Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
M
mariadb
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
mariadb
Commits
f0f9a24e
Commit
f0f9a24e
authored
Dec 22, 2006
by
unknown
Browse files
Options
Browse Files
Download
Plain Diff
Merge tsmith@bk-internal.mysql.com:/home/bk/mysql-5.0-maint
into siva.hindu.god:/usr/home/tim/m/bk/50
parents
b4005afb
01e98327
Changes
5
Expand all
Hide whitespace changes
Inline
Side-by-side
Showing
5 changed files
with
494 additions
and
244 deletions
+494
-244
BitKeeper/etc/collapsed
BitKeeper/etc/collapsed
+1
-0
mysql-test/r/func_group.result
mysql-test/r/func_group.result
+267
-0
mysql-test/t/func_group.test
mysql-test/t/func_group.test
+92
-0
sql/item_sum.cc
sql/item_sum.cc
+120
-238
sql/item_sum.h
sql/item_sum.h
+14
-6
No files found.
BitKeeper/etc/collapsed
View file @
f0f9a24e
...
@@ -29,3 +29,4 @@
...
@@ -29,3 +29,4 @@
4554a95d7txO1DuO9G3nAizI3SkFAA
4554a95d7txO1DuO9G3nAizI3SkFAA
4554b3722d71SbPiI2Gx-RhbZjmuIQ
4554b3722d71SbPiI2Gx-RhbZjmuIQ
4558b3d73Cxjlb7Wv1oytdSTthxDfw
4558b3d73Cxjlb7Wv1oytdSTthxDfw
45771031yRCoM_ZfONdYchPvVEgLRg
mysql-test/r/func_group.result
View file @
f0f9a24e
...
@@ -1029,6 +1029,273 @@ t1 CREATE TABLE `t1` (
...
@@ -1029,6 +1029,273 @@ t1 CREATE TABLE `t1` (
`stddev(0)` double(8,4) default NULL
`stddev(0)` double(8,4) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
drop table t1;
create table bug22555 (i smallint primary key auto_increment, s1 smallint, s2 smallint, e decimal(30,10), o double);
insert into bug22555 (s1, s2, e, o) values (53, 78, 11.4276528, 6.828112), (17, 78, 5.916793, 1.8502951), (18, 76, 2.679231, 9.17975591), (31, 62, 6.07831, 0.1), (19, 41, 5.37463, 15.1), (83, 73, 14.567426, 7.959222), (92, 53, 6.10151, 13.1856852), (7, 12, 13.92272, 3.442007), (92, 35, 11.95358909, 6.01376678), (38, 84, 2.572, 7.904571);
select std(s1/s2) from bug22555 group by i;
std(s1/s2)
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
select std(e) from bug22555 group by i;
std(e)
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
0.00000000000000
select std(o) from bug22555 group by i;
std(o)
0
0
0
0
0
0
0
0
0
0
drop table bug22555;
create table bug22555 (i smallint, s1 smallint, s2 smallint, o1 double, o2 double, e1 decimal, e2 decimal);
insert into bug22555 values (1,53,78,53,78,53,78),(2,17,78,17,78,17,78),(3,18,76,18,76,18,76);
select i, count(*) from bug22555 group by i;
i count(*)
1 1
2 1
3 1
select std(s1/s2) from bug22555 where i=1;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 where i=2;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 where i=3;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 where i=1 group by i;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 where i=2 group by i;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 where i=3 group by i;
std(s1/s2)
0.00000000
select std(s1/s2) from bug22555 group by i order by i;
std(s1/s2)
0.00000000
0.00000000
0.00000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 1 0
2 1 0
3 1 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 1 0.00000000
2 1 0.00000000
3 1 0.00000000
set @saved_div_precision_increment=@@div_precision_increment;
set div_precision_increment=19;
select i, count(*), variance(s1/s2) from bug22555 group by i order by i;
i count(*) variance(s1/s2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), variance(o1/o2) from bug22555 group by i order by i;
i count(*) variance(o1/o2)
1 1 0
2 1 0
3 1 0
select i, count(*), variance(e1/e2) from bug22555 group by i order by i;
i count(*) variance(e1/e2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), std(s1/s2) from bug22555 group by i order by i;
i count(*) std(s1/s2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 1 0
2 1 0
3 1 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
set div_precision_increment=20;
select i, count(*), variance(s1/s2) from bug22555 group by i order by i;
i count(*) variance(s1/s2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), variance(o1/o2) from bug22555 group by i order by i;
i count(*) variance(o1/o2)
1 1 0
2 1 0
3 1 0
select i, count(*), variance(e1/e2) from bug22555 group by i order by i;
i count(*) variance(e1/e2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), std(s1/s2) from bug22555 group by i order by i;
