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https://issues.apache.org/jira/browse/ASTERIXDB-2459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16648447#comment-16648447
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ASF subversion and git services commented on ASTERIXDB-2459:
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Commit ab4bed0cee6a8b4d727ebb67c89da1c983c70487 in asterixdb's branch
refs/heads/master from [~James Fang]
[ https://git-wip-us.apache.org/repos/asf?p=asterixdb.git;h=ab4bed0 ]
[ASTERIXDB-2459][FUN] Add sttdev() aggregate function
- user model changes: yes
- storage format changes: no
- interface changes: no
Details:
1. Added stddev aggregation function and test cases
2. Added stddev to documentation and fixed some typos
3. Added serializable aggregate optimizer test
4. Change IncompatibleTypeException in aggregates to be deterministic
commit 26edb576f55a3d2308996f054a58ad43ab910f9b
Author: James Fang <jfang...@ucr.edu>
Date: Fri Oct 5 15:10:37 2018 -0700
Change-Id: Ia709669a9d20358f11ad28f453ae8ad8551f6334
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2990
Tested-by: Jenkins <jenk...@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenk...@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenk...@fulliautomatix.ics.uci.edu>
Reviewed-by: Dmitry Lychagin <dmitry.lycha...@couchbase.com>
> Adding Postgres statistic aggregates (single variable)
> ------------------------------------------------------
>
> Key: ASTERIXDB-2459
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2459
> Project: Apache AsterixDB
> Issue Type: Improvement
> Components: FUN - Functions
> Reporter: James Fang
> Priority: Minor
>
> We are currently missing some of the aggregation functions that exist in
> PostgresSQL and among these are the single variable statistics functions:
> stddev, stddev_pop, variance, variance_pop, skewness and kurtosis.
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