceException("Invalid path " + path + " from " + result.getFullName());
       }
@@ -2147,7 +2013,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * For bidirectional this is a real property on the bean. For unidirectional
    * relationships we have this 'shadow' property which is not externally
    * visible.
-   * </p>
    */
   public BeanPropertyAssocOne<?> getUnidirectional() {
     BeanDescriptor<?> other = this;
@@ -2168,7 +2033,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * If this is false and the Id is null it is assumed that a database auto
    * increment feature is being used to populate the id.
-   * </p>
    */
   public boolean isUseIdGenerator() {
     return idGenerator != null;
@@ -2195,7 +2059,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * If this BeanDescriptor is for a table then this returns the table name
    * instead.
-   * </p>
    */
   @Override
   @Nonnull
@@ -2315,7 +2178,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Return the Id value for the bean with embeddedId beans converted into maps.
    * <p>
    * The usage is to provide simple id types for JSON processing (for embeddedId's).
-   * </p>
    */
   public Object getIdForJson(Object bean) {
     return idBinder.getIdForJson((EntityBean) bean);
@@ -2325,7 +2187,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Convert the idValue assuming embeddedId values are Maps.
    * <p>
    * The usage is to provide simple id types for JSON processing (for embeddedId's).
-   * </p>
    */
   Object convertIdFromJson(Object idValue) {
     return idBinder.convertIdFromJson(idValue);
@@ -2359,7 +2220,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * If the bean is not null, the id value is set to the id property of the bean
    * after it has been converted to the correct type.
-   * </p>
    */
   public Object convertSetId(Object idValue, EntityBean bean) {
     return idBinder.convertSetId(idValue, bean);
@@ -2385,9 +2245,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   public void sort(List<T> list, String sortByClause) {
-
-    ElComparator<T> comparator = getElComparator(sortByClause);
-    list.sort(comparator);
+    list.sort(getElComparator(sortByClause));
   }
 
   public ElComparator<T> getElComparator(String propNameOrSortBy) {
@@ -2398,10 +2256,8 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Register all the assoc many properties on this bean that are not populated with the load context.
    * <p>
    * This provides further lazy loading via the load context.
-   * </p>
    */
   public void lazyLoadRegister(String prefix, EntityBeanIntercept ebi, EntityBean bean, LoadContext loadContext) {
-
     // load the List/Set/Map proxy objects (deferred fetching of lists)
     BeanPropertyAssocMany<?>[] manys = propertiesMany();
     for (BeanPropertyAssocMany<?> many : manys) {
@@ -2420,12 +2276,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * define a Reference for the collection and not invoke a query.
    */
   public boolean lazyLoadMany(EntityBeanIntercept ebi) {
-
     int lazyLoadProperty = ebi.getLazyLoadPropertyIndex();
     if (lazyLoadProperty == -1) {
       return false;
     }
-
     if (inheritInfo != null) {
       return descOf(ebi.getOwner().getClass()).lazyLoadMany(ebi, lazyLoadProperty);
     }
@@ -2443,7 +2297,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Check for lazy loading of many property.
    */
   private boolean lazyLoadMany(EntityBeanIntercept ebi, int lazyLoadProperty) {
-
     BeanProperty lazyLoadBeanProp = propertiesIndex[lazyLoadProperty];
     if (lazyLoadBeanProp instanceof BeanPropertyAssocMany<?>) {
       BeanPropertyAssocMany<?> manyProp = (BeanPropertyAssocMany<?>) lazyLoadBeanProp;
@@ -2468,7 +2321,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    */
   @SuppressWarnings("unchecked")
   private ElComparator<T> createComparator(String sortByClause) {
-
     SortByClause sortBy = SortByClauseParser.parse(sortByClause);
     if (sortBy.size() == 1) {
       // simple comparator for a single property
@@ -2477,24 +2329,20 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
 
     // create a compound comparator based on the list of properties
     ElComparator<T>[] comparators = new ElComparator[sortBy.size()];
-
     List<SortByClause.Property> sortProps = sortBy.getProperties();
     for (int i = 0; i < sortProps.size(); i++) {
       SortByClause.Property sortProperty = sortProps.get(i);
       comparators[i] = createPropertyComparator(sortProperty);
     }
-
     return new ElComparatorCompound<>(comparators);
   }
 
   private ElComparator<T> createPropertyComparator(SortByClause.Property sortProp) {
-
     ElPropertyValue elGetValue = getElGetValue(sortProp.getName());
     if (elGetValue == null) {
       logger.error("Sort property [" + sortProp + "] not found in " + beanType + ". Cannot sort.");
       return new ElComparatorNoop<>();
     }
-
     if (elGetValue.isAssocMany()) {
       logger.error("Sort property [" + sortProp + "] in " + beanType + " is a many-property. Cannot sort.");
       return new ElComparatorNoop<>();
@@ -2539,7 +2387,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Similar to ElPropertyValue but also uses foreign key shortcuts.
    * <p>
    * The foreign key shortcuts means we can avoid unnecessary joins.
-   * </p>
    */
   public ElPropertyDeploy getElPropertyDeploy(String propName) {
     ElPropertyDeploy elProp = elDeployCache.get(propName);
@@ -2560,7 +2407,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   ElPropertyValue buildElGetValue(String propName, ElPropertyChainBuilder chain, boolean propertyDeploy) {
-
     if (propertyDeploy && chain != null) {
       ElPropertyDeploy fk = elDeployCache.get(propName);
       if (fk instanceof BeanFkeyProperty) {
@@ -2568,17 +2414,14 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
         return ((BeanFkeyProperty) fk).create(chain.getExpression(), chain.isContainsMany());
       }
     }
-
     int basePos = propName.indexOf('.');
     if (basePos > -1) {
       // nested or embedded property
       String baseName = propName.substring(0, basePos);
-
       BeanProperty assocProp = _findBeanProperty(baseName);
       if (assocProp == null) {
         return null;
       }
-
       String remainder = propName.substring(basePos + 1);
       return assocProp.buildElPropertyValue(propName, remainder, chain, propertyDeploy);
     }
@@ -2639,7 +2482,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * This searches this BeanDescriptor and then searches further down the
    * inheritance tree (not up).
-   * </p>
    */
   @Override
   public BeanProperty findProperty(String propName) {
@@ -2666,11 +2508,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Reset the many properties to empty state ready for reloading.
    */
   public void resetManyProperties(Object dbBean) {
-
     EntityBean bean = (EntityBean) dbBean;
-    for (BeanPropertyAssocMany<?> aPropertiesMany : propertiesMany) {
-      if (aPropertiesMany.isCascadeRefresh()) {
-        aPropertiesMany.resetMany(bean);
+    for (BeanPropertyAssocMany<?> many : propertiesMany) {
+      if (many.isCascadeRefresh()) {
+        many.resetMany(bean);
       }
     }
   }
@@ -2680,7 +2521,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * This means is has no relationships and has readOnly=true in its cache
    * options.
-   * </p>
    */
   public boolean isCacheSharableBeans() {
     return cacheSharableBeans;
@@ -2781,8 +2621,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * De-register the BeanPersistListener.
    */
   public void deregister(BeanPersistListener listener) {
-
-    // volatile read...
     BeanPersistListener currentListener = persistListener;
     if (currentListener != null) {
       if (currentListener instanceof ChainedBeanPersistListener) {
@@ -2798,8 +2636,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * De-register the BeanPersistController.
    */
   public void deregister(BeanPersistController controller) {
-
-    // volatile read...
     BeanPersistController currentController = persistController;
     if (currentController != null) {
       if (currentController instanceof ChainedBeanPersistController) {
@@ -2815,9 +2651,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Register the new BeanPersistController.
    */
   public void register(BeanPersistListener newPersistListener) {
-
     if (newPersistListener.isRegisterFor(beanType)) {
-      // volatile read...
       BeanPersistListener currentListener = persistListener;
       if (currentListener == null) {
         persistListener = newPersistListener;
@@ -2837,18 +2671,14 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Register the new BeanPersistController.
    */
   public void register(BeanPersistController newController) {
-
     if (newController.isRegisterFor(beanType)) {
-      // volatile read...
       BeanPersistController currentController = persistController;
       if (currentController == null) {
         persistController = newController;
       } else {
         if (currentController instanceof ChainedBeanPersistController) {
-          // add it to the existing chain
           persistController = ((ChainedBeanPersistController) currentController).register(newController);
         } else {
-          // build new chain of the 2
           persistController = new ChainedBeanPersistController(currentController, newController);
         }
       }
@@ -2901,17 +2731,13 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
 
