tree ccf55b8b0b4ab01a779363c44cd2f32058e7da1d
parent 1571c93343902a9483050e5eb8416b09e816ce85
author Dmitry Lychagin <dmitry.lychagin@couchbase.com> 1552675089 -0700
committer Dmitry Lychagin <dmitry.lychagin@couchbase.com> 1552932209 -0700

[NO ISSUE][FUN] Add aliases for stddev_*(), var_*() functions

- user model changes: yes
- storage format changes: no
- interface changes: no

Details:
- Support aliases for SQL aggregate functions
- Add function aliases: stddev() -> stddev_samp(),
   variance() -> var_samp(), variance_samp() -> var_samp(),
   variance_pop() -> var_pop()
- stddev_pop() and var_pop() must return 0 if input is a single item

Change-Id: I0fe04164164726cfb4e17f951f0fd6c2a823c162
Reviewed-on: https://asterix-gerrit.ics.uci.edu/3278
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ali Alsuliman <ali.al.solaiman@gmail.com>