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https://issues.apache.org/jira/browse/FLINK-4565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16110788#comment-16110788
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ASF GitHub Bot commented on FLINK-4565:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4404#discussion_r130854117
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/fieldExpression.scala
---
@@ -138,6 +138,25 @@ case class WindowReference(name: String, tpe:
Option[TypeInformation[_]] = None)
override def toString: String = s"'$name"
}
+case class TableReference(name: String, table: Table) extends Attribute {
--- End diff --
`TableReference` shouldn't extend `Attribute` IMO.
We can make it `extend LeafExpression with NamedExpression`.
> 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: Timo Walther
>
> 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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