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https://issues.apache.org/jira/browse/FLINK-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15804204#comment-15804204
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ASF GitHub Bot commented on FLINK-4565:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2870#discussion_r94801864
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/scala/table/expressionDsl.scala
---
@@ -110,6 +111,9 @@ trait ImplicitExpressionOperations {
def asc = Asc(expr)
def desc = Desc(expr)
+
+ def in(subquery: Expression*) = In(expr, subquery)
+ def in(table: Table) = InSub(expr, table)
--- End diff --
Documentation is missing.
> Support for SQL IN operator
> ---------------------------
>
> Key: FLINK-4565
> URL: https://issues.apache.org/jira/browse/FLINK-4565
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Nikolay Vasilishin
>
> It seems that Flink SQL supports the uncorrelated sub-query IN operator. But
> it should also be available in the Table API and tested.
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