[jira] [Created] (CALCITE-4963) Extensibility of SqlDialectFactory lacks reusability of SqlDialectFactoryImpl.*

["Marco Jorge (Jira)" <ji...@apache.org>]

Marco Jorge created CALCITE-4963:
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             Summary: 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


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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