i count(*) std(s1/s2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 1 0
2 1 0
3 1 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 1 0.000000000000000000000000000000
2 1 0.000000000000000000000000000000
3 1 0.000000000000000000000000000000
set @@div_precision_increment=@saved_div_precision_increment;
insert into bug22555 values (1,53,78,53,78,53,78),(2,17,78,17,78,17,78),(3,18,76,18,76,18,76);
insert into bug22555 values (1,53,78,53,78,53,78),(2,17,78,17,78,17,78),(3,18,76,18,76,18,76);
insert into bug22555 values (1,53,78,53,78,53,78),(2,17,78,17,78,17,78),(3,18,76,18,76,18,76);
select i, count(*), std(s1/s2) from bug22555 group by i order by i;
i count(*) std(s1/s2)
1 4 0.00000000
2 4 0.00000000
3 4 0.00000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 4 0
2 4 0
3 4 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 4 0.00000000
2 4 0.00000000
3 4 0.00000000
select std(s1/s2) from bug22555;
std(s1/s2)
0.21325764
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
select std(e1/e2) from bug22555;
std(e1/e2)
0.21325764
set @saved_div_precision_increment=@@div_precision_increment;
set div_precision_increment=19;
select i, count(*), std(s1/s2) from bug22555 group by i order by i;
i count(*) std(s1/s2)
1 4 0.000000000000000000000000000000
2 4 0.000000000000000000000000000000
3 4 0.000000000000000000000000000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 4 0
2 4 0
3 4 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 4 0.000000000000000000000000000000
2 4 0.000000000000000000000000000000
3 4 0.000000000000000000000000000000
select std(s1/s2) from bug22555;
std(s1/s2)
0.213257635866493405751853629226
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
select std(e1/e2) from bug22555;
std(e1/e2)
0.213257635866493405751853629226
set div_precision_increment=20;
select i, count(*), std(s1/s2) from bug22555 group by i order by i;
i count(*) std(s1/s2)
1 4 0.000000000000000000000000000000
2 4 0.000000000000000000000000000000
3 4 0.000000000000000000000000000000
select i, count(*), std(o1/o2) from bug22555 group by i order by i;
i count(*) std(o1/o2)
1 4 0
2 4 0
3 4 0
select i, count(*), std(e1/e2) from bug22555 group by i order by i;
i count(*) std(e1/e2)
1 4 0.000000000000000000000000000000
2 4 0.000000000000000000000000000000
3 4 0.000000000000000000000000000000
select std(s1/s2) from bug22555;
std(s1/s2)
0.213257635866493405751853629226
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
select std(e1/e2) from bug22555;
std(e1/e2)
0.213257635866493405751853629226
set @@div_precision_increment=@saved_div_precision_increment;
drop table bug22555;
create table bug22555 (s smallint, o double, e decimal);
insert into bug22555 values (1,1,1),(2,2,2),(3,3,3),(6,6,6),(7,7,7);
select var_samp(s), var_pop(s) from bug22555;
var_samp(s) var_pop(s)
6.7000 5.3600
select var_samp(o), var_pop(o) from bug22555;
var_samp(o) var_pop(o)
6.7 5.36
select var_samp(e), var_pop(e) from bug22555;
var_samp(e) var_pop(e)
6.7000 5.3600
drop table bug22555;
create table bug22555 (s smallint, o double, e decimal);
insert into bug22555 values (null,null,null),(null,null,null);
select var_samp(s) as 'null', var_pop(s) as 'null' from bug22555;
null null
NULL NULL
select var_samp(o) as 'null', var_pop(o) as 'null' from bug22555;
null null
NULL NULL
select var_samp(e) as 'null', var_pop(e) as 'null' from bug22555;
null null
NULL NULL
insert into bug22555 values (1,1,1);
select var_samp(s) as 'null', var_pop(s) as '0' from bug22555;
null 0
NULL 0.0000
select var_samp(o) as 'null', var_pop(o) as '0' from bug22555;
null 0
NULL 0
select var_samp(e) as 'null', var_pop(e) as '0' from bug22555;
null 0
NULL 0.0000
insert into bug22555 values (2,2,2);
select var_samp(s) as '0.5', var_pop(s) as '0.25' from bug22555;
0.5 0.25
0.5000 0.2500
select var_samp(o) as '0.5', var_pop(o) as '0.25' from bug22555;
0.5 0.25
0.5 0.25
select var_samp(e) as '0.5', var_pop(e) as '0.25' from bug22555;
0.5 0.25
0.5000 0.2500
drop table bug22555;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8);
INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8);
INSERT INTO t1 SELECT a, b+8 FROM t1;
INSERT INTO t1 SELECT a, b+8 FROM t1;
...