   /**
    * Return the dependent tables for a view based entity.
-   * <p>
-   * These tables
-   * </p>
    */
   public String[] getDependentTables() {
     return dependentTables;
   }
 
   /**
-   * Return the base table. Only properties mapped to the base table are by
-   * default persisted.
+   * Return the base table. Only properties mapped to the base table are by default persisted.
    */
   @Override
   public String getBaseTable() {
@@ -3012,7 +2838,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
 
   @Override
   public ExtraJoin extraJoin(String propertyPath) {
-
     ElPropertyValue elGetValue = getElGetValue(propertyPath);
     if (elGetValue != null) {
       BeanProperty beanProperty = elGetValue.getBeanProperty();
@@ -3150,7 +2975,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * This is only used with Identity columns and getGeneratedKeys is not
    * supported.
-   * </p>
    */
   public String getSelectLastInsertedId(boolean publish) {
     return publish ? selectLastInsertedId : selectLastInsertedIdDraft;
@@ -3198,8 +3022,7 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   /**
-   * Return the beans that are embedded. These share the base table with the
-   * owner bean.
+   * Return the beans that are embedded. These share the base table with the owner bean.
    */
   public BeanPropertyAssocOne<?>[] propertiesEmbedded() {
     return propertiesEmbedded;
@@ -3252,12 +3075,10 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * @param insertMode true if the 'root request' was an insert rather than an update
    */
   public boolean isInsertMode(EntityBeanIntercept ebi, boolean insertMode) {
-
     if (ebi.isLoaded()) {
       // must be an update as the bean is loaded
       return false;
     }
-
     if (idProperty.isEmbedded()) {
       // not using Id generator so just base on isLoaded()
       return !ebi.isLoaded();
@@ -3329,7 +3150,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
   }
 
   public ConcurrencyMode getConcurrencyMode(EntityBeanIntercept ebi) {
-
     if (!hasVersionProperty(ebi)) {
       return ConcurrencyMode.NONE;
     } else {
@@ -3350,15 +3170,14 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Populate the diff for updates with flattened non-null property values.
    */
   public void diff(String prefix, Map<String, ValuePair> map, EntityBean newBean, EntityBean oldBean) {
-
-    for (BeanProperty aPropertiesBaseScalar : propertiesBaseScalar) {
-      aPropertiesBaseScalar.diff(prefix, map, newBean, oldBean);
+    for (BeanProperty baseScalar : propertiesBaseScalar) {
+      baseScalar.diff(prefix, map, newBean, oldBean);
     }
-    for (BeanPropertyAssocOne<?> aPropertiesOne : propertiesOne) {
-      aPropertiesOne.diff(prefix, map, newBean, oldBean);
+    for (BeanPropertyAssocOne<?> one : propertiesOne) {
+      one.diff(prefix, map, newBean, oldBean);
     }
-    for (BeanPropertyAssocOne<?> aPropertiesEmbedded : propertiesEmbedded) {
-      aPropertiesEmbedded.diff(prefix, map, newBean, oldBean);
+    for (BeanPropertyAssocOne<?> embedded : propertiesEmbedded) {
+      embedded.diff(prefix, map, newBean, oldBean);
     }
   }
 
@@ -3368,10 +3187,8 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * <p>
    * This is primarily used for paging queries to ensure that an order by clause is provided and that the order by
    * provides unique ordering of the rows (so that the paging is predicable).
-   * </p>
    */
   public void appendOrderById(SpiQuery<T> query) {
-
     if (idProperty != null && !idProperty.isEmbedded() && !query.order().containsProperty(idProperty.getName())) {
       query.order().asc(idProperty.getName());
     }
@@ -3409,7 +3226,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * Returns ManyToOnes and OneToOnes on the imported owning side.
    * <p>
    * Excludes OneToOnes on the exported side.
-   * </p>
    */
   public BeanPropertyAssocOne<?>[] propertiesOneImported() {
     return propertiesOneImported;
@@ -3483,7 +3299,6 @@ public class BeanDescriptor<T> implements BeanType<T>, STreeType {
    * no version property exists on the bean.
    * <p>
    * Note that this DOES NOT find a version property on an embedded bean.
-   * </p>
    */
   public BeanProperty getVersionProperty() {
     return versionProperty;

src/main/java/io/ebeaninternal/server/deploy/BeanDescriptorManager.java

@@ -44,9 +44,9 @@ import io.ebeaninternal.server.deploy.meta.DeployBeanPropertyAssoc;
 import io.ebeaninternal.server.deploy.meta.DeployBeanPropertyAssocMany;
 import io.ebeaninternal.server.deploy.meta.DeployBeanPropertyAssocOne;
 import io.ebeaninternal.server.deploy.meta.DeployBeanTable;
+import io.ebeaninternal.server.deploy.meta.DeployIdentityMode;
 import io.ebeaninternal.server.deploy.meta.DeployOrderColumn;
 import io.ebeaninternal.server.deploy.meta.DeployTableJoin;
-import io.ebeaninternal.server.deploy.meta.DeployIdentityMode;
 import io.ebeaninternal.server.deploy.parse.DeployBeanInfo;
 import io.ebeaninternal.server.deploy.parse.DeployCreateProperties;
 import io.ebeaninternal.server.deploy.parse.DeployInherit;
@@ -245,7 +245,7 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
    * Run periodic trim of query plans.
    */
   public void scheduleBackgroundTrim() {
-    backgroundExecutor.executePeriodically(this::trimQueryPlans, 60L, TimeUnit.SECONDS);
+    backgroundExecutor.executePeriodically(this::trimQueryPlans, 117L, 60L, TimeUnit.SECONDS);
   }
 
   private void trimQueryPlans() {
@@ -357,7 +357,6 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
    * Deploy returning the asOfTableMap (which is required by the SQL builders).
    */
   public Map<String, String> deploy(List<XmEbean> mappings) {
-
     try {
       createListeners();
       readEntityDeploymentInitial();
@@ -365,7 +364,6 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
       readEntityBeanTable();
       readEntityDeploymentAssociations();
       readInheritedIdGenerators();
-      setProfileIds();
       // creates the BeanDescriptors
       readEntityRelationships();
 
@@ -375,9 +373,7 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
 
       initialiseAll();
       readForeignKeys();
-
       readTableToDescriptor();
-
       logStatus();
 
       // clear collections we no longer need
@@ -778,18 +774,6 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
     }
   }
 
-  /**
-   * Set profileIds based on descriptor full name order.
-   */
-  private void setProfileIds() {
-
-    List<? extends DeployBeanDescriptor<?>> deployDescriptors = deployInfoMap.values().stream()
-      .map(DeployBeanInfo::getDescriptor)
-      .collect(Collectors.toList());
-
-    deployDescriptors.sort(Comparator.comparing(DeployBeanDescriptor::getFullName));
-  }
-
   /**
    * Create the BeanTable from the deployment information gathered so far.
    */
@@ -1004,6 +988,14 @@ public class BeanDescriptorManager implements BeanDescriptorMap {
     orderProperty.setDbRead(true);
     orderProperty.setOwningType(targetDesc.getBeanType());
 
