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Kirill Smelkov
mariadb
Commits
5485e447
Commit
5485e447
authored
Oct 01, 2009
by
Alexander Nozdrin
Browse files
Options
Browse Files
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Plain Diff
Merge from mysql-next-mr.
parents
de0285a2
3f7624fc
Changes
14
Expand all
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Showing
14 changed files
with
1660 additions
and
922 deletions
+1660
-922
mysql-test/mysql-test-run.pl
mysql-test/mysql-test-run.pl
+0
-1
mysql-test/r/bench_count_distinct.result
mysql-test/r/bench_count_distinct.result
+1
-1
mysql-test/r/group_min_max.result
mysql-test/r/group_min_max.result
+262
-8
mysql-test/t/group_min_max.test
mysql-test/t/group_min_max.test
+123
-2
sql/field.h
sql/field.h
+6
-3
sql/item_sum.cc
sql/item_sum.cc
+637
-646
sql/item_sum.h
sql/item_sum.h
+335
-198
sql/opt_range.cc
sql/opt_range.cc
+137
-51
sql/opt_range.h
sql/opt_range.h
+15
-2
sql/opt_sum.cc
sql/opt_sum.cc
+8
-2
sql/sql_class.h
sql/sql_class.h
+1
-0
sql/sql_select.cc
sql/sql_select.cc
+125
-5
sql/sql_select.h
sql/sql_select.h
+7
-0
sql/sql_yacc.yy
sql/sql_yacc.yy
+3
-3
No files found.
mysql-test/mysql-test-run.pl
View file @
5485e447
...
...
@@ -5085,7 +5085,6 @@ sub valgrind_arguments {
else
{
mtr_add_arg
(
$args
,
"
--tool=memcheck
");
# From >= 2.1.2 needs this option
mtr_add_arg
(
$args
,
"
--alignment=8
");
mtr_add_arg
(
$args
,
"
--leak-check=yes
");
mtr_add_arg
(
$args
,
"
--num-callers=16
");
mtr_add_arg
(
$args
,
"
--suppressions=%s/valgrind.supp
",
$glob_mysql_test_dir
)
...
...
mysql-test/r/bench_count_distinct.result
View file @
5485e447
...
...
@@ -5,7 +5,7 @@ count(distinct n)
100
explain extended select count(distinct n) from t1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1
index NULL n 4 NULL 200 100.00 Using index
1 SIMPLE t1
range NULL n 4 NULL 10 100.00 Using index for group-by
Warnings:
Note 1003 select count(distinct `test`.`t1`.`n`) AS `count(distinct n)` from `test`.`t1`
drop table t1;
mysql-test/r/group_min_max.result
View file @
5485e447
This diff is collapsed.
Click to expand it.
mysql-test/t/group_min_max.test
View file @
5485e447
...
...
@@ -570,13 +570,13 @@ explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
explain
select
count
(
distinct
a1
,
a2
,
b
,
c
)
from
t1
where
(
a2
>=
'b'
)
and
(
b
=
'a'
)
and
(
c
=
'i121'
);
explain
extended
select
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
)
and
(
b
=
'c'
);
explain
select
count
(
distinct
b
)
from
t1
where
(
a2
>=
'b'
)
and
(
b
=
'a'
);
explain
extended
select
ord
(
a1
)
+
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
);
explain
extended
select
98
+
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
);
select
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a2
>=
'b'
)
and
(
b
=
'a'
);
select
count
(
distinct
a1
,
a2
,
b
,
c
)
from
t1
where
(
a2
>=
'b'
)
and
(
b
=
'a'
)
and
(
c
=
'i121'
);
select
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
)
and
(
b
=
'c'
);
select
count
(
distinct
b
)
from
t1
where
(
a2
>=
'b'
)
and
(
b
=
'a'
);
select
ord
(
a1
)
+
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
);
select
98
+
count
(
distinct
a1
,
a2
,
b
)
from
t1
where
(
a1
>
'a'
)
and
(
a2
>
'a'
);
#
# Queries with expressions in the select clause
...
...
