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https://issues.apache.org/jira/browse/CALCITE-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-3771:
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Labels: pull-request-available (was: )
> Support of TRIM function for SPARK dialect and improvement in HIVE Dialect
> --------------------------------------------------------------------------
>
> Key: CALCITE-3771
> URL: https://issues.apache.org/jira/browse/CALCITE-3771
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Dhirenda Gautam
> Priority: Major
> Labels: pull-request-available
>
> In current Calcite implementation for query : SELECT TRIM('ABC') for SPARK
> Dialect it gets translated into SELECT TRIM(BOTH ' ' FROM 'ABC') .
> But the proper query for SPARK is :: SELECT TRIM('ABC')
> Unparse logic for the trim has been handled in Spark dialect to convert the
> source Trim query into valid SPARK query.
>
> Also,In HIVE/SPARK dialect TRIM with two operand is not supported
> Eg: SELECT TRIM(BOTH 'a' from 'ABC') So its equivalent is REGEXP_REPLACE
> which is handle in unparseTrim function.
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