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https://issues.apache.org/jira/browse/OPENJPA-208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487349
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Marc Prud'hommeaux commented on OPENJPA-208:
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This appears to have been introduced by the commits for the fix for OPENJPA-168.
> NoResultException and NonUniqueResultException are not thrown when expected
> ---------------------------------------------------------------------------
>
> Key: OPENJPA-208
> URL: https://issues.apache.org/jira/browse/OPENJPA-208
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 0.9.6
> Reporter: Marc Prud'hommeaux
> Assigned To: Marc Prud'hommeaux
>
> When calling Query.getSingleResult() on a query that either has no result or
> multiple results, either a NoResultException and NonUniqueResultException
> (respectively) should be thrown in accordance with section 3.6.1 of the JPA
> spec. Instead, we appear to throw a
> org.apache.openjpa.persistence.InvalidStateException:
> org.apache.openjpa.persistence.InvalidStateException: The query on candidate
> type "class com.sun.ts.tests.ejb30.persistence.query.apitests.Department"
> with filter "select d.name from Department d where d.id > 1" was configured
> to have a unique result, but more than one instance matched the query.
> at org.apache.openjpa.kernel.QueryImpl.singleResult(QueryImpl.java:1282)
> at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1207)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:982)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:791)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:761)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:757)
> at
> org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:514)
> at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:225)
> at
> org.apache.openjpa.persistence.QueryImpl.getSingleResult(QueryImpl.java:287)
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