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https://issues.apache.org/jira/browse/FLINK-2985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15360228#comment-15360228
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ASF GitHub Bot commented on FLINK-2985:
---------------------------------------
Github user gallenvara commented on the issue:
https://github.com/apache/flink/pull/2078
@fhueske the failure of CI build is relevant with
`testJoinWithDisjunctivePred` in `JoinITCase`. The case is `val joinT =
ds1.join(ds2).filter('a === 'd && ('b === 'e || 'b === 'e - 10)).select('c,
'g)`. I still don't quite understand why this case running failed after some
debug work. And when i changed the filter condition with `('a === 'd && ('b ===
'e || 'b === 'h - 10))` (or replace with `'d` `'f`), it can work sucessfully
without exception.
> Allow different field names for unionAll() in Table API
> -------------------------------------------------------
>
> Key: FLINK-2985
> URL: https://issues.apache.org/jira/browse/FLINK-2985
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Priority: Minor
>
> The recently merged `unionAll` operator checks if the field names of the left
> and right side are equal. Actually, this is not necessary. The union operator
> in SQL checks only the types and uses the names of left side.
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