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https://issues.apache.org/jira/browse/FLINK-16332?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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lincoln lee closed FLINK-16332.
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Resolution: Fixed
> Support un-ordered mode for async lookup join
> ---------------------------------------------
>
> Key: FLINK-16332
> URL: https://issues.apache.org/jira/browse/FLINK-16332
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Runtime
> Reporter: Jark Wu
> Priority: Not a Priority
> Labels: auto-deprioritized-major, auto-deprioritized-minor
>
> Currently, we only support "ordered" mode for async lookup join. Because the
> ordering in streaming SQL is very important, the accumulate and retract
> messages shoudl be in ordered. If messages are out of order, the result will
> be wrong.
> The "un-ordered" mode can be enabled by a job configuration. But it will be a
> prefered option. Only if it doesn't affect the order of acc/retract messages
> (e.g. it is just an append-only stream), the "un-ordered" mode will be
> enabled.
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