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BUG#3190 fix (request for STDDEV_SAMP, VAR_SAMP).

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This bug is also known as WL#1639.


mysql-test/r/func_group.result:
  Test case for stddev_pop, var_pop, stddev_samp, var_samp was added.
mysql-test/t/func_group.test:
  Test case for stddev_pop, var_pop, stddev_samp, var_samp was added.
sql/item_sum.cc:
  New functions stddev_samp and var_samp were added.
sql/item_sum.h:
  New functions stddev_samp and var_samp were added.
sql/lex.h:
  New functions stddev_pop, var_pop, stddev_samp and var_samp were added.
sql/sql_yacc.yy:
  New functions stddev_pop, var_pop, stddev_samp and var_samp were added.
This commit is contained in:
unknown 2005-02-25 22:19:04 +04:00
commit d339dd13cd
6 changed files with 49 additions and 16 deletions
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7
mysql-test/r/func_group.result
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@ -804,3 +804,10 @@ select cast(min(ifl) as decimal(5,2)) from t3;
cast(min(ifl) as decimal(5,2))
1.00
drop table t1, t2, t3;
CREATE TABLE t1 (id int(11),value1 float(10,2));
INSERT INTO t1 VALUES (1,0.00),(1,1.00), (1,2.00), (2,10.00), (2,11.00), (2,12.00), (2,13.00);
select id, stddev_pop(value1), var_pop(value1), stddev_samp(value1), var_samp(value1) from t1 group by id;
id stddev_pop(value1) var_pop(value1) stddev_samp(value1) var_samp(value1)
1 0.816497 0.666667 1.000000 1.000000
2 1.118034 1.250000 1.290994 1.666667
DROP TABLE t1;