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https://issues.apache.org/jira/browse/DERBY-2483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dag H. Wanvik updated DERBY-2483:
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Derby Categories: [Performance]
> Reduce compilation time for queries with large IN lists made up of literals.
> ----------------------------------------------------------------------------
>
> Key: DERBY-2483
> URL: https://issues.apache.org/jira/browse/DERBY-2483
> Project: Derby
> Issue Type: Improvement
> Affects Versions: 10.3.1.4
> Reporter: A B
> Priority: Minor
>
> Pulled from the write-up for DERBY-47:
> As seen in the beforeAndAfter.html document attached to DERBY-47, the
> compilation/optimization time for a query with an IN list consisting of all
> literals is far larger than it is for a similar query in which the IN list
> consists of all parameters. Since the "probe predicate" optimization
> implemented as part of DERBY-47 should apply similarly to both types of
> queries, it would be good to figure out what it is about literals that makes
> for such a long compilation time (with respect to parameters), and to address
> that issue.
> Note that this relatively excessive compilation time was an issue even before
> the changes for DERBY-47 were committed.
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