+    final InheritInfo targetInheritInfo = targetDesc.getInheritInfo();
+    if (targetInheritInfo != null) {
+      for (InheritInfo child : targetInheritInfo.getChildren()) {
+        final DeployBeanDescriptor<?> childDescriptor = deployInfoMap.get(child.getType()).getDescriptor();
+        childDescriptor.setOrderColumn(orderProperty);
+      }
+    }
+
     targetDesc.setOrderColumn(orderProperty);
   }
 

src/main/java/io/ebeaninternal/server/deploy/BeanProperty.java

@@ -542,12 +542,11 @@ public class BeanProperty implements ElPropertyValue, Property, STreeProperty {
     return dbEncryptFunction.getDecryptSql(propertyName);
   }
 
-  public String getDecryptSql() {
-    return dbEncryptFunction.getDecryptSql(this.getDbColumn());
-  }
-
-  private String getDecryptSql(String tableAlias) {
-    return dbEncryptFunction.getDecryptSql(tableAlias + "." + this.getDbColumn());
+  /**
+   * Return the SQL for the column including decryption function and column alias.
+   */
+  private String getDecryptSqlWithColumnAlias(String tableAlias) {
+    return dbEncryptFunction.getDecryptSql(tableAlias + "." + this.getDbColumn()) + " _e_" + tableAlias + "_" + this.getDbColumn();
   }
 
   @Override
@@ -600,8 +599,7 @@ public class BeanProperty implements ElPropertyValue, Property, STreeProperty {
       }
 
       if (dbEncrypted) {
-        String decryptSql = getDecryptSql(ctx.peekTableAlias());
-        ctx.appendRawColumn(decryptSql);
+        ctx.appendRawColumn(getDecryptSqlWithColumnAlias(ctx.peekTableAlias()));
         ctx.addEncryptedProp(this);
 
       } else {

src/main/java/io/ebeaninternal/server/deploy/id/IdBinderSimple.java

@@ -36,7 +36,6 @@ public final class IdBinderSimple implements IdBinder {
   @SuppressWarnings("rawtypes")
   private final ScalarType scalarType;
 
-
   public IdBinderSimple(BeanProperty idProperty, MultiValueBind multiValueBind) {
     this.idProperty = idProperty;
     this.scalarType = idProperty.getScalarType();
@@ -71,7 +70,6 @@ public final class IdBinderSimple implements IdBinder {
 
   @Override
   public void buildRawSqlSelectChain(String prefix, List<String> selectChain) {
-
     idProperty.buildRawSqlSelectChain(prefix, selectChain);
   }
 
@@ -218,7 +216,6 @@ public final class IdBinderSimple implements IdBinder {
 
   @Override
   public String getAssocOneIdExpr(String prefix, String operator) {
-
     StringBuilder sb = new StringBuilder();
     if (prefix != null) {
       sb.append(prefix);
@@ -231,7 +228,6 @@ public final class IdBinderSimple implements IdBinder {
 
   @Override
   public String getAssocIdInExpr(String prefix) {
-
     StringBuilder sb = new StringBuilder();
     if (prefix != null) {
       sb.append(prefix);
@@ -243,7 +239,6 @@ public final class IdBinderSimple implements IdBinder {
 
   @Override
   public Object convertId(Object idValue) {
-
     if (!idValue.getClass().equals(expectedType)) {
       return scalarType.toBeanType(idValue);
     }
@@ -252,12 +247,10 @@ public final class IdBinderSimple implements IdBinder {
 
   @Override
   public Object convertSetId(Object idValue, EntityBean bean) {
-
     if (!idValue.getClass().equals(expectedType)) {
       idValue = scalarType.toBeanType(idValue);
     }
     if (bean != null) {
-      // support PropertyChangeSupport
       idProperty.setValueIntercept(bean, idValue);
     }
     return idValue;

src/main/java/io/ebeaninternal/server/dto/DtoMappingRequest.java

@@ -50,4 +50,45 @@ public class DtoMappingRequest {
   public QueryPlanMetric createMetric() {
     return MetricFactory.get().createQueryPlanMetric(type, label, profileLocation, sql);
   }
+
+  /**
+   * Map all DB columns to setters.
+   */
+  DtoReadSet[] mapSetters(DtoMeta meta) {
+    DtoReadSet[] setterProps = new DtoReadSet[columnMeta.length];
+    for (int i = 0; i < columnMeta.length; i++) {
+      setterProps[i] = mapColumn(i, meta);
+    }
+    return setterProps;
+  }
+
+  /**
+   * Map DB columns after constructor to setters.
+   */
+  DtoReadSet[] mapArgPlusSetters(DtoMeta meta, int firstOnes) {
+    DtoReadSet[] setterProps = new DtoReadSet[columnMeta.length - firstOnes];
+    int pos = 0;
+    for (int i = firstOnes; i < columnMeta.length; i++) {
+      setterProps[pos++] = mapColumn(i, meta);
+    }
+    return setterProps;
+  }
+
+  private DtoReadSet mapColumn(int pos, DtoMeta meta) {
+    String label = columnMeta[pos].getLabel();
+    DtoReadSet property = meta.findProperty(label);
+    if (property == null || property.isReadOnly()) {
+      if (isRelaxedMode()) {
+        property = DtoReadSetColumnSkip.INSTANCE;
+      } else {
+        throw new IllegalStateException(unableToMapColumnMessage(columnMeta[pos], meta));
+      }
+    }
+    return property;
+  }
+
+  private String unableToMapColumnMessage(DtoColumn col, DtoMeta meta) {
+    return "Unable to map DB column " + col + " to a property with a setter method on " + meta.dtoType()+". Consider query.setRelaxedMode() to skip mapping this column.";
+  }
+
 }

src/main/java/io/ebeaninternal/server/dto/DtoMeta.java

@@ -72,55 +72,16 @@ class DtoMeta {
   }
 
   private DtoQueryPlanConPlus matchMaxArgPlusSetters(DtoMappingRequest request) {
-
-
-    int firstOnes = maxArgConstructor.getArgCount();
-
-    DtoColumn[] cols = request.getColumnMeta();
-
-    DtoReadSet[] setterProps = new DtoReadSet[cols.length - firstOnes];
-
-    int pos = 0;
-    for (int i = firstOnes; i < cols.length; i++) {
-      String label = cols[i].getLabel();
-      DtoReadSet property = findProperty(label);
-      if (property == null || property.isReadOnly()) {
-        if (request.isRelaxedMode()) {
-          property = DtoReadSetColumnSkip.INSTANCE;
-        } else {
-          throw new IllegalStateException("Unable to map DB column " + cols[i] + " to a property with a setter method on " + dtoType);
-        }
-      }
-      setterProps[pos++] = property;
-    }
-
+    DtoReadSet[] setterProps = request.mapArgPlusSetters(this, maxArgConstructor.getArgCount());
     return new DtoQueryPlanConPlus(request, maxArgConstructor, setterProps);
   }
 
   private DtoQueryPlan matchSetters(DtoMappingRequest request) {
-
-    DtoColumn[] cols = request.getColumnMeta();
-
-    DtoReadSet[] setterProps = new DtoReadSet[cols.length];
-
-    for (int i = 0; i < cols.length; i++) {
-      String label = cols[i].getLabel();
-      DtoReadSet property = findProperty(label);
-      if (property == null || property.isReadOnly()) {
-        if (request.isRelaxedMode()) {
-          property = DtoReadSetColumnSkip.INSTANCE;
-        } else {
-          throw new IllegalStateException("Unable to map DB column " + cols[i] + " to a property with a setter method on " + dtoType);
-        }
-      }
-      setterProps[i] = property;
-    }
-
+    DtoReadSet[] setterProps = request.mapSetters(this);
     return new DtoQueryPlanConSetter(request, defaultConstructor, setterProps);
   }
 
