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From "Aljoscha Krettek (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3792) RowTypeInfo equality should not depend on field names
Date Wed, 20 Apr 2016 14:45:25 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250012#comment-15250012
] 

Aljoscha Krettek commented on FLINK-3792:
-----------------------------------------

What would be the field names (and types) of the resulting union stream?

> RowTypeInfo equality should not depend on field names
> -----------------------------------------------------
>
>                 Key: FLINK-3792
>                 URL: https://issues.apache.org/jira/browse/FLINK-3792
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Vasia Kalavri
>
> Currently, two Rows with the same field types but different field names are not considered
equal by the Table API and SQL. This behavior might create problems, e.g. it makes the following
union query fail:
> {code}
> SELECT STREAM a, b, c FROM T1 UNION ALL 
> (SELECT STREAM d, e, f FROM T2 WHERE d < 3)
> {code}
> where a, b, c and d, e, f are fields of corresponding types.
> {code}
> Cannot union streams of different types: org.apache.flink.api.table.Row(a: Integer, b:
Long, c: String) and org.apache.flink.api.table.Row(d: Integer, e: Long, f: String)
> {code}



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