Sauli Anto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNjI4N2JjZTY5... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16119?atlOrigin=eyJpIjoiNjI4N2... ) HHH-16119 ( https://hibernate.atlassian.net/browse/HHH-16119?atlOrigin=eyJpIjoiNjI4N2... ) Named native queries do not work with jakarta.persistence.Tuple result class ( https://hibernate.atlassian.net/browse/HHH-16119?atlOrigin=eyJpIjoiNjI4N2... ) Change By: Sauli Anto ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Named native queries do not work with {{jakarta.persistence.Tuple}}  return class. E.g. calling {{entityManager.createNamedQuery("Demo.findAllCustom", Tuple.class);}} in the test case, it causes following NullPointerException: {noformat}Cannot invoke "String.toLowerCase()" because "aliases[i]" is null java.lang.NullPointerException: Cannot invoke "String.toLowerCase()" because "aliases[i]" is null at org.hibernate.jpa.spi.NativeQueryTupleTransformer$NativeTupleImpl.<init>(NativeQueryTupleTransformer.java:79) at org.hibernate.jpa.spi.NativeQueryTupleTransformer.transformTuple(NativeQueryTupleTransformer.java:29) at org.hibernate.jpa.spi.NativeQueryTupleTransformer.transformTuple(NativeQueryTupleTransformer.java:25) at org.hibernate.sql.results.internal.RowTransformerTupleTransformerAdapter.transformRow(RowTransformerTupleTransformerAdapter.java:30) at org.hibernate.sql.results.internal.StandardRowReader.readRow(StandardRowReader.java:109) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:198) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:33) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:443) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:166) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.list(JdbcSelectExecutorStandardImpl.java:91) at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:31) at org.hibernate.query.sql.internal.NativeSelectQueryPlanImpl.performList(NativeSelectQueryPlanImpl.java:105) at org.hibernate.query.sql.internal.NativeQueryImpl.doList(NativeQueryImpl.java:602) at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:363) at org.hibernate.query.Query.getResultList(Query.java:94) at com.example.demo.DemoApplicationTests.testNamedNativeQueries3(DemoApplicationTests.java:57){noformat} Test case: [https://github.com/isaul32/spring-data-jpa-named-native-query-bug|https:/...] Working test case (Hibernate 5): [https://github.com/isaul32/spring-data-jpa-named-native-query-bug/pull/1|...] ( https://hibernate.atlassian.net/browse/HHH-16119#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16119#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100214- sha1:d3cc1a2 )