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Posted to commits@beam.apache.org by "Kai Jiang (JIRA)" <ji...@apache.org> on 2017/07/13 08:18:00 UTC
[jira] [Comment Edited] (BEAM-2612) support variance builtin
aggregation function
[ https://issues.apache.org/jira/browse/BEAM-2612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16085347#comment-16085347 ]
Kai Jiang edited comment on BEAM-2612 at 7/13/17 8:17 AM:
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cc [~mingmxu]
After this ticket, I can work on STDDEV_POP, STDDEV_SAMP, COVAR_POP, COVAR_SAMP
was (Author: vectorijk):
After this ticket, I can work on STDDEV_POP, STDDEV_SAMP, COVAR_POP, COVAR_SAMP
> support variance builtin aggregation function
> ---------------------------------------------
>
> Key: BEAM-2612
> URL: https://issues.apache.org/jira/browse/BEAM-2612
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql
> Reporter: Kai Jiang
> Assignee: Kai Jiang
>
> two builtin aggregate functions
> VAR_POP
> the population variance (square of the population standard deviation)
> VAR_SAMP
> the sample variance (square of the sample standard deviation)
> https://calcite.apache.org/docs/reference.html#aggregate-functions
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