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https://issues.apache.org/jira/browse/OPENJPA-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Albert Lee closed OPENJPA-2162.
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> Avoid delimited identifier processing if it's not required by application
> -------------------------------------------------------------------------
>
> Key: OPENJPA-2162
> URL: https://issues.apache.org/jira/browse/OPENJPA-2162
> Project: OpenJPA
> Issue Type: Improvement
> Components: jdbc, performance, sql
> Affects Versions: 2.3.0, 2.2.1
> Reporter: Kevin Sutter
> Assignee: Kevin Sutter
> Fix For: 2.3.0, 2.2.1
>
>
> Supporting delimited identifiers causes some unnecessary overhead if the
> application and associated database doesn't use them or support them. This
> change will surface the DBDictionary property supportsDelimitedIdentifiers.
> Currently, this property gets set by querying the database to see if the
> database supports this capability. With this change, we will first check if
> this property has been explicitly set. If explicitly set, then we'll use
> that value. Otherwise, we will default back to querying the database to
> determine whether to support delimited identifiers or not.
> Here's an example of the property to set to turn off the delimited identifier
> support:
> <property name="openjpa.jdbc.DBDictionary"
> value="db2(SupportsDelimitedIdentifiers=false)"/>
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