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https://issues.apache.org/jira/browse/FLINK-3505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske resolved FLINK-3505.
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Resolution: Resolved
Fix Version/s: 1.1.0
The JoinUnionTransposeRule was removed from the Flink rule set. It would have
pushed a join to all inputs of a union and hence create additional joins and
probably additional processing overhead.
> JoinUnionTransposeRule fails to push Join past Union.
> -----------------------------------------------------
>
> Key: FLINK-3505
> URL: https://issues.apache.org/jira/browse/FLINK-3505
> Project: Flink
> Issue Type: Bug
> Components: Table API
> Reporter: Chengxiang Li
> Fix For: 1.1.0
>
>
> {noformat}
> val unionDs = ds1
> .unionAll(ds2.select('a, 'b, 'c))
> .join(ds3)
> .where('a === 'k)
> .select('a, 'b, 'l)
> {noformat}
> For this query, JoinUnionTransposeRule fails to push push Join past Union.
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