Jody Grassel created OPENJPA-2261:
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Summary: Query SQL Cache issue with NULL parameters
Key: OPENJPA-2261
URL: https://issues.apache.org/jira/browse/OPENJPA-2261
Project: OpenJPA
Issue Type: Bug
Components: query
Affects Versions: 2.2.0, 2.1.1, 2.1.0
Reporter: Jody Grassel
Assignee: Jody Grassel
The Query SQL Cache matches previously executed SQL for a given JPQL by using
the JPQL string itself for the key. As long as none of the predicate
parameters are NULL, this is fine, as the prepared statement's SQL remains
unchanged. Since SQL requires "column IS NULL" statements and not "column =
NULL", the approach used by OpenJPA's Query SQL Cache breaks and results with
bad getResultList() returns.
In the future (say, trunk), the Query SQL Cache needs more intelligence to
handle this situation, but for service releases the best way to handle this
issue is to disqualify queries with NULL parameters from the query cache.
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