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https://issues.apache.org/jira/browse/FLINK-6992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16062605#comment-16062605
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Timo Walther commented on FLINK-6992:
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Yes, the IN for a list of literals is contained in the PR. As far as I can
remember we could merge this part. The subquery part was a bit hacky, because
it was not valid for all subqueries. It was only done in `Table.filter` but
actually there are special `RexSubQuery` expressions and conversion rules from
Calcite that we should use if possible.
> add support for IN, NOT IN in tableAPI
> --------------------------------------
>
> Key: FLINK-6992
> URL: https://issues.apache.org/jira/browse/FLINK-6992
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Priority: Minor
>
> to support table.where('a in ("x", "y", "z"))
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