@@ -1033,3 +1033,124 @@ SELECT a, MAX(b) FROM t WHERE b GROUP BY a;
DROP
TABLE
t
;
--
echo
End
of
5.1
tests
--
echo
#
--
echo
# WL#3220 (Loose index scan for COUNT DISTINCT)
--
echo
#
CREATE
TABLE
t1
(
a
INT
,
b
INT
,
c
INT
,
KEY
(
a
,
b
));
INSERT
INTO
t1
VALUES
(
1
,
1
,
1
),
(
1
,
2
,
1
),
(
1
,
3
,
1
),
(
1
,
4
,
1
);
INSERT
INTO
t1
SELECT
a
,
b
+
4
,
1
FROM
t1
;
INSERT
INTO
t1
SELECT
a
+
1
,
b
,
1
FROM
t1
;
CREATE
TABLE
t2
(
a
INT
,
b
INT
,
c
INT
,
d
INT
,
e
INT
,
f
INT
,
KEY
(
a
,
b
,
c
));
INSERT
INTO
t2
VALUES
(
1
,
1
,
1
,
1
,
1
,
1
),
(
1
,
2
,
1
,
1
,
1
,
1
),
(
1
,
3
,
1
,
1
,
1
,
1
),
(
1
,
4
,
1
,
1
,
1
,
1
);
INSERT
INTO
t2
SELECT
a
,
b
+
4
,
c
,
d
,
e
,
f
FROM
t2
;
INSERT
INTO
t2
SELECT
a
+
1
,
b
,
c
,
d
,
e
,
f
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
;
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
)
FROM
t1
;
SELECT
COUNT
(
DISTINCT
a
,
b
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
b
,
a
)
FROM
t1
;
SELECT
COUNT
(
DISTINCT
b
,
a
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
b
)
FROM
t1
;
SELECT
COUNT
(
DISTINCT
b
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
GROUP
BY
a
;
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
GROUP
BY
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
b
)
FROM
t1
GROUP
BY
a
;
SELECT
COUNT
(
DISTINCT
b
)
FROM
t1
GROUP
BY
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
GROUP
BY
b
;
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
GROUP
BY
b
;
EXPLAIN
SELECT
DISTINCT
COUNT
(
DISTINCT
a
)
FROM
t1
;
SELECT
DISTINCT
COUNT
(
DISTINCT
a
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
+
0
)
FROM
t1
;
SELECT
COUNT
(
DISTINCT
a
,
b
+
0
)
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
HAVING
COUNT
(
DISTINCT
b
)
<
10
;
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
HAVING
COUNT
(
DISTINCT
b
)
<
10
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
HAVING
COUNT
(
DISTINCT
c
)
<
10
;
SELECT
COUNT
(
DISTINCT
a
)
FROM
t1
HAVING
COUNT
(
DISTINCT
c
)
<
10
;
EXPLAIN
SELECT
1
FROM
t1
HAVING
COUNT
(
DISTINCT
a
)
<
10
;
SELECT
1
FROM
t1
HAVING
COUNT
(
DISTINCT
a
)
<
10
;
EXPLAIN
SELECT
1
FROM
t1
GROUP
BY
a
HAVING
COUNT
(
DISTINCT
b
)
>
1
;
SELECT
1
FROM
t1
GROUP
BY
a
HAVING
COUNT
(
DISTINCT
b
)
>
1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
t1_1
.
a
)
FROM
t1
t1_1
,
t1
t1_2
GROUP
BY
t1_1
.
a
;
SELECT
COUNT
(
DISTINCT
t1_1
.
a
)
FROM
t1
t1_1
,
t1
t1_2
GROUP
BY
t1_1
.
