Query parameter on externalized field breaks Prepared Query Cache
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Key: OPENJPA-1575
URL: https://issues.apache.org/jira/browse/OPENJPA-1575
Project: OpenJPA
Issue Type: Bug
Components: kernel, query
Affects Versions: 2.0.0-beta2
Reporter: Pinaki Poddar
Assignee: Pinaki Poddar
Fix For: 2.0.0
If field value has been externalized and the query is using a parameter for
that field, caching its SQL breaks because re-parametrization of the SQL can
not externalize the user supplied parameter value through the field. The worse
is the query is cached anyway and its parameter substituted with (wrong)
non-externalized, user-supplied value -- resulting in wrong result.
Currently we will detect such usage and exclude the the query being cached.
However, we can consider a mechanics to capture the parametrized fields in a
query expression tree and appropriately pass the user values through the
fields' externalizer in future.
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