#579 - Postgres History DDL - Revert of #544 such that Postgres @History DB trigger uses current_timestamp (transaction start time)

src/main/java/com/avaje/ebean/config/dbplatform/OraclePlatform.java

@@ -16,8 +16,6 @@ public class OraclePlatform extends DatabasePlatform {
     this.name = "oracle";
     this.maxTableNameLength = 30;
     this.maxConstraintNameLength = 30;
-    // OnQueryOnly.CLOSE as a performance optimisation on Oracle
-    this.onQueryOnly = OnQueryOnly.CLOSE;
     this.dbEncrypt = new OracleDbEncrypt();
     this.sqlLimiter = new RownumSqlLimiter();
     this.platformDdl = new Oracle10Ddl(this.dbTypeMap, this.dbIdentity);

src/main/java/com/avaje/ebean/config/dbplatform/PostgresPlatform.java

@@ -19,9 +19,6 @@ public class PostgresPlatform extends DatabasePlatform {
   public PostgresPlatform() {
     super();
     this.name = "postgres";
-
-    // OnQueryOnly.CLOSE as a performance optimisation on Postgres
-    this.onQueryOnly = OnQueryOnly.CLOSE;
     this.likeClause = "like ? escape''";
     this.selectCountWithAlias = true;
     this.blobDbType = Types.LONGVARBINARY;

src/main/java/com/avaje/ebean/dbmigration/ddlgeneration/platform/PostgresHistoryDdl.java

@@ -14,7 +14,7 @@ public class PostgresHistoryDdl extends DbTriggerBasedHistoryDdl {
 
 
   public PostgresHistoryDdl() {
-    this.currentTimestamp = "statement_timestamp()";
+    this.currentTimestamp = "current_timestamp";
   }
 
   /**