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https://issues.apache.org/jira/browse/FLINK-10595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328538#comment-17328538
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Flink Jira Bot commented on FLINK-10595:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Support patterns that can produce empty matches
> -----------------------------------------------
>
> Key: FLINK-10595
> URL: https://issues.apache.org/jira/browse/FLINK-10595
> Project: Flink
> Issue Type: Sub-task
> Components: Library / CEP, Table SQL / API
> Reporter: Dawid Wysakowicz
> Priority: Major
> Labels: stale-major
>
> CEP library does not emit empty matches. In order to be SQL standard
> compliant we explicitly forbid patterns that can produce empty
> matches(patterns that have only optional states) e.g A*
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