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https://issues.apache.org/jira/browse/FLINK-13777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther closed FLINK-13777.
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Resolution: Duplicate
Fixed as part of FLINK-15281.
> Introduce sql function wrappers and conversion to ExpressionConverter
> ---------------------------------------------------------------------
>
> Key: FLINK-13777
> URL: https://issues.apache.org/jira/browse/FLINK-13777
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Jingsong Lee
> Priority: Major
>
> For remove the extended calcite sql functions, we introduce wrappers to wrap
> flink FunctionDefinition:
> 1.Add SqlReturnTypeInferenceWrapper to wrap TypeStrategy
> 2.Add SqlOperandTypeInferenceWrapper to wrap InputTypeStrategy
> 3.Add SqlOperandTypeCheckerWrapper to wrap InputTypeValidator
> 4.Add SqlFunctionWrapper to wrap SqlFunction
> 5.Add SqlFunctionWrapper converter and Standard sql converter
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