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https://issues.apache.org/jira/browse/IMPALA-13566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-13566 started by Xuebin Su.
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> Expose query cancellation status to UDF interface
> -------------------------------------------------
>
> Key: IMPALA-13566
> URL: https://issues.apache.org/jira/browse/IMPALA-13566
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Riza Suminto
> Assignee: Xuebin Su
> Priority: Major
>
> Some Impala UDF implementation can be complex and time consuming. If UDF
> evaluation happen in uninterruptible call path like in Scan Predicate
> evaluation, UDF may block query fragment cancellation for long time. We
> should consider exposing query cancellation status to UDF interface. UDF
> implementation can periodically check for this status and fail fast upon
> finding cancellation.
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