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https://issues.apache.org/jira/browse/CALCITE-4963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liya Fan closed CALCITE-4963.
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Resolved in release 1.30.0 (2022-03-20)
> Extensibility of SqlDialectFactory lacks reusability of
> SqlDialectFactoryImpl.*
> -------------------------------------------------------------------------------
>
> Key: CALCITE-4963
> URL: https://issues.apache.org/jira/browse/CALCITE-4963
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Marco Jorge
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.30.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> _(nicetities first - great project and thanks all for the great work)_
> Although it's possible to extend the SqlDialectFactory, the custom
> implementation cannot reuse any of the behaviour of the default
> SqlDialectFactoryImpl. The default SqlDialectFactoryImpl has lots of
> important/reusable behaviour such as #getCasing, #isCaseSensitive,
> #getNullCollation or even the default decisioning in the #create method.
> If any user needs to provide a custom SqlDialect yet still support the
> existing SqlDialects the user needs to copy the whole SqlDialectFactoryImpl
> to make the custom changes.
> This request is to make the default behavior in SqlDialectFactoryImpl
> reusable so that extensions don't need to fork a whole class.
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