...
mysql-test/t/func_group.test
View file @
f0f9a24e
...
@@ -702,6 +702,97 @@ create table t1 select stddev(0);
...
@@ -702,6 +702,97 @@ create table t1 select stddev(0);
show
create
table
t1
;
show
create
table
t1
;
drop
table
t1
;
drop
table
t1
;
#
# Bug#22555: STDDEV yields positive result for groups with only one row
#
create
table
bug22555
(
i
smallint
primary
key
auto_increment
,
s1
smallint
,
s2
smallint
,
e
decimal
(
30
,
10
),
o
double
);
insert
into
bug22555
(
s1
,
s2
,
e
,
o
)
values
(
53
,
78
,
11.4276528
,
6.828112
),
(
17
,
78
,
5.916793
,
1.8502951
),
(
18
,
76
,
2.679231
,
9.17975591
),
(
31
,
62
,
6.07831
,
0.1
),
(
19
,
41
,
5.37463
,
15.1
),
(
83
,
73
,
14.567426
,
7.959222
),
(
92
,
53
,
6.10151
,
13.1856852
),
(
7
,
12
,
13.92272
,
3.442007
),
(
92
,
35
,
11.95358909
,
6.01376678
),
(
38
,
84
,
2.572
,
7.904571
);
select
std
(
s1
/
s2
)
from
bug22555
group
by
i
;
select
std
(
e
)
from
bug22555
group
by
i
;
select
std
(
o
)
from
bug22555
group
by
i
;
drop
table
bug22555
;
create
table
bug22555
(
i
smallint
,
s1
smallint
,
s2
smallint
,
o1
double
,
o2
double
,
e1
decimal
,
e2
decimal
);
insert
into
bug22555
values
(
1
,
53
,
78
,
53
,
78
,
53
,
78
),(
2
,
17
,
78
,
17
,
78
,
17
,
78
),(
3
,
18
,
76
,
18
,
76
,
18
,
76
);
select
i
,
count
(
*
)
from
bug22555
group
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
1
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
2
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
3
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
1
group
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
2
group
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
where
i
=
3
group
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
set
@
saved_div_precision_increment
=@@
div_precision_increment
;
set
div_precision_increment
=
19
;
select
i
,
count
(
*
),
variance
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
variance
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
variance
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
set
div_precision_increment
=
20
;
select
i
,
count
(
*
),
variance
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
variance
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
variance
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
set
@@
div_precision_increment
=@
saved_div_precision_increment
;
insert
into
bug22555
values
(
1
,
53
,
78
,
53
,
78
,
53
,
78
),(
2
,
17
,
78
,
17
,
78
,
17
,
78
),(
3
,
18
,
76
,
18
,
76
,
18
,
76
);
insert
into
bug22555
values
(
1
,
53
,
78
,
53
,
78
,
53
,
78
),(
2
,
17
,
78
,
17
,
78
,
17
,
78
),(
3
,
18
,
76
,
18
,
76
,
18
,
76
);
insert
into
bug22555
values
(
1
,
53
,
78
,
53
,
78
,
53
,
78
),(
2
,
17
,
78
