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Posted to commits@beam.apache.org by "Kai Jiang (JIRA)" <ji...@apache.org> on 2017/07/13 08:14:00 UTC

[jira] [Created] (BEAM-2612) support variance builtin aggregation function

Kai Jiang created BEAM-2612:
-------------------------------

             Summary: 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: Xu Mingmin


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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