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https://issues.apache.org/jira/browse/CALCITE-3663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17006634#comment-17006634
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Dhirenda Gautam commented on CALCITE-3663:
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Currently working on this and will raise the PR soon
> Support for TRIM function in Bigquery dialect
> ---------------------------------------------
>
> Key: CALCITE-3663
> URL: https://issues.apache.org/jira/browse/CALCITE-3663
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Dhirenda Gautam
> Priority: Major
>
> When we run query SELECT TRIM('ABC') for big-query Dialect
> we expect SELECT TRIM('ABC')，but get SELECT TRIM(BOTH ' ' FROM 'ABC') which
> is not a valid query in Big-Query.
> Similary below query
> SELECT TRIM(BOTH 'a' from 'ABC')
> SELECT TRIM(LEADING ' ' from 'ABC')
> SELECT TRIM(TRAILING ' ' from 'ABC') are not getting converted into validate
> Query format.
> Unparse logic for the trim has been handle in Big-query dialect to convert
> the source Trim query into valid big-query query.
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