,
17
,
78
,
17
,
78
),(
3
,
18
,
76
,
18
,
76
,
18
,
76
);
select
i
,
count
(
*
),
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
;
select
std
(
o1
/
o2
)
from
bug22555
;
select
std
(
e1
/
e2
)
from
bug22555
;
set
@
saved_div_precision_increment
=@@
div_precision_increment
;
set
div_precision_increment
=
19
;
select
i
,
count
(
*
),
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
;
select
std
(
o1
/
o2
)
from
bug22555
;
select
std
(
e1
/
e2
)
from
bug22555
;
set
div_precision_increment
=
20
;
select
i
,
count
(
*
),
std
(
s1
/
s2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
o1
/
o2
)
from
bug22555
group
by
i
order
by
i
;
select
i
,
count
(
*
),
std
(
e1
/
e2
)
from
bug22555
group
by
i
order
by
i
;
select
std
(
s1
/
s2
)
from
bug22555
;
select
std
(
o1
/
o2
)
from
bug22555
;
select
std
(
e1
/
e2
)
from
bug22555
;
set
@@
div_precision_increment
=@
saved_div_precision_increment
;
drop
table
bug22555
;
create
table
bug22555
(
s
smallint
,
o
double
,
e
decimal
);
insert
into
bug22555
values
(
1
,
1
,
1
),(
2
,
2
,
2
),(
3
,
3
,
3
),(
6
,
6
,
6
),(
7
,
7
,
7
);
select
var_samp
(
s
),
var_pop
(
s
)
from
bug22555
;
select
var_samp
(
o
),
var_pop
(
o
)
from
bug22555
;
select
var_samp
(
e
),
var_pop
(
e
)
from
bug22555
;
drop
table
bug22555
;
create
table
bug22555
(
s
smallint
,
o
double
,
e
decimal
);
insert
into
bug22555
values
(
null
,
null
,
null
),(
null
,
null
,
null
);
select
var_samp
(
s
)
as
'null'
,
var_pop
(
s
)
as
'null'
from
bug22555
;
select
var_samp
(
o
)
as
'null'
,
var_pop
(
o
)
as
'null'
from
bug22555
;
select
var_samp
(
e
)
as
'null'
,
var_pop
(
e
)
as
'null'
from
bug22555
;
insert
into
bug22555
values
(
1
,
1
,
1
);
select
var_samp
(
s
)
as
'null'
,
var_pop
(
s
)
as
'0'
from
bug22555
;
select
var_samp
(
o
)
as
'null'
,
var_pop
(
o
)
as
'0'
from
bug22555
;
select
var_samp
(
e
)
as
'null'
,
var_pop
(
e
)
as
'0'
from
bug22555
;
insert
into
bug22555
values
(
2
,
2
,
2
);
select
var_samp
(
s
)
as
'0.5'
,
var_pop
(
s
)
as
'0.25'
from
bug22555
;
select
var_samp
(
o
)
as
'0.5'
,
var_pop
(
o
)
as
'0.25'
from
bug22555
;
select
var_samp
(
e
)
as
'0.5'
,
var_pop
(
e
)
as
'0.25'
from
bug22555
;
drop
table
bug22555
;
#
#
# Bug #23184: SELECT causes server crash
# Bug #23184: SELECT causes server crash
#
#
...
@@ -726,4 +817,5 @@ SELECT a,AVG(DISTINCT b) AS average FROM t1 GROUP BY a HAVING average > 50;
...
@@ -726,4 +817,5 @@ SELECT a,AVG(DISTINCT b) AS average FROM t1 GROUP BY a HAVING average > 50;
DROP
TABLE
t1
;
DROP
TABLE
t1
;
###
--
echo
End
of
5.0
tests
--
echo
End
of
5.0
tests
sql/item_sum.cc
View file @
f0f9a24e
This diff is collapsed.
Click to expand it.
sql/item_sum.h
View file @
f0f9a24e
...
@@ -683,8 +683,10 @@ public:
...
