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From "Pinaki Poddar (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (OPENJPA-1575) Query parameter on externalized field breaks Prepared Query Cache
Date Mon, 15 Mar 2010 21:27:27 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pinaki Poddar resolved OPENJPA-1575.
------------------------------------

    Resolution: Fixed

> Query parameter on externalized field breaks Prepared Query Cache
> -----------------------------------------------------------------
>
>                 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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