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https://issues.apache.org/jira/browse/FLINK-6584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16217039#comment-16217039
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ASF GitHub Bot commented on FLINK-6584:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4199#discussion_r146580553
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/batch/sql/validation/GroupWindowValidationTest.scala
---
@@ -79,4 +79,32 @@ class GroupWindowValidationTest extends TableTestBase {
"GROUP BY TUMBLE(ts, INTERVAL '4' MINUTE)"
util.verifySql(sql, "n/a")
}
+
+ @Test(expected = classOf[TableException])
--- End diff --
Please add comments why the tests are expected to fail.
> Support multiple consecutive windows in SQL
> -------------------------------------------
>
> Key: FLINK-6584
> URL: https://issues.apache.org/jira/browse/FLINK-6584
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Blocker
> Fix For: 1.4.0
>
>
> Right now, the Table API supports multiple consecutive windows as follows:
> {code}
> val table = stream.toTable(tEnv, 'rowtime.rowtime, 'int, 'double, 'float,
> 'bigdec, 'string)
> val t = table
> .window(Tumble over 2.millis on 'rowtime as 'w)
> .groupBy('w)
> .select('w.rowtime as 'rowtime, 'int.count as 'int)
> .window(Tumble over 4.millis on 'rowtime as 'w2)
> .groupBy('w2)
> .select('w2.rowtime, 'w2.end, 'int.count)
> {code}
> Similar behavior should be supported by the SQL API as well. We need to
> introduce a new auxiliary group function, but this should happen in sync with
> Apache Calcite.
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