@@ -683,8 +683,10 @@ public:
double
val_real
();
double
val_real
();
longlong
val_int
()
longlong
val_int
()
{
/* can't be fix_fields()ed */
return
(
longlong
)
rint
(
val_real
());
}
{
/* can't be fix_fields()ed */
return
(
longlong
)
rint
(
val_real
());
}
String
*
val_str
(
String
*
);
String
*
val_str
(
String
*
str
)
my_decimal
*
val_decimal
(
my_decimal
*
);
{
return
val_string_from_real
(
str
);
}
my_decimal
*
val_decimal
(
my_decimal
*
dec_buf
)
{
return
val_decimal_from_real
(
dec_buf
);
}
bool
is_null
()
{
update_null_value
();
return
null_value
;
}
bool
is_null
()
{
update_null_value
();
return
null_value
;
}
enum_field_types
field_type
()
const
enum_field_types
field_type
()
const
{
{
...
@@ -706,6 +708,14 @@ public:
...
@@ -706,6 +708,14 @@ public:
= (sum(ai^2) - 2*sum(a)*sum(a)/count(a) + count(a)*sum(a)^2/count(a)^2 )/count(a) =
= (sum(ai^2) - 2*sum(a)*sum(a)/count(a) + count(a)*sum(a)^2/count(a)^2 )/count(a) =
= (sum(ai^2) - 2*sum(a)^2/count(a) + sum(a)^2/count(a) )/count(a) =
= (sum(ai^2) - 2*sum(a)^2/count(a) + sum(a)^2/count(a) )/count(a) =
= (sum(ai^2) - sum(a)^2/count(a))/count(a)
= (sum(ai^2) - sum(a)^2/count(a))/count(a)
But, this falls prey to catastrophic cancellation. Instead, use the recurrence formulas
M_{1} = x_{1}, ~ M_{k} = M_{k-1} + (x_{k} - M_{k-1}) / k newline
S_{1} = 0, ~ S_{k} = S_{k-1} + (x_{k} - M_{k-1}) times (x_{k} - M_{k}) newline
for 2 <= k <= n newline
ital variance = S_{n} / (n-1)
*/
*/
class
Item_sum_variance
:
public
Item_sum_num
class
Item_sum_variance
:
public
Item_sum_num
...
@@ -714,9 +724,8 @@ class Item_sum_variance : public Item_sum_num
...
@@ -714,9 +724,8 @@ class Item_sum_variance : public Item_sum_num
public:
public:
Item_result
hybrid_type
;
Item_result
hybrid_type
;
double
sum
,
sum_sqr
;
my_decimal
dec_sum
[
2
],
dec_sqr
[
2
];
int
cur_dec
;
int
cur_dec
;
double
recurrence_m
,
recurrence_s
;
/* Used in recurrence relation. */
ulonglong
count
;
ulonglong
count
;
uint
f_precision0
,
f_scale0
;
uint
f_precision0
,
f_scale0
;
uint
f_precision1
,
f_scale1
;
uint
f_precision1
,
f_scale1
;
...
@@ -725,7 +734,7 @@ public:
...
@@ -725,7 +734,7 @@ public:
uint
prec_increment
;
uint
prec_increment
;
Item_sum_variance
(
Item
*
item_par
,
uint
sample_arg
)
:
Item_sum_num
(
item_par
),
Item_sum_variance
(
Item
*
item_par
,
uint
sample_arg
)
:
Item_sum_num
(
item_par
),
hybrid_type
(
REAL_RESULT
),
c
ur_dec
(
0
),
c
ount
(
0
),
sample
(
sample_arg
)
hybrid_type
(
REAL_RESULT
),
count
(
0
),
sample
(
sample_arg
)
{}
{}
Item_sum_variance
(
THD
*
thd
,
Item_sum_variance
*
item
);
Item_sum_variance
(
THD
*
thd
,
Item_sum_variance
*
item
);
enum
Sumfunctype
sum_func
()
const
{
return
VARIANCE_FUNC
;
}
enum
Sumfunctype
sum_func
()
const
{
return
VARIANCE_FUNC
;
}
...
@@ -745,7 +754,6 @@ public:
...
@@ -745,7 +754,6 @@ public:
enum
Item_result
result_type
()
const
{
return
REAL_RESULT
;
}
enum
Item_result
result_type
()
const
{
return
REAL_RESULT
;
}
void
cleanup
()
void
cleanup
()
{
{
cur_dec
=
0
;
count
=
0
;
count
=
0
;
Item_sum_num
::
cleanup
();
Item_sum_num
::
cleanup
();
}
}
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment