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https://issues.apache.org/jira/browse/FLINK-39652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske resolved FLINK-39652.
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Fix Version/s: 2.4.0
Resolution: Fixed
> Improve documentation for regexp functions
> ------------------------------------------
>
> Key: FLINK-39652
> URL: https://issues.apache.org/jira/browse/FLINK-39652
> Project: Flink
> Issue Type: Sub-task
> Components: Documentation, Table SQL / API
> Reporter: Ramin Gharib
> Assignee: Ramin Gharib
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.0
>
>
> REGEXP_EXTRACT, REGEXP_REPLACE, and REGEXP docs omit NULL handling,
> invalid-regex behavior, and argument types. After the umbrella's plan-time
> validation lands, literal regexes that fail to compile become
> ValidationExceptions at planning time — this needs to be documented.
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