-  private DtoReadSet findProperty(String label) {
-
+  DtoReadSet findProperty(String label) {
     String upperLabel = label.toUpperCase();
     DtoMetaProperty property = propMap.get(upperLabel);
     if (property == null && upperLabel.startsWith("IS_")) {
@@ -131,4 +92,8 @@ class DtoMeta {
     }
     return property;
   }
+
+  Class<?> dtoType() {
+    return dtoType;
+  }
 }

src/main/java/io/ebeaninternal/server/expression/DefaultExpressionList.java

@@ -346,8 +346,9 @@ public class DefaultExpressionList<T> implements SpiExpressionList<T> {
   }
 
   @Override
-  public Query<T> orderBy(String orderBy) {
-    return query.order(orderBy);
+  public ExpressionList<T> orderBy(String orderBy) {
+    query.order(orderBy);
+    return this;
   }
 
   @Override

src/main/java/io/ebeaninternal/server/expression/FilterExpressionList.java

@@ -145,8 +145,9 @@ public class FilterExpressionList<T> extends DefaultExpressionList<T> {
   }
 
   @Override
-  public Query<T> orderBy(String orderBy) {
-    return rootQuery.orderBy(orderBy);
+  public ExpressionList<T> orderBy(String orderByClause) {
+    this.orderByClause = orderByClause;
+    return this;
   }
 
   @Override

src/main/java/io/ebeaninternal/server/expression/IdInExpression.java

@@ -104,16 +104,18 @@ public class IdInExpression extends NonPrepareExpression {
 
   @Override
   public void addSql(SpiExpressionRequest request) {
-
-    DefaultExpressionRequest r = (DefaultExpressionRequest) request;
-    BeanDescriptor<?> descriptor = r.getBeanDescriptor();
+    BeanDescriptor<?> descriptor = request.getBeanDescriptor();
     IdBinder idBinder = descriptor.getIdBinder();
     if (idCollection.isEmpty()) {
       request.append(SQL_FALSE); // append false for this stage
     } else {
-      request.append(descriptor.getIdBinderInLHSSql());
-      String inClause = idBinder.getIdInValueExpr(false, idCollection.size());
-      request.append(inClause);
+      if (idBinder.isComplexId()) {
+        request.append(descriptor.getIdBinderInLHSSql());
+        request.append(idBinder.getIdInValueExpr(false, idCollection.size()));
+      } else {
+        request.append(idBinder.getBeanProperty().getName());
+        request.appendInExpression(false, idCollection);
+      }
     }
   }
 

src/main/java/io/ebeaninternal/server/expression/JunctionExpression.java

@@ -809,7 +809,7 @@ class JunctionExpression<T> implements SpiJunction<T>, SpiExpression, Expression
   }
 
   @Override
-  public Query<T> orderBy(String orderBy) {
+  public ExpressionList<T> orderBy(String orderBy) {
     return exprList.orderBy(orderBy);
   }
 

src/main/java/io/ebeaninternal/server/expression/platform/DbExpressionHandlerFactory.java

@@ -18,6 +18,8 @@ public class DbExpressionHandlerFactory {
       case POSTGRES:
       case POSTGRES9:
         return new PostgresDbExpression();
+      case MARIADB:
+        return new MariaDbExpression();
       case MYSQL55:
       case MYSQL:
         return new MySqlDbExpression();

src/main/java/io/ebeaninternal/server/expression/platform/MariaDbExpression.java

@@ -0,0 +1,16 @@
+package io.ebeaninternal.server.expression.platform;
+
+import io.ebeaninternal.api.SpiExpressionRequest;
+import io.ebeaninternal.server.expression.Op;
+
+/**
+ * MariaDB specific handling of platform specific expressions.
+ */
+class MariaDbExpression extends BasicDbExpression {
+
+  @Override
+  public void json(SpiExpressionRequest request, String propName, String path, Op operator, Object value) {
+    request.append("(").append(propName).append(" ->> '$.").append(path).append("')");
+    request.append(operator.bind());
+  }
+}

src/main/java/io/ebeaninternal/server/loadcontext/DLoadBeanContext.java

@@ -175,7 +175,6 @@ class DLoadBeanContext extends DLoadBaseContext implements LoadBeanContext {
     @Override
     public void loadBean(EntityBeanIntercept ebi) {
       // A synchronized (this) is effectively held by EntityBeanIntercept.loadBean()
-
       if (context.desc.lazyLoadMany(ebi)) {
         // lazy load property was a Many
         return;
@@ -183,7 +182,6 @@ class DLoadBeanContext extends DLoadBaseContext implements LoadBeanContext {
 
       if (context.hitCache) {
         Set<EntityBeanIntercept> hits = context.desc.cacheBeanLoadAll(list, persistenceContext, ebi.getLazyLoadPropertyIndex(), ebi.getLazyLoadProperty());
-
         list.removeAll(hits);
         if (list.isEmpty() || hits.contains(ebi)) {
           // successfully hit the L2 cache so don't invoke DB lazy loading
@@ -193,6 +191,7 @@ class DLoadBeanContext extends DLoadBaseContext implements LoadBeanContext {
 
       LoadBeanRequest req = new LoadBeanRequest(this, ebi, context.hitCache);
       context.desc.getEbeanServer().loadBean(req);
+      list.clear();
     }
   }
 

src/main/java/io/ebeaninternal/server/loadcontext/DLoadContext.java

@@ -73,7 +73,6 @@ public class DLoadContext implements LoadContext {
    * Construct for use with JSON marshalling (doc store).
    */
   public DLoadContext(BeanDescriptor<?> rootDescriptor, PersistenceContext persistenceContext) {
-
     this.useDocStore = true;
     this.rootDescriptor = rootDescriptor;
     this.ebeanServer = rootDescriptor.getEbeanServer();
@@ -100,7 +99,6 @@ public class DLoadContext implements LoadContext {
   }
 
   public DLoadContext(OrmQueryRequest<?> request, SpiQuerySecondary secondaryQueries) {
-
     this.tenantId = request.getTenantId();
     this.persistenceContext = request.getPersistenceContext();
     this.ebeanServer = request.getServer();
@@ -131,7 +129,6 @@ public class DLoadContext implements LoadContext {
 
     // initialise rootBeanContext after origin and relativePath have been set
     this.rootBeanContext = new DLoadBeanContext(this, rootDescriptor, null, defaultBatchSize, null);
-
     registerSecondaryQueries(secondaryQueries);
   }
 
@@ -153,14 +150,12 @@ public class DLoadContext implements LoadContext {
    * Register the +query and +lazy secondary queries with their appropriate LoadBeanContext or LoadManyContext.
    */
   private void registerSecondaryQueries(SpiQuerySecondary secondaryQueries) {
-
     this.secQuery = secondaryQueries.getQueryJoins();
     if (secQuery != null) {
       for (OrmQueryProperties pathProperties : secQuery) {
         registerSecondaryQuery(pathProperties);
       }
     }
-
     List<OrmQueryProperties> lazyJoins = secondaryQueries.getLazyJoins();
     if (lazyJoins != null) {
       for (OrmQueryProperties lazyJoin : lazyJoins) {
@@ -174,9 +169,7 @@ public class DLoadContext implements LoadContext {
    * used to build the appropriate query for +query or +lazy loading.
    */
   private void registerSecondaryQuery(OrmQueryProperties props) {
-
     ElPropertyValue elGetValue = rootDescriptor.getElGetValue(props.getPath());
-
     boolean many = elGetValue.getBeanProperty().containsMany();
     registerSecondaryNode(many, props);
   }
@@ -190,11 +183,9 @@ public class DLoadContext implements LoadContext {
    */
   @Override
   public int getSecondaryQueriesMinBatchSize(int defaultQueryBatch) {
-
     if (secQuery == null) {
       return -1;
     }
-
     int maxBatch = 0;
     for (OrmQueryProperties aSecQuery : secQuery) {
       int batchSize = aSecQuery.getQueryFetchBatch();
@@ -211,7 +202,6 @@ public class DLoadContext implements LoadContext {
    */
   @Override
   public void executeSecondaryQueries(OrmQueryRequest<?> parentRequest, boolean forEach) {
-
     if (secQuery != null) {
       for (OrmQueryProperties aSecQuery : secQuery) {
         LoadSecondaryQuery load = getLoadSecondaryQuery(aSecQuery.getPath());
@@ -234,7 +224,6 @@ public class DLoadContext implements LoadContext {
   }
 
