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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2020/03/25 06:54:20 UTC

[GitHub] [druid] ruibinx opened a new issue #9561: Support SQL function STDDEV/VARIANCE on Variance column

ruibinx opened a new issue #9561: Support SQL function STDDEV/VARIANCE on Variance column 
URL: https://github.com/apache/druid/issues/9561
 
 
   ### Description
   
   Current SQL functions STDDEV/VARIANCE only support numeric column types judging by code: 
   https://github.com/apache/druid/blob/ff59d2e78bd3949e46858bc2f9882db9a7d2a186/extensions-core/stats/src/main/java/org/apache/druid/query/aggregation/variance/sql/BaseVarianceSqlAggregator.java#L103
   
   ### Motivation
   
   Support Variance Type for STDDEV/VARIANCE could make use of pre-calculated variance column value.

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