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https://issues.apache.org/jira/browse/OPENJPA-2484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16545024#comment-16545024
]
Maia Everett commented on OPENJPA-2484:
---------------------------------------
The attached patch fixes the issue for me. I'm not sure that's the right
solution, but there is a precedent for that check elsewhere in the code.
> JPA-QL query with byte[] projection fails.
> ------------------------------------------
>
> Key: OPENJPA-2484
> URL: https://issues.apache.org/jira/browse/OPENJPA-2484
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 2.2.2
> Reporter: Thomas Darimont
> Priority: Major
> Attachments: openjpa-bytearray-bug.patch
>
>
> Given a User entity with a persistent byte[] field declared as:
> @Lob private byte[] binaryData;
> When executing the following JPA query:
> select u.binaryData from User u where u.id = :id
> {code:java}
> User user = new User();
> user.setBinaryData("TEST".getBytes());
> em.persist(user);
> Object result = em.createQuery("select u.binaryData from User u
> where u.id = :id").setParameter("id", user.getId())
> .getSingleResult();
> assertThat(result,is(notNullValue()));
> {code}
> The following exception is thrown:
> {code}
> <openjpa-2.3.0-r422266:1540826 nonfatal user error>
> org.apache.openjpa.persistence.ArgumentException: Query projections cannot
> include array, collection, or map fields. Invalid query: "select
> u.binaryData from User u where u.id = :id"
> at
> org.apache.openjpa.kernel.ExpressionStoreQuery$AbstractExpressionExecutor.assertNotContainer(ExpressionStoreQuery.java:328)
> at
> org.apache.openjpa.kernel.ExpressionStoreQuery$DataStoreExecutor.<init>(ExpressionStoreQuery.java:770)
> at
> org.apache.openjpa.kernel.ExpressionStoreQuery.newDataStoreExecutor(ExpressionStoreQuery.java:179)
> at
> org.apache.openjpa.kernel.QueryImpl.createExecutor(QueryImpl.java:749)
> at
> org.apache.openjpa.kernel.QueryImpl.compileForDataStore(QueryImpl.java:707)
> at
> org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:689)
> at org.apache.openjpa.kernel.QueryImpl.compile(QueryImpl.java:589)
> at
> org.apache.openjpa.persistence.EntityManagerImpl.createQuery(EntityManagerImpl.java:997)
> at
> org.apache.openjpa.persistence.EntityManagerImpl.createQuery(EntityManagerImpl.java:979)
> at
> org.apache.openjpa.persistence.EntityManagerImpl.createQuery(EntityManagerImpl.java:102)
> at
> org.example.domain.OpenJpaPlainJpaTests.foo(OpenJpaPlainJpaTests.java:301)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
> {code}
> Other JPA implementations like Hibernate or EclipseLink support this.
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