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Posted to issues@beam.apache.org by "Sam Rohde (JIRA)" <ji...@apache.org> on 2019/01/04 00:24:00 UTC

[jira] [Commented] (BEAM-5829) SQL should probably not support GROUP BY or set operations on floating point numbers

    [ https://issues.apache.org/jira/browse/BEAM-5829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16733663#comment-16733663 ] 

Sam Rohde commented on BEAM-5829:
---------------------------------

[~kenn] ping

Can you please take a look?

> SQL should probably not support GROUP BY or set operations on floating point numbers
> ------------------------------------------------------------------------------------
>
>                 Key: BEAM-5829
>                 URL: https://issues.apache.org/jira/browse/BEAM-5829
>             Project: Beam
>          Issue Type: Bug
>          Components: dsl-sql, test-failures
>            Reporter: Kenneth Knowles
>            Assignee: Kenneth Knowles
>            Priority: Major
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> These are known to be super unreliable on most SQL engines, and generally indicate a programming error. Floating points numbers are intended as stand-ins for real numbers, for which equality (hence grouping and set operations) are undecidable. And our build is broken because of it.



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