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Posted to commits@pinot.apache.org by GitBox <gi...@apache.org> on 2019/02/17 04:59:37 UTC

[GitHub] xueyumusic opened a new issue #3851: Support variance and stddev aggregation

xueyumusic opened a new issue #3851: Support variance and stddev aggregation
URL: https://github.com/apache/incubator-pinot/issues/3851
 
 
   Variance and stddev are common aggregations in data statistic and analysis, maybe an improvement to support it. It includes `var_pop(population variance), var_sample(unbiased variance), stddev_pop(population standard deviation) and stddev_sample(sample standard deviation)`. 
   Submit a pr for var_pop first, if pinot could support this, will try to implement others then since they are similar and related..

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