diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/MariaDBDialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/MariaDBDialect.java
index 52d4d9942c..81f256f41b 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/MariaDBDialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/MariaDBDialect.java
@@ -6,6 +6,7 @@
  */
 package org.hibernate.dialect;
 
+import java.sql.DatabaseMetaData;
 import java.sql.SQLException;
 import java.sql.Types;
 
@@ -161,7 +162,6 @@ public class MariaDBDialect extends MySQLDialect {
 		return false;
 	}
 
-
 	@Override
 	public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)
 			throws SQLException {
diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java
index adff3353c8..c874f79d72 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java
@@ -30,6 +30,9 @@ import org.hibernate.dialect.pagination.OffsetFetchLimitHandler;
 import org.hibernate.dialect.sequence.PostgreSQLSequenceSupport;
 import org.hibernate.dialect.sequence.SequenceSupport;
 import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
+import org.hibernate.engine.jdbc.env.spi.IdentifierCaseStrategy;
+import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
+import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.exception.LockAcquisitionException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
@@ -518,6 +521,18 @@ public class PostgreSQLDialect extends Dialect {
 		return String.valueOf( bool );
 	}
 
+	@Override
+	public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)
+			throws SQLException {
+
+		if ( dbMetaData == null ) {
+			builder.setUnquotedCaseStrategy( IdentifierCaseStrategy.LOWER );
+			builder.setQuotedCaseStrategy( IdentifierCaseStrategy.MIXED );
+		}
+
+		return super.buildIdentifierHelper( builder, dbMetaData );
+	}
+
 	@Override
 	public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
 			EntityMappingType rootEntityDescriptor,