#1333 - ENH: Support "dynamic formula" with findSingleAttributeList() ... e.g. .select("concat(lastName,', ',firstName)")

Support cast of formula like ... select("max(updtime)::Instant")

src/test/java/io/ebeaninternal/server/deploy/FormulaPropertyPathTest.java

@@ -31,12 +31,50 @@ public class FormulaPropertyPathTest extends BaseTestCase {
     assertFormula("concat(name,'-end')", "concat", "name,'-end'");
   }
 
-  private void assertFormula(String input, String aggType, String baseProperty) {
+  @Test
+  public void castFormula() {
+
+    assertFormula("concat(name,'-end')::String", "concat", "name,'-end'", "String", null);
+  }
+
+  @Test
+  public void cast_javaInstant() {
+
+    assertFormula("max(updtime)::Instant", "max", "updtime", "Instant", null);
+  }
+
+  @Test
+  public void alias() {
+    assertFormula("concat(name,'-end') name", "concat", "name,'-end'", null, "name");
+    assertFormula("concat(name,'-end') as name", "concat", "name,'-end'", null, "name");
+  }
+
+  @Test
+  public void castAndAlias() {
+    assertFormula("concat(name,'-end')::String name", "concat", "name,'-end'", "String", "name");
+    assertFormula("concat(name,'-end')::String as name", "concat", "name,'-end'", "String", "name");
+  }
+
+  private void assertFormula(String input, String funcName, String expression) {
+    assertFormula(input, funcName, expression, null, null);
+  }
+
+  private void assertFormula(String input, String funcName, String expression, String cast, String alias) {
 
     FormulaPropertyPath propertyPath = new FormulaPropertyPath(customerDesc, input);
 
-    assertThat(propertyPath.basePropertyName()).isEqualTo(baseProperty);
-    assertThat(propertyPath.aggType()).isEqualTo(aggType);
+    assertThat(propertyPath.internalExpression()).isEqualTo(expression);
+    assertThat(propertyPath.outerFunction()).isEqualTo(funcName);
+    if (cast != null) {
+      assertThat(propertyPath.cast()).isEqualTo(cast);
+    } else {
+      assertThat(propertyPath.cast()).isNull();
+    }
+    if (alias != null) {
+      assertThat(propertyPath.alias()).isEqualTo(alias);
+    } else {
+      assertThat(propertyPath.alias()).isNull();
+    }
 
     SqlTreeProperty treeProperty = propertyPath.build();
 

src/test/java/org/tests/query/aggregation/TestAggregationCount.java

@@ -15,6 +15,7 @@ import org.tests.model.tevent.TEventMany;
 import org.tests.model.tevent.TEventOne;
 
 import java.sql.Timestamp;
+import java.time.Instant;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -423,4 +424,24 @@ public class TestAggregationCount extends BaseTestCase {
     assertThat(sql.get(0)).contains("select concat(t0.updtime,', ',t0.first_name) from contact t0");
   }
 
+  @Test
+  public void explicitCast() {
+
+    ResetBasicData.reset();
+
+    LoggedSqlCollector.start();
+
+    Instant instant =
+
+      Ebean.find(Contact.class)
+        .select("max(updtime)::Instant")
+        .where().isNull("phone")
+        .findSingleAttribute();
+
+    assertThat(instant).isNotNull();
+
+    List<String> sql = LoggedSqlCollector.stop();
+    assertThat(sql.get(0)).contains("select max(t0.updtime) from contact t0 where t0.phone is null");
+  }
+
 }