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
),
12
FROM
t1
;
SELECT
COUNT
(
DISTINCT
a
),
12
FROM
t1
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
,
c
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
,
b
,
c
)
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
),
AVG
(
DISTINCT
a
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
),
AVG
(
DISTINCT
a
)
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
),
AVG
(
DISTINCT
f
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
),
AVG
(
DISTINCT
f
)
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
a
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
a
)
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
f
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
f
)
FROM
t2
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
d
)
FROM
t2
;
SELECT
COUNT
(
DISTINCT
a
,
b
),
COUNT
(
DISTINCT
b
,
d
)
FROM
t2
;
EXPLAIN
SELECT
a
,
c
,
COUNT
(
DISTINCT
c
,
a
,
b
)
FROM
t2
GROUP
BY
a
,
b
,
c
;
SELECT
a
,
c
,
COUNT
(
DISTINCT
c
,
a
,
b
)
FROM
t2
GROUP
BY
a
,
b
,
c
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
c
,
a
,
b
)
FROM
t2
WHERE
a
>
5
AND
b
BETWEEN
10
AND
20
GROUP
BY
a
,
b
,
c
;
SELECT
COUNT
(
DISTINCT
c
,
a
,
b
)
FROM
t2
WHERE
a
>
5
AND
b
BETWEEN
10
AND
20
GROUP
BY
a
,
b
,
c
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
WHERE
a
=
5
GROUP
BY
b
;
SELECT
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
WHERE
a
=
5
GROUP
BY
b
;
EXPLAIN
SELECT
a
,
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
GROUP
BY
a
;
SELECT
a
,
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
GROUP
BY
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
GROUP
BY
a
;
SELECT
COUNT
(
DISTINCT
b
),
SUM
(
DISTINCT
b
)
FROM
t2
GROUP
BY
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
)
FROM
t2
WHERE
c
=
13
AND
d
=
42
;
SELECT
COUNT
(
DISTINCT
a
,
b
)
FROM
t2
WHERE
c
=
13
AND
d
=
42
;
EXPLAIN
SELECT
a
,
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
)
FROM
t2
WHERE
b
=
13
AND
c
=
42
GROUP
BY
a
;
SELECT
a
,
COUNT
(
DISTINCT
a
),
SUM
(
DISTINCT
a
)
FROM
t2
WHERE
b
=
13
AND
c
=
42
GROUP
BY
a
;
EXPLAIN
SELECT
COUNT
(
DISTINCT
a
,
b
),
SUM
(
DISTINCT
a
)
FROM
t2
WHERE
b
=
42
;
SELECT
COUNT
(
DISTINCT
a
,
b
),
SUM
(
DISTINCT
a
)
FROM
t2
WHERE
b
=
42
;
EXPLAIN
SELECT
SUM
(
DISTINCT
a
),
MAX
(
b
)
FROM
t2
GROUP
BY
a
;
SELECT
SUM
(
DISTINCT
a
),
MAX
(
b
)
FROM
t2
GROUP
BY
a
;
EXPLAIN
SELECT
42
*
(
a
+
c
+
COUNT
(
DISTINCT
c
,
a
,
b
))
FROM
t2
GROUP
BY
a
,
b
,
c
;
SELECT
42
*
(
a
+
c
+
COUNT
(
DISTINCT
c
,
a
,
b
))
FROM
t2
GROUP
BY
a
,
b
,
c
;
EXPLAIN
SELECT
(
SUM
(
DISTINCT
a
)
+
MAX
(
b
))
FROM
t2
GROUP
BY
a
;
SELECT
(
SUM
(
DISTINCT
a
)
+
MAX
(
b
))
FROM
t2
GROUP
BY
a
;
DROP
TABLE
t1
,
t2
;
--
echo
# end of WL#3220 tests
sql/field.h
View file @
5485e447
...
...
@@ -1934,9 +1934,12 @@ public:
virtual
bool
str_needs_quotes
()
{
return
TRUE
;
}
my_decimal
*
val_decimal
(
my_decimal
*
);
int
cmp
(
const
uchar
*
a
,
const
uchar
*
b
)
{
DBUG_ASSERT
(
ptr
==
a
);
return
Field_bit
::
key_cmp
(
b
,
bytes_in_rec
+
test
(
bit_len
));
{
DBUG_ASSERT
(
ptr
==
a
||
ptr
==
b
);
if
(
ptr
==
a
)
return
Field_bit
::
key_cmp
(
b
,
bytes_in_rec
+
test
(
bit_len
));
else
return
Field_bit
::
key_cmp
(
a
,
bytes_in_rec
+
test
(
bit_len
))
*
-
1
;
}
int
cmp_binary_offset
(
uint
row_offset
)
{
return
cmp_offset
(
row_offset
);
}
...
