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From "Helen Xu (JIRA)" <>
Subject [jira] [Updated] (OPENJPA-2295) speed up query metadata lookup
Date Tue, 22 Jan 2013 20:46:13 GMT


Helen Xu updated OPENJPA-2295:

    Attachment: OPENJPA-2295a.patch
> speed up query metadata lookup
> ------------------------------
>                 Key: OPENJPA-2295
>                 URL:
>             Project: OpenJPA
>          Issue Type: New Feature
>          Components: performance, query
>    Affects Versions: 2.2.0, 2.3.0
>            Reporter: Helen Xu
>            Assignee: Helen Xu
>            Priority: Minor
>             Fix For: 2.3.0, 2.2.2
>         Attachments: OPENJPA-2295a.patch, OPENJPA-2295.patch
> I noticed right now the queryKey is used as the map key for metadataRepository._queries,
but when it goes to look up, it always uses query name. The query metadata lookup would be
faster if we switch to query name as the key.
> I double checked the JPA Spec and OPENJPA menu, it seems only support the named query
creation using query name, which means the query name should be unique in one EntityManager.
It doesn't matter in which entity the query is defined. So using name as the map look up key
should be good enough.
> when there are two queries with the same name defined in the different entities, it will
only keep the query metadata for the first loaded named query and ignore the rest plus log
a warning message like this:
>  WARN   [main] openjpa.MetaData - Ignoring duplicate query "X" in "class org.apache.openjpa.A".
A query with the same name been already declared in "class org.apache.openjpa.B".

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