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From "Andrus Adamchik (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (CAY-1700) Split long DISJOINT_BY_ID prefetch query on several smaller queries
Date Mon, 07 May 2012 07:52:18 GMT

     [ https://issues.apache.org/jira/browse/CAY-1700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrus Adamchik closed CAY-1700.
--------------------------------

    Resolution: Fixed

Ah, good catch. thanks for spotting and fixing this. Just applied the patch.
                
> Split long DISJOINT_BY_ID prefetch query on several smaller queries
> -------------------------------------------------------------------
>
>                 Key: CAY-1700
>                 URL: https://issues.apache.org/jira/browse/CAY-1700
>             Project: Cayenne
>          Issue Type: Improvement
>          Components: Core Library
>    Affects Versions: 3.1M4
>            Reporter: Andrei Veprev
>             Fix For: 3.1M4
>
>         Attachments: CAY-1700-typo.patch, CAY-1700.patch
>
>
> It is improvement for CAY-1681. From Andrus' comment:
> And one more thing we will probably have to implement - breaking down OR query if it
gets too long. This is a real problem which has been repeatedly mentioned in the context of
the paginated queries, and in fact solved in IncrementalFaultList. see IncrementalFaultList.resolveInterval
- it checks the number of clauses in the qualifier against 'maxFetchSize'. We may need to
make "maxFetchSize" a container property used by IncrementalFaultList as well as our prefetch
strategy, and take it into account in the later.

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