[OPENJPA-1575] Query parameter on externalized field breaks Prepared Query Cache

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-beta2
• Fix Version/s: 2.0.0-beta3
• Component/s: kernel, query
• Assignee: Pinaki Poddar
• Reporter: Pinaki Poddar
• Created: 15/Mar/10 20:07
• Updated: 26/Apr/11 03:35
• Resolved: 15/Mar/10 21:26

Description

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.

Issue Links

• is duplicated by: OPENJPA-1941 Criteria query returns wrong result when query cache is enabled