[
http://issues.apache.org/jira/browse/JDO-246?page=comments#action_12364734 ]
Erik Bengtson commented on JDO-246:
-----------------------------------
I will do a small change in your example before expanding it.
------------------------
Employee = {"Employee1","Employee2","Employee3"}
Department = {"dept1","dept2","dept3"}
Department.employees =
{{"Employee1","Employee3"},{"Employee2"},{"Employee1","Employee2"}}
SELECT employee.name, employee.manager.lastname FROM
org.apache.jdo.tck.pc.company.Department WHERE employees.contains(employee)
VARIABLES Employee employee
Here, the results should be:
{"Employee1", "emp2Last"}
{"Employee3", null}
{"Employee2", "emp2Last"}
{"Employee1", "emp2Last"}
{"Employee2", "emp2Last"}
Simply removing employee.id should not change the number of rows of the result.
It should only change the number of columns returned by the query.
------------------------
Now we add:
Resource = {"Resource1","Resource2","Resource3"}
Department.resources =
{{"Resource2"},{"Resource2","Resource3","Resource1"},{"Resource1","Resource2"}}
SELECT employee.name, employee.manager.lastname, resource.name FROM
org.apache.jdo.tck.pc.company.Department WHERE employees.contains(employee) &&
resources.contains(resource) VARIABLES Employee employee, Resource resource
Here the results can vary depending how you expect employee and resource sets
be joined
{"Employee1", "emp2Last", "Resource2"}
{"Employee3", null, null}
{"Employee2", "emp2Last","Resource2"}
{null,null,"Resource3"}
{null,null,"Resource1"}
{"Employee1", "emp2Last","Resource1"}
{"Employee2", "emp2Last","Resource2"}
What does && or || operators would mean here?
Any other thoughts?
> JPOX eliminates duplicates in the query result although DISTINCT is not
> specified.
> ----------------------------------------------------------------------------------
>
> Key: JDO-246
> URL: http://issues.apache.org/jira/browse/JDO-246
> Project: JDO
> Type: Bug
> Components: tck20
> Reporter: Michael Watzek
> Assignee: Erik Bengtson
>
> Test case NPEInResultExpr fails because the result of the query below is
> expected to contain duplicates. JPOX eliminates the duplicates.
> 14:22:55,046 (main) DEBUG [org.apache.jdo.tck] - Executing API query: SELECT
> employee.manager.lastname FROM org.apache.jdo.tck.pc.company.Department WHERE
> employees.contains(employee) VARIABLES Employee employee
> 14:22:55,078 (main) DEBUG [org.apache.jdo.tck] - Query result: [emp2Last,
> null]
> 14:22:55,078 (main) DEBUG [org.apache.jdo.tck] - Wrong query result:
> expected: [emp2Last, null, emp2Last, emp2Last, emp2Last]
> got: [emp2Last, null]
> 14:22:55,078 (main) INFO [org.apache.jdo.tck] - Exception during setUp or
> runtest:
> junit.framework.AssertionFailedError: Assertion A14.6.9-4 (NPEInResultExpr)
> failed:
> Wrong query result:
> expected: [emp2Last, null, emp2Last, emp2Last, emp2Last]
> got: [emp2Last, null]
> at junit.framework.Assert.fail(Assert.java:47)
> at org.apache.jdo.tck.JDO_Test.fail(JDO_Test.java:546)
> at org.apache.jdo.tck.query.QueryTest.queryFailed(QueryTest.java:500)
> at
> org.apache.jdo.tck.query.QueryTest.checkQueryResultWithoutOrder(QueryTest.java:485)
> at org.apache.jdo.tck.query.QueryTest.execute(QueryTest.java:1189)
> at org.apache.jdo.tck.query.QueryTest.execute(QueryTest.java:1029)
> at
> org.apache.jdo.tck.query.QueryTest.executeAPIQuery(QueryTest.java:966)
> at
> org.apache.jdo.tck.query.QueryTest.executeAPIQuery(QueryTest.java:946)
> at
> org.apache.jdo.tck.query.result.NPEInResultExpr.testPositive(NPEInResultExpr.java:106)
> 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:324)
> at junit.framework.TestCase.runTest(TestCase.java:154)
> at org.apache.jdo.tck.JDO_Test.runBare(JDO_Test.java:204)
> at junit.framework.TestResult$1.protect(TestResult.java:106)
> at junit.framework.TestResult.runProtected(TestResult.java:124)
> at junit.framework.TestResult.run(TestResult.java:109)
> at junit.framework.TestCase.run(TestCase.java:118)
> at junit.framework.TestSuite.runTest(TestSuite.java:208)
> at junit.framework.TestSuite.run(TestSuite.java:203)
> at junit.framework.TestSuite.runTest(TestSuite.java:208)
> at junit.framework.TestSuite.run(TestSuite.java:203)
> at junit.textui.TestRunner.doRun(TestRunner.java:116)
> at junit.textui.TestRunner.doRun(TestRunner.java:109)
> at
> org.apache.jdo.tck.util.BatchTestRunner.start(BatchTestRunner.java:120)
> at org.apache.jdo.tck.util.BatchTestRunner.main(BatchTestRunner.java:95)
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