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Adding STDDEV builtin.

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Change-Id: I79e5aee1e9e879aa2d09078ab45bc149675e1d4a
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2341
Reviewed-by: Victor Bittorf <victor.bittorf@cloudera.com>
Tested-by: jenkins
(cherry picked from commit a42c375d933c0b7ffe7c9b6702777679492d7ad6)
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2464
This commit is contained in:
Victor Bittorf
2014-04-11 09:51:18 -07:00
committed by jenkins
parent cb5b2f0b38
commit 6f31dc7f8a
4 changed files with 265 additions and 2 deletions
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70
testdata/workloads/functional-query/queries/QueryTest/aggregation.test vendored
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@@ -1,5 +1,75 @@
====
---- QUERY
# test a larger dataset, includes nulls
# the exact result could vary slightly due to numeric instability
# 0.001 is a conservative upperbound on the possible difference in results
SELECT abs(cast(variance(tinyint_col) as double) - 6.66741) < 0.001,
abs(cast(variance(double_col) as double) - 8484680) < 0.001
from alltypesagg
---- TYPES
boolean, boolean
---- RESULTS
true,true
====
---- QUERY
# No tuples processed (should return null)
SELECT variance(tinyint_col), stddev(smallint_col), variance_pop(int_col),
stddev_pop(bigint_col)
from alltypesagg WHERE id = -9999999
---- TYPES
string, string, string, string
---- RESULTS
'NULL','NULL','NULL','NULL'
====
---- QUERY
# exactly 1 tuple processed (variance & stddev are 0)
SELECT variance(tinyint_col), stddev(smallint_col), variance_pop(int_col),
stddev_pop(bigint_col)
from alltypesagg WHERE id = 1006
---- TYPES
string, string, string, string
---- RESULTS
'0','0','0','0'
====
---- QUERY
# Includes one row which is null
SELECT variance(tinyint_col), variance(smallint_col), variance(int_col),
variance(bigint_col), variance(float_col), variance(double_col)
from alltypesagg WHERE id >= 1000 AND id < 1006
---- TYPES
string, string, string, string, string, string
---- RESULTS
'2.5','2.5','2.5','250','3.025','255.025'
====
---- QUERY
SELECT variance_pop(tinyint_col), variance_pop(smallint_col), variance_pop(int_col),
variance_pop(bigint_col), variance_pop(float_col), variance_pop(double_col)
from alltypesagg WHERE id >= 1000 AND id < 1006
---- TYPES
string, string, string, string, string, string
---- RESULTS
'2','2','2','200','2.42','204.02'
====
---- QUERY
SELECT stddev(tinyint_col), stddev(smallint_col), stddev(int_col), stddev(bigint_col),
stddev(float_col), stddev(double_col)
from alltypesagg WHERE id >= 1000 AND id < 1006
---- TYPES
string, string, string, string, string, string
---- RESULTS
'1.58114','1.58114','1.58114','15.8114','1.73925','15.9695'
====
---- QUERY
# no grouping exprs, cols contain nulls except for bool cols
SELECT stddev_pop(tinyint_col), stddev_pop(smallint_col), stddev_pop(int_col),
stddev_pop(bigint_col), stddev_pop(float_col), stddev_pop(double_col)
from alltypesagg WHERE id >= 1000 AND id < 1006
---- TYPES
string, string, string, string, string, string
---- RESULTS
'1.41421','1.41421','1.41421','14.1421','1.55563','14.2836'
====
---- QUERY
# no grouping exprs, cols contain nulls except for bool cols
select count(bool_col), min(bool_col), max(bool_col)
from alltypesagg