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https://issues.apache.org/jira/browse/OPENJPA-2165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Richard Zowalla resolved OPENJPA-2165.
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Resolution: Fixed
Already fixed in an earlier release (DelayCollectionLoading (df8d3c441));
closing.
> Allow lazy proxy relationships to add or remove elements without triggering a
> load
> ----------------------------------------------------------------------------------
>
> Key: OPENJPA-2165
> URL: https://issues.apache.org/jira/browse/OPENJPA-2165
> Project: OpenJPA
> Issue Type: New Feature
> Components: jdbc, kernel, performance
> Affects Versions: 2.2.1, 2.3.0
> Reporter: Jeremy Bauer
> Assignee: Jeremy Bauer
> Priority: Major
>
> When adding or removing elements from a non-database-ordered (no order by or
> order column - which require strict order to be maintained) lazy proxied
> collection which is a relationship to other entities, OpenJPA loads the
> collection before performing the operation. This can be very expensive if an
> operation is only adding or removing items from the collection. I created a
> feature that, when switched on, allows non-indexed add and remove operations
> to be performed on a collection without triggering a load. The collection
> will get loaded (and reconciled, if necessary) when an operation is performed
> that requires a load, such as iteration, size, isEmpty, etc. Currently, the
> feature can be enabled for the using this new attribute on the ProxyManager.
> <property name="openjpa.ProxyManager" value="delayCollectionLoading=true"/>
> The basics have been added to field mappings/metadata such that this could be
> enabled on a per-field basis in the future.
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