...
sql/item_sum.cc
View file @
5485e447
This diff is collapsed.
Click to expand it.
sql/item_sum.h
View file @
5485e447
This diff is collapsed.
Click to expand it.
sql/opt_range.cc
View file @
5485e447
This diff is collapsed.
Click to expand it.
sql/opt_range.h
View file @
5485e447
...
...
@@ -616,6 +616,7 @@ private:
uchar
*
last_prefix
;
/* Prefix of the last group for detecting EOF. */
bool
have_min
;
/* Specify whether we are computing */
bool
have_max
;
/* a MIN, a MAX, or both. */
bool
have_agg_distinct
;
/* aggregate_function(DISTINCT ...). */
bool
seen_first_key
;
/* Denotes whether the first key was retrieved.*/
KEY_PART_INFO
*
min_max_arg_part
;
/* The keypart of the only argument field */
/* of all MIN/MAX functions. */
...
...
@@ -629,6 +630,11 @@ private:
List
<
Item_sum
>
*
max_functions
;
List_iterator
<
Item_sum
>
*
min_functions_it
;
List_iterator
<
Item_sum
>
*
max_functions_it
;
/*
Use index scan to get the next different key instead of jumping into it
through index read
*/
bool
is_index_scan
;
public:
/*
The following two members are public to allow easy access from
...
...
@@ -646,12 +652,13 @@ private:
void
update_max_result
();
public:
QUICK_GROUP_MIN_MAX_SELECT
(
TABLE
*
table
,
JOIN
*
join
,
bool
have_min
,
bool
have_max
,
KEY_PART_INFO
*
min_max_arg_part
,
bool
have_max
,
bool
have_agg_distinct
,
KEY_PART_INFO
*
min_max_arg_part
,
uint
group_prefix_len
,
uint
group_key_parts
,
uint
used_key_parts
,
KEY
*
index_info
,
uint
use_index
,
double
read_cost
,
ha_rows
records
,
uint
key_infix_len
,
uchar
*
key_infix
,
MEM_ROOT
*
parent_alloc
);
*
parent_alloc
,
bool
is_index_scan
);
~
QUICK_GROUP_MIN_MAX_SELECT
();
bool
add_range
(
SEL_ARG
*
sel_range
);
void
update_key_stat
();
...
...
@@ -667,6 +674,12 @@ public:
#ifndef DBUG_OFF
void
dbug_dump
(
int
indent
,
bool
verbose
);
#endif
bool
is_agg_distinct
()
{
return
have_agg_distinct
;
}
virtual
void
append_loose_scan_type
(
String
*
str
)
{
if
(
is_index_scan
)
str
->
append
(
STRING_WITH_LEN
(
" (scanning)"
));
}
};
...
...
sql/opt_sum.cc
View file @
5485e447
...
...
@@ -355,10 +355,13 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
const_result
=
0
;
break
;
}
item_sum
->
set_aggregator
(
item_sum
->
with_distinct
?
Aggregator
::
DISTINCT_AGGREGATOR
:
Aggregator
::
SIMPLE_AGGREGATOR
);
if
(
!
count
)
{
/* If count == 0, then we know that is_exact_count == TRUE. */
((
Item_sum_min
*
)
item_sum
)
->
clear
();
/* Set to NULL. */
((
Item_sum_min
*
)
item_sum
)
->
aggregator_
clear
();
/* Set to NULL. */
}
else
((
Item_sum_min
*
)
item_sum
)
->
reset
();
/* Set to the constant value. */
...
...
@@ -443,10 +446,13 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
const_result
=
0
;
break
;
}
item_sum
->
set_aggregator
(
item_sum
->
with_distinct
?
Aggregator
::
DISTINCT_AGGREGATOR
:
Aggregator
::
SIMPLE_AGGREGATOR
);
if
(
!
count
)
{
/* If count != 1, then we know that is_exact_count == TRUE. */
((
Item_sum_max
*
)
item_sum
)
->
clear
();
/* Set to NULL. */
((
Item_sum_max
*
)
item_sum
)
->
aggregator_
clear
();
/* Set to NULL. */
}
else
((
Item_sum_max
*
)
item_sum
)
->
reset
();
/* Set to the constant value. */
...
