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Posted to issues@beam.apache.org by "Rui Wang (JIRA)" <ji...@apache.org> on 2019/04/19 23:46:00 UTC

[jira] [Commented] (BEAM-7123) COUNT(*) should return 0 when input is empty

    [ https://issues.apache.org/jira/browse/BEAM-7123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16822260#comment-16822260 ] 

Rui Wang commented on BEAM-7123:
--------------------------------

This might be a bug of Beam core. Count.CountFn has a default value of 0. But CountFn was not called when input PCollection is empty. Need further investigation.

> COUNT(*) should return 0 when input is empty
> --------------------------------------------
>
>                 Key: BEAM-7123
>                 URL: https://issues.apache.org/jira/browse/BEAM-7123
>             Project: Beam
>          Issue Type: Bug
>          Components: dsl-sql
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: Major
>




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