   private ObjectGraphNode createObjectGraphNode(String path) {
-
     if (relativePath != null) {
       if (path == null) {
         path = relativePath;
@@ -311,7 +300,6 @@ public class DLoadContext implements LoadContext {
   }
 
   private void registerSecondaryNode(boolean many, OrmQueryProperties props) {
-
     int batchSize;
     if (props.isQueryFetch()) {
       batchSize = 100;
@@ -319,7 +307,6 @@ public class DLoadContext implements LoadContext {
       int lazyJoinBatch = props.getLazyFetchBatch();
       batchSize = lazyJoinBatch > 0 ? lazyJoinBatch : defaultBatchSize;
     }
-
     String path = props.getPath();
     if (many) {
       manyMap.put(path, createManyContext(path, batchSize, props));
@@ -336,7 +323,6 @@ public class DLoadContext implements LoadContext {
   }
 
   private DLoadManyContext createManyContext(String path, int batchSize, OrmQueryProperties queryProps) {
-
     BeanPropertyAssocMany<?> p = (BeanPropertyAssocMany<?>) getBeanProperty(rootDescriptor, path);
     return new DLoadManyContext(this, p, path, batchSize, queryProps);
   }

src/main/java/io/ebeaninternal/server/persist/BatchedPstmt.java

@@ -53,8 +53,9 @@ public class BatchedPstmt implements SpiProfileTransactionEvent {
   /**
    * Create with a given statement.
    */
-  public BatchedPstmt(PreparedStatement pstmt, boolean isGenKeys, String sql, SpiTransaction transaction) {
+  public BatchedPstmt(PreparedStatement pstmt, boolean isGenKeys, String sql, SpiTransaction transaction) throws SQLException {
     this.pstmt = pstmt;
+    this.pstmt.clearBatch();
     this.isGenKeys = isGenKeys;
     this.sql = sql;
     this.transaction = transaction;
@@ -92,7 +93,7 @@ public class BatchedPstmt implements SpiProfileTransactionEvent {
   private void flushStatementBatch() throws SQLException {
     final int[] rows = pstmt.executeBatch();
     if (rows.length != list.size()) {
-      throw new IllegalStateException("Invalid state? rows:" + rows.length + " != " + list.size());
+      throw new IllegalStateException("Invalid state on executeBatch, rows:" + rows.length + " != " + list.size());
     }
     for (BatchPostExecute item : list) {
       item.postExecute();
@@ -156,8 +157,7 @@ public class BatchedPstmt implements SpiProfileTransactionEvent {
     try {
       results = pstmt.executeBatch();
       if (results.length != list.size()) {
-        String s = "results array error " + results.length + " " + list.size();
-        throw new SQLException(s);
+        throw new SQLException("Invalid state on executeBatch, rows:" + results.length + " != " + list.size());
       }
       // check for concurrency exceptions...
       for (int i = 0; i < results.length; i++) {

src/main/java/io/ebeaninternal/server/persist/SaveManyBeans.java

@@ -18,6 +18,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 import static io.ebeaninternal.server.persist.DmlUtil.isNullOrZero;
@@ -68,10 +69,9 @@ public class SaveManyBeans extends SaveManyBase {
         resetModifyState();
       }
     } else {
-      if (isModifyListenMode()) {
-        // delete any removed beans via private owned. Needs to occur before
-        // a 'deleteMissingChildren' statement occurs
-        removeAssocManyPrivateOwned();
+      if (isModifyListenMode() || many.hasOrderColumn()) {
+        // delete any removed beans / orphans
+        removeAssocManyOrphans();
       }
       if (cascade) {
         // potentially deletes 'missing children' for 'stateless update'
@@ -108,7 +108,7 @@ public class SaveManyBeans extends SaveManyBase {
     BeanProperty orderColumn = null;
     boolean hasOrderColumn = many.hasOrderColumn();
     if (hasOrderColumn) {
-      if (!insertedParent && canSkipForOrderColumn()) {
+      if (!insertedParent && canSkipForOrderColumn() && saveRecurseSkippable) {
         return;
       }
       orderColumn = targetDescriptor.getOrderColumn();
@@ -157,7 +157,7 @@ public class SaveManyBeans extends SaveManyBase {
         if (many.hasJoinTable()) {
           skipSavingThisBean = targetDescriptor.isReference(ebi);
         } else {
-          if (orderColumn != null) {
+          if (orderColumn != null && !Objects.equals(sortOrder, orderColumn.getValue(detail))) {
             orderColumn.setValue(detail, sortOrder);
             ebi.setDirty(true);
           }
@@ -178,6 +178,11 @@ public class SaveManyBeans extends SaveManyBase {
 
         if (!skipSavingThisBean) {
           persister.saveRecurse(detail, transaction, parentBean, request.getFlags());
+          if (many.hasOrderColumn()) {
+            // Clear the bean from the PersistenceContext (L1 cache), because the order of referenced beans might have changed
+            final BeanDescriptor<?> beanDescriptor = many.getBeanDescriptor();
+            beanDescriptor.contextClear(transaction.getPersistenceContext(), beanDescriptor.getId(parentBean));
+          }
         }
       }
     }
@@ -334,20 +339,25 @@ public class SaveManyBeans extends SaveManyBase {
     transaction.depth(-1);
   }
 
-  private void removeAssocManyPrivateOwned() {
-
+  private void removeAssocManyOrphans() {
     // check that the list is not null and if it is a BeanCollection
     // check that is has been populated (don't trigger lazy loading)
     if (value instanceof BeanCollection<?>) {
-
       BeanCollection<?> c = (BeanCollection<?>) value;
       Set<?> modifyRemovals = c.getModifyRemovals();
-      modifyListenReset(c);
+      if (insertedParent) {
+        // after insert set the modify listening mode for private owned etc
+        c.setModifyListening(many.getModifyListenMode());
+      }
+      // We must not reset when we still have to update other entities in the collection and set their new orderColumn value
+      if (!many.hasOrderColumn()) {
+        c.modifyReset();
+      }
       if (modifyRemovals != null && !modifyRemovals.isEmpty()) {
         for (Object removedBean : modifyRemovals) {
           if (removedBean instanceof EntityBean) {
             EntityBean eb = (EntityBean) removedBean;
-            if (!eb._ebean_getIntercept().isNew()) {
+            if (eb._ebean_intercept().isOrphanDelete()) {
               // only delete if the bean was loaded meaning that it is known to exist in the DB
               persister.deleteRequest(persister.createDeleteRemoved(removedBean, transaction, request.getFlags()));
             }

src/main/java/io/ebeaninternal/server/persist/dml/InsertMeta.java

@@ -13,6 +13,9 @@ import io.ebeaninternal.server.persist.dmlbind.BindableList;
 
 import java.sql.SQLException;
 
+import static io.ebean.annotation.Platform.MARIADB;
+import static io.ebean.annotation.Platform.MYSQL;
+
 /**
  * Meta data for insert handler. The meta data is for a particular bean type. It
  * is considered immutable and is thread safe.
@@ -166,12 +169,7 @@ final class InsertMeta {
 
     request.append("insert into ").append(table);
     if (nullId && noColumnsForInsert(draftTable)) {
-      if (this.platform.base() == Platform.MYSQL) {
-        request.append(" values (default)");
-      } else {
-        request.append(" default values");
-      }
-      return request.toString();
+      return request.append(defaultValues()).toString();
     }
 
     request.append(" (");
@@ -199,6 +197,10 @@ final class InsertMeta {
     return request.toString();
   }
 
