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Posted to issues@beam.apache.org by "Rui Wang (JIRA)" <ji...@apache.org> on 2019/01/14 23:24:00 UTC

[jira] [Work started] (BEAM-6427) INTERSECT ALL is not compatible with SQL standard

     [ https://issues.apache.org/jira/browse/BEAM-6427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on BEAM-6427 started by Rui Wang.
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> INTERSECT ALL is not compatible with SQL standard
> -------------------------------------------------
>
>                 Key: BEAM-6427
>                 URL: https://issues.apache.org/jira/browse/BEAM-6427
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-sql
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> say Row R appears m times on one side and n times on another side. 
> Beam's  INTERSECT ALL is implemented to return MAX(m, n).
> And SQL1999 standard says INTERSECT ALL should return MIN(m, n).



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