Reverse the supportsAutoGeneratedKeys flag in PostgresDialect (#1133)

Author: nakamura-to

doma-core/src/main/java/org/seasar/doma/jdbc/dialect/PostgresDialect.java

@@ -222,6 +222,11 @@ public boolean supportsResultSetReturningAsOutParameter() {
     return true;
   }
 
+  @Override
+  public boolean supportsAutoGeneratedKeys() {
+    return true;
+  }
+
   @Override
   public JdbcType<ResultSet> getResultSetType() {
     return RESULT_SET;

doma-core/src/test/java/org/seasar/doma/jdbc/id/BuiltinIdentityIdGeneratorTest.java

@@ -17,7 +17,13 @@ public class BuiltinIdentityIdGeneratorTest {
   @Test
   public void test_identitySelectSql() {
     MockConfig config = new MockConfig();
-    config.setDialect(new PostgresDialect());
+    config.setDialect(
+        new PostgresDialect() {
+          @Override
+          public boolean supportsAutoGeneratedKeys() {
+            return false;
+          }
+        });
     MockResultSet resultSet = config.dataSource.connection.preparedStatement.resultSet;
     resultSet.rows.add(new RowData(11L));