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https://issues.apache.org/jira/browse/DERBY-6751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Hillegas updated DERBY-6751:
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Attachment: derby-6751-02-aa-cacheLCC.diff
Thanks for that theory, Knut. Attaching derby-6751-02-aa-cacheLCC.diff. This
patch makes the callers of EmbedConnection.getLanguageConnection() cache the
lcc so that the lcc won't have to be re-read repeatedly inside tight loops. I
will run tests.
Hopefully, this will address the performance regression Knut saw.
Touches the following files:
M java/engine/org/apache/derby/impl/jdbc/ConnectionChild.java
M java/engine/org/apache/derby/jdbc/EmbedPooledConnection.java
M java/engine/org/apache/derby/jdbc/EmbedXAResource.java
> Prevent user code from getting the LanguageConnectionContext from an
> EmbedConnection
> ------------------------------------------------------------------------------------
>
> Key: DERBY-6751
> URL: https://issues.apache.org/jira/browse/DERBY-6751
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.12.0.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Labels: derby_backport_reject_10_11
> Fix For: 10.12.0.0
>
> Attachments: derby-6751-01-aa-usederbyinternals.diff,
> derby-6751-01-ab-usederbyinternals.diff,
> derby-6751-01-ad-usederbyinternals.diff, derby-6751-02-aa-cacheLCC.diff
>
>
> User code can cast a java.sql.Connection to an EmbedConnection and then get
> the LanguageConnectionContext by calling
> EmbedConnection.getLanguageConnection(). We should prevent user code from
> doing this.
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