+  private String defaultValues() {
+    return platform.base() == MYSQL || platform.base() == MARIADB ? " values (default)" : " default values";
+  }
+
   /**
    * Return true if the insert actually contains no columns.
    */

src/main/java/io/ebeaninternal/server/query/CQuery.java

@@ -608,12 +608,10 @@ public class CQuery<T> implements DbReadContext, CancelableQuery, SpiProfileTran
   }
 
   QueryIterator<T> readIterate(int bufferSize, OrmQueryRequest<T> request) {
-
-    if (bufferSize > 0) {
-      return new CQueryIteratorWithBuffer<>(this, request, bufferSize);
-
-    } else {
+    if (bufferSize == 1) {
       return new CQueryIteratorSimple<>(this, request);
+    } else {
+      return new CQueryIteratorWithBuffer<>(this, request, bufferSize);
     }
   }
 

src/main/java/io/ebeaninternal/server/query/CQueryBuilder.java

@@ -95,7 +95,7 @@ class CQueryBuilder {
 
     SpiQuery<T> query = request.getQuery();
     String rootTableAlias = query.getAlias();
-    query.setupForDeleteOrUpdate(deleteRequest);
+    query.setupForDeleteOrUpdate();
 
     CQueryPredicates predicates = new CQueryPredicates(binder, request);
     CQueryPlan queryPlan = request.getQueryPlan();
@@ -125,7 +125,7 @@ class CQueryBuilder {
   private <T> String buildDeleteSql(OrmQueryRequest<T> request, String rootTableAlias, CQueryPredicates predicates, SqlTree sqlTree) {
 
     String alias = alias(rootTableAlias);
-    if (sqlTree.noJoins()) {
+    if (sqlTree.noJoins() && !request.getQuery().hasMaxRowsOrFirstRow()) {
       if (dbPlatform.isSupportsDeleteTableAlias()) {
         // delete from table <alias> ...
         return aliasReplace(buildSqlDelete("delete", request, predicates, sqlTree).getSql(), alias);

src/main/java/io/ebeaninternal/server/query/CQueryEngine.java

@@ -201,26 +201,20 @@ public class CQueryEngine {
    * when you have finished).
    */
   public <T> QueryIterator<T> findIterate(OrmQueryRequest<T> request) {
-
     CQuery<T> cquery = queryBuilder.buildQuery(request);
     request.setCancelableQuery(cquery);
     try {
       if (defaultFetchSizeFindEach > 0) {
         request.setDefaultFetchBuffer(defaultFetchSizeFindEach);
       }
-      if (request.isIterateSingleContext()) {
-        // expected relatively small number of results, single persistence context
-        cquery.prepareBindExecuteQuery();
-      } else if (!cquery.prepareBindExecuteQueryForwardOnly(forwardOnlyHintOnFindIterate)) {
+      if (!cquery.prepareBindExecuteQueryForwardOnly(forwardOnlyHintOnFindIterate)) {
         // query has been cancelled already
         logger.trace("Future fetch already cancelled");
         return null;
       }
-
       if (request.isLogSql()) {
         logSql(cquery);
       }
-
       // first check batch sizes set on query joins
       int iterateBufferSize = request.getSecondaryQueriesMinBatchSize(defaultSecondaryQueryBatchSize);
       if (iterateBufferSize < 1) {
@@ -228,20 +222,19 @@ public class CQueryEngine {
         int queryBatch = request.getQuery().getLazyLoadBatchSize();
         if (queryBatch > 0) {
           iterateBufferSize = queryBatch;
+        } else {
+          iterateBufferSize = 100;
         }
       }
 
       QueryIterator<T> readIterate = cquery.readIterate(iterateBufferSize, request);
-
       if (request.isLogSummary()) {
         logFindManySummary(cquery);
       }
-
       if (request.isAuditReads()) {
         // indicates we need to audit as the iterator progresses
         cquery.auditFindIterate();
       }
-
       return readIterate;
 
     } catch (SQLException e) {

src/main/java/io/ebeaninternal/server/query/CQueryIteratorWithBuffer.java

@@ -6,6 +6,7 @@ import io.ebeaninternal.server.core.OrmQueryRequest;
 import javax.persistence.PersistenceException;
 import java.sql.SQLException;
 import java.util.ArrayList;
+import java.util.NoSuchElementException;
 
 /**
  * A QueryIterator that uses a buffer to execute secondary queries periodically.
@@ -17,6 +18,7 @@ class CQueryIteratorWithBuffer<T> implements QueryIterator<T> {
   private final OrmQueryRequest<T> request;
   private final ArrayList<T> buffer;
 
+  private boolean closed;
   private boolean moreToLoad = true;
 
   CQueryIteratorWithBuffer(CQuery<T> cquery, OrmQueryRequest<T> request, int bufferSize) {
@@ -29,6 +31,7 @@ class CQueryIteratorWithBuffer<T> implements QueryIterator<T> {
   @Override
   @SuppressWarnings("unchecked")
   public boolean hasNext() {
+    boolean ret = false;
     try {
       if (buffer.isEmpty() && moreToLoad) {
         // load buffer
@@ -44,23 +47,33 @@ class CQueryIteratorWithBuffer<T> implements QueryIterator<T> {
         }
         request.executeSecondaryQueries(true);
       }
-      return !buffer.isEmpty();
-
+      ret = !buffer.isEmpty();
+      return ret;
     } catch (SQLException e) {
       throw cquery.createPersistenceException(e);
+    } finally {
+      if (!ret) {
+        close();
+      }
     }
   }
 
   @Override
   public T next() {
+    if (buffer.isEmpty()) {
+      throw new NoSuchElementException();
+    }
     return buffer.remove(0);
   }
 
   @Override
   public void close() {
-    cquery.updateExecutionStatisticsIterator();
-    cquery.close();
-    request.endTransIfRequired();
+    if (!closed) {
+      closed = true;
+      cquery.updateExecutionStatisticsIterator();
+      cquery.close();
+      request.endTransIfRequired();
+    }
   }
 
   @Override

src/main/java/io/ebeaninternal/server/query/DefaultDbSqlContext.java

@@ -328,11 +328,9 @@ class DefaultDbSqlContext implements DbSqlContext {
   }
 
   @Override
-  public void appendRawColumn(String rawcolumnWithTableAlias) {
+  public void appendRawColumn(String rawColumnWithAlias) {
     sb.append(COMMA);
-    sb.append(rawcolumnWithTableAlias);
-
-    appendColumnAlias();
+    sb.append(rawColumnWithAlias);
   }
 
   @Override

src/main/java/io/ebeaninternal/server/query/DefaultOrmQueryEngine.java

@@ -133,7 +133,7 @@ public class DefaultOrmQueryEngine implements OrmQueryEngine {
 
     SpiQuery<T> query = request.getQuery();
 
-    if (request.isBeanCachePut()) {
+    if (request.isBeanCachePutMany()) {
       // load the individual beans into the bean cache
       BeanDescriptor<T> descriptor = request.getBeanDescriptor();
       Collection<T> c = result.getActualDetails();

src/main/java/io/ebeaninternal/server/querydefn/DefaultOrmQuery.java

@@ -684,13 +684,7 @@ public class DefaultOrmQuery<T> implements SpiQuery<T> {
    * Setup to be a delete or update query.
    */
   @Override
-  public void setupForDeleteOrUpdate(boolean deleteRequest) {
-    // unset any paging and select on the id in the case where the query
-    // includes joins and we use - delete ... where id in (...)
-    if (deleteRequest) {
-      maxRows = 0;
-    }
-    firstRow = 0;
+  public void setupForDeleteOrUpdate() {
     forUpdate = null;
     rootTableAlias = "${RTA}"; // alias we remove later
     setSelectId();
@@ -1721,8 +1715,10 @@ public class DefaultOrmQuery<T> implements SpiQuery<T> {
   }
 
   @Override
-  public void setManualId(boolean manualId) {
-    this.manualId = manualId;
+  public void setManualId() {
+    if (detail != null && detail.hasSelectClause()) {
+      this.manualId = true;
+    }
   }
 
   /**

src/main/java/io/ebeaninternal/server/transaction/AutoCommitJdbcTransaction.java

@@ -1,31 +0,0 @@
-package io.ebeaninternal.server.transaction;
-
-import java.sql.Connection;
-
-/**
- * AutoCommit friendly Transaction.
- * <p>
- * Skips actual commit and rollback as these are performed automatically.
- */
-public class AutoCommitJdbcTransaction extends JdbcTransaction {
-
-  public AutoCommitJdbcTransaction(String id, boolean explicit, Connection connection, TransactionManager manager) {
-    super(id, explicit, connection, manager);
-  }
-
-  @Override
-  protected void checkAutoCommit(Connection connection) {
-    // do nothing as autoCommit
-  }
-
-  @Override
-  protected void performRollback() {
-    // do nothing as autoCommit
-  }
-
-  @Override
-  protected void performCommit() {
-    // do nothing as autoCommit
-  }
-
-}

src/main/java/io/ebeaninternal/server/transaction/AutoCommitTransactionManager.java

@@ -1,26 +0,0 @@
-package io.ebeaninternal.server.transaction;
-
-import io.ebeaninternal.api.SpiTransaction;
-
-import java.sql.Connection;
-
-/**
- * AutoCommit based TransactionManager.
- * <p>
- * Intended to be used if when autoCommit mode is desired.
- */
-public class AutoCommitTransactionManager extends TransactionManager {
-
-  public AutoCommitTransactionManager(TransactionManagerOptions options) {
-    super(options);
-  }
-
-  /**
-   * Create an autoCommit based Transaction.
-   */
-  @Override
-  protected SpiTransaction createTransaction(boolean explicit, Connection c) {
-    return new AutoCommitJdbcTransaction(nextTxnId(), explicit, c, this);
-  }
-
-}

src/main/java/io/ebeaninternal/server/transaction/DefaultPersistenceContext.java

@@ -34,18 +34,62 @@ public final class DefaultPersistenceContext implements PersistenceContext {
 
   private final Monitor monitor = new Monitor();
 
+  private int putCount;
+
   /**
    * Create a new PersistenceContext.
    */
   public DefaultPersistenceContext() {
   }
 
+  /**
+   * Create as a shallow copy with initial or types that have not been added to.
+   */
+  private DefaultPersistenceContext(DefaultPersistenceContext parent, boolean initial) {
+    for (Map.Entry<Class<?>, ClassContext> entry : parent.typeCache.entrySet()) {
+      typeCache.put(entry.getKey(), entry.getValue().copy(initial));
+    }
+  }
+
+  /**
+   * Return the initial shallow copy with each ClassContext noting it's initialSize (to detect additions).
+   */
+  @Override
+  public PersistenceContext forIterate() {
+    return new DefaultPersistenceContext(this, true);
+  }
+
+  /**
+   * Return a shallow copy including each ClassContext that has had no additions (still at initialSize).
+   */
+  @Override
+  public PersistenceContext forIterateReset() {
+    return new DefaultPersistenceContext(this, false);
+  }
+
+  public boolean resetLimit() {
+    synchronized (monitor) {
+      if (putCount < 100) {
+        return false;
+      }
+      putCount = 0;
+      for (ClassContext value : typeCache.values()) {
+        if (value.resetLimit()) {
+          return true;
+        }
+      }
+      // checking after another 100 puts
+      return false;
+    }
+  }
+
   /**
    * Set an object into the PersistenceContext.
    */
   @Override
   public void put(Class<?> rootType, Object id, Object bean) {
     synchronized (monitor) {
+      putCount++;
       getClassContext(rootType).put(id, bean);
     }
   }
@@ -53,6 +97,7 @@ public final class DefaultPersistenceContext implements PersistenceContext {
   @Override
   public Object putIfAbsent(Class<?> rootType, Object id, Object bean) {
     synchronized (monitor) {
+      putCount++;
       return getClassContext(rootType).putIfAbsent(id, bean);
     }
   }
@@ -133,7 +178,6 @@ public final class DefaultPersistenceContext implements PersistenceContext {
   }
 
   private ClassContext getClassContext(Class<?> rootType) {
-
     return typeCache.computeIfAbsent(rootType, k -> new ClassContext());
   }
 
@@ -143,29 +187,72 @@ public final class DefaultPersistenceContext implements PersistenceContext {
 
     private Set<Object> deleteSet;
 
+    private int initialSize;
+
+    private ClassContext parent;
+
     private ClassContext() {
     }
 
+    /**
+     * Create as a shallow copy.
+     */
+    private ClassContext(ClassContext source, boolean initial) {
+      if (initial || source.isTransfer()) {
+        parent = source.transferParent();
+        initialSize = parent.size();
+        if (source.deleteSet != null) {
+          deleteSet = new HashSet<>(source.deleteSet);
+        }
+      }
+    }
+
+    /**
+     * True if this should be transferred to a new iterator persistence context.
+     */
+    private boolean isTransfer() {
+      // map not added to and has some original/parent beans
+      return map.isEmpty() && initialSize > 0;
+    }
+
+    private ClassContext transferParent() {
+      return (parent != null) ? parent : this;
+    }
+
+    /**
+     * Return a shallow copy if initial copy or it has not grown (still at initialSize).
+     */
+    private ClassContext copy(boolean initial) {
+      return new ClassContext(this, initial);
+    }
+
+    /**
+     * Return true if grown above the reset limit size of 1000.
+     */
+    private boolean resetLimit() {
+      return map.size() > 1000;
+    }
+
     @Override
     public String toString() {
       return "size:" + map.size();
     }
 
+    private Object get(Object id) {
+      Object bean = (parent == null) ? null : parent.get(id);
+      return bean != null ? bean : map.get(id);
+    }
+
     private WithOption getWithOption(Object id) {
       if (deleteSet != null && deleteSet.contains(id)) {
         return WithOption.DELETED;
       }
-      Object bean = map.get(id);
+      Object bean = get(id);
       return (bean == null) ? null : new WithOption(bean);
     }
 
-    private Object get(Object id) {
-      return map.get(id);
-    }
-
     private Object putIfAbsent(Object id, Object bean) {
-
-      Object existingValue = map.get(id);
+      Object existingValue = get(id);
       if (existingValue != null) {
         // it is not absent
         return existingValue;
@@ -180,7 +267,7 @@ public final class DefaultPersistenceContext implements PersistenceContext {
     }
 
     private int size() {
-      return map.size();
+      return map.size() + initialSize;
     }
 
     private void clear() {

src/main/java/io/ebeaninternal/server/transaction/DocStoreTransactionManager.java

@@ -24,7 +24,7 @@ public class DocStoreTransactionManager extends TransactionManager {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
     return new DocStoreOnlyTransaction("", false, this);
   }
 

src/main/java/io/ebeaninternal/server/transaction/ExplicitJdbcTransaction.java

@@ -1,42 +0,0 @@
-package io.ebeaninternal.server.transaction;
-
-import java.sql.Connection;
-import java.sql.PreparedStatement;
-import java.sql.SQLException;
-
-/**
- * This only works for Postgres and H2 (and doesn't work for Oracle).
- * <p>
- * Uses explicit begin statement to start the transactions.
- */
-public class ExplicitJdbcTransaction extends JdbcTransaction {
-
-  public ExplicitJdbcTransaction(String id, boolean explicit, Connection connection, TransactionManager manager) {
-    super(id, explicit, connection, manager);
-  }
-
-  @Override
-  protected void checkAutoCommit(Connection connection) throws SQLException {
-    // begin the transaction explicitly
-    executeStatement("begin");
-  }
-
-  @Override
-  protected void performRollback() throws SQLException {
-    // Postgres needs this explicit rollback statement when used with AutoCommit=true
-    executeStatement("rollback");
-  }
-
-  @Override
-  protected void performCommit() throws SQLException {
-    // Postgres needs this explicit commit statement when used with AutoCommit=true
-    executeStatement("commit");
-  }
-
-  private void executeStatement(String statement) throws SQLException {
-    try (PreparedStatement stmt = connection.prepareStatement(statement)) {
-      stmt.execute();
-    }
-  }
-
-}

src/main/java/io/ebeaninternal/server/transaction/ExplicitTransactionManager.java

@@ -1,40 +0,0 @@
-package io.ebeaninternal.server.transaction;
-
-import io.ebean.config.dbplatform.DatabasePlatform;
-import io.ebeaninternal.api.SpiTransaction;
-
-import java.sql.Connection;
-
-/**
- * TransactionManager where the transactions start with explicit "begin" statement.
- */
-public class ExplicitTransactionManager extends TransactionManager {
-
-  public ExplicitTransactionManager(TransactionManagerOptions options) {
-    super(options);
-  }
-
-  /**
-   * Create a ExplicitJdbcTransaction.
-   */
-  @Override
-  protected SpiTransaction createTransaction(boolean explicit, Connection c) {
-    return new ExplicitJdbcTransaction(nextTxnId(), explicit, c, this);
-  }
-
-  /**
-   * Override the initialise of OnQueryOnly with the intention not to use CLOSE with ExplicitJdbcTransaction.
-   */
-  @Override
-  protected DatabasePlatform.OnQueryOnly initOnQueryOnly(DatabasePlatform.OnQueryOnly dbPlatformOnQueryOnly) {
-
-    // first check for a system property 'override'
-    String systemPropertyValue = System.getProperty("ebean.transaction.onqueryonly");
-    if (systemPropertyValue != null) {
-      return DatabasePlatform.OnQueryOnly.valueOf(systemPropertyValue.trim().toUpperCase());
-    }
-
-    // default to rollback if not defined on the platform
-    return dbPlatformOnQueryOnly == null ? DatabasePlatform.OnQueryOnly.ROLLBACK : dbPlatformOnQueryOnly;
-  }
-}

src/main/java/io/ebeaninternal/server/transaction/ImplicitReadOnlyTransaction.java

@@ -66,6 +66,8 @@ class ImplicitReadOnlyTransaction implements SpiTransaction, TxnProfileEventCode
 
   private final long startNanos;
 
+  private ProfileLocation profileLocation;
+
   /**
    * Create without a tenantId.
    */
@@ -125,12 +127,12 @@ class ImplicitReadOnlyTransaction implements SpiTransaction, TxnProfileEventCode
 
   @Override
   public void setProfileLocation(ProfileLocation profileLocation) {
-    throw new IllegalStateException(notExpectedMessage);
+    this.profileLocation = profileLocation;
   }
 
   @Override
   public ProfileLocation getProfileLocation() {
-    return null;
+    return profileLocation;
   }
 
   @Override
@@ -138,6 +140,11 @@ class ImplicitReadOnlyTransaction implements SpiTransaction, TxnProfileEventCode
     return false;
   }
 
+  @Override
+  public boolean isSkipCacheExplicit() {
+    return false;
+  }
+
   @Override
   public void setSkipCache(boolean skipCache) {
   }

src/main/java/io/ebeaninternal/server/transaction/JdbcTransaction.java

@@ -293,6 +293,11 @@ class JdbcTransaction implements SpiTransaction, TxnProfileEventCodes {
     return sb.toString();
   }
 
+  @Override
+  public boolean isSkipCacheExplicit() {
+    return (skipCache != null && !skipCache);
+  }
+
   @Override
   public boolean isSkipCache() {
     if (skipCache != null) return skipCache;

src/main/java/io/ebeaninternal/server/transaction/NoTransaction.java

@@ -200,6 +200,11 @@ class NoTransaction implements SpiTransaction {
   public void setSkipCache(boolean skipCache) {
   }
 
+  @Override
+  public boolean isSkipCacheExplicit() {
+    return false;
+  }
+
   @Override
   public boolean isSkipCache() {
     return false;

src/main/java/io/ebeaninternal/server/transaction/TransactionFactory.java

@@ -23,7 +23,7 @@ abstract class TransactionFactory {
    *
    * @param tenantId The tenantId for lazy loading queries.
    */
-  abstract SpiTransaction createQueryTransaction(Object tenantId);
+  abstract SpiTransaction createReadOnlyTransaction(Object tenantId);
 
   /**
    * Return a new transaction.

src/main/java/io/ebeaninternal/server/transaction/TransactionFactoryBasic.java

@@ -21,7 +21,7 @@ class TransactionFactoryBasic extends TransactionFactory {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
 
     Connection connection = null;
     try {

src/main/java/io/ebeaninternal/server/transaction/TransactionFactoryBasicWithRead.java

@@ -26,7 +26,7 @@ class TransactionFactoryBasicWithRead extends TransactionFactoryBasic {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
 
     Connection connection = null;
     try {

src/main/java/io/ebeaninternal/server/transaction/TransactionFactoryTenant.java

@@ -24,7 +24,7 @@ class TransactionFactoryTenant extends TransactionFactory {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
     return create(false, tenantId);
   }
 

src/main/java/io/ebeaninternal/server/transaction/TransactionFactoryTenantWithRead.java

@@ -23,7 +23,7 @@ class TransactionFactoryTenantWithRead extends TransactionFactoryTenant {
   }
 
   @Override
-  public SpiTransaction createQueryTransaction(Object tenantId) {
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
 
     Connection connection = null;
     try {

src/main/java/io/ebeaninternal/server/transaction/TransactionManager.java

@@ -191,6 +191,7 @@ public class TransactionManager implements SpiTransactionManager {
     this.txnMain = metricFactory.createTimedMetric("txn.main");
     this.txnReadOnly = metricFactory.createTimedMetric("txn.readonly");
     this.txnNamed = metricFactory.createTimedMetricMap("txn.named.");
+    // Add gauges for db pool size
 
     scopeManager.register(this);
   }
@@ -356,6 +357,14 @@ public class TransactionManager implements SpiTransactionManager {
     return t;
   }
 
+  private SpiTransaction createTransaction(TxScope txScope) {
+    if (txScope.isReadonly()) {
+      return createReadOnlyTransaction(null);
+    } else {
+      return createTransaction(true, txScope.getIsolationLevel());
+    }
+  }
+
   /**
    * Create a new Transaction.
    */
@@ -366,8 +375,8 @@ public class TransactionManager implements SpiTransactionManager {
   /**
    * Create a new Transaction for query only purposes (can use read only datasource).
    */
-  public SpiTransaction createQueryTransaction(Object tenantId) {
-    return transactionFactory.createQueryTransaction(tenantId);
+  public SpiTransaction createReadOnlyTransaction(Object tenantId) {
+    return transactionFactory.createReadOnlyTransaction(tenantId);
   }
 
   /**
@@ -669,7 +678,7 @@ public class TransactionManager implements SpiTransactionManager {
             transaction = NoTransaction.INSTANCE;
             break;
           default:
-            transaction = createTransaction(true, txScope.getIsolationLevel());
+            transaction = createTransaction(txScope);
             initNewTransaction(transaction, txScope);
         }
       }

src/main/java/io/ebeanservice/docstore/none/NoneDocStore.java

@@ -19,7 +19,7 @@ import java.util.function.Predicate;
 public class NoneDocStore implements DocumentStore {
 
   public static IllegalStateException implementationNotInClassPath() {
-    throw new IllegalStateException("DocStore implementation not included in the classPath. You need to add the maven dependency for avaje-ebeanorm-elastic");
+    throw new IllegalStateException("DocStore implementation not included in the classPath. You need to add the maven dependency for io.ebean:ebean-elastic");
   }
 
   @Override