...
sql/sql_class.h
View file @
5485e447
...
...
@@ -54,6 +54,7 @@
class
Reprepare_observer
{
public:
Reprepare_observer
()
{}
/**
Check if a change of metadata is OK. In future
the signature of this method may be extended to accept the old
...
...
sql/sql_select.cc
View file @
5485e447
...
...
@@ -222,6 +222,7 @@ static void update_tmptable_sum_func(Item_sum **func,TABLE *tmp_table);
static
void
copy_sum_funcs
(
Item_sum
**
func_ptr
,
Item_sum
**
end
);
static
bool
add_ref_to_table_cond
(
THD
*
thd
,
JOIN_TAB
*
join_tab
);
static
bool
setup_sum_funcs
(
THD
*
thd
,
Item_sum
**
func_ptr
);
static
bool
prepare_sum_aggregators
(
Item_sum
**
func_ptr
,
bool
need_distinct
);
static
bool
init_sum_functions
(
Item_sum
**
func
,
Item_sum
**
end
);
static
bool
update_sum_func
(
Item_sum
**
func
);
static
void
select_describe
(
JOIN
*
join
,
bool
need_tmp_table
,
bool
need_order
,
...
...
@@ -1232,7 +1233,11 @@ JOIN::optimize()
if
(
test_if_subpart
(
group_list
,
order
)
||
(
!
group_list
&&
tmp_table_param
.
sum_func_count
))
{
order
=
0
;
if
(
is_indexed_agg_distinct
(
this
,
NULL
))
sort_and_group
=
0
;
}
// Can't use sort on head table if using row cache
if
(
full_join
)
...
...
@@ -1410,8 +1415,16 @@ JOIN::optimize()
single table queries, thus it is sufficient to test only the first
join_tab element of the plan for its access method.
*/
bool
need_distinct
=
TRUE
;
if
(
join_tab
->
is_using_loose_index_scan
())
{
tmp_table_param
.
precomputed_group_by
=
TRUE
;
if
(
join_tab
->
is_using_agg_loose_index_scan
())
{
need_distinct
=
FALSE
;
tmp_table_param
.
precomputed_group_by
=
FALSE
;
}
}
/* Create a tmp table if distinct or if the sort is too complicated */
if
(
need_tmp
)
...
...
@@ -1472,6 +1485,7 @@ JOIN::optimize()
HA_POS_ERROR
,
HA_POS_ERROR
,
FALSE
)
||
alloc_group_fields
(
this
,
group_list
)
||
make_sum_func_list
(
all_fields
,
fields_list
,
1
)
||
prepare_sum_aggregators
(
sum_funcs
,
need_distinct
)
||
setup_sum_funcs
(
thd
,
sum_funcs
))
{
DBUG_RETURN
(
1
);
...
...
@@ -1481,6 +1495,7 @@ JOIN::optimize()
else
{
if
(
make_sum_func_list
(
all_fields
,
fields_list
,
0
)
||
prepare_sum_aggregators
(
sum_funcs
,
need_distinct
)
||
setup_sum_funcs
(
thd
,
sum_funcs
))
{
DBUG_RETURN
(
1
);
...
...
@@ -1953,7 +1968,9 @@ JOIN::exec()
}
}
if
(
curr_join
->
make_sum_func_list
(
*
curr_all_fields
,
*
curr_fields_list
,
1
,
TRUE
))
1
,
TRUE
)
||
prepare_sum_aggregators
(
curr_join
->
sum_funcs
,
!
curr_join
->
join_tab
->
is_using_agg_loose_index_scan
()))
DBUG_VOID_RETURN
;
curr_join
->
group_list
=
0
;
if
(
!
curr_join
->
sort_and_group
&&
...
...
@@ -2056,6 +2073,8 @@ JOIN::exec()
if
(
curr_join
->
make_sum_func_list
(
*
curr_all_fields
,
*
curr_fields_list
,
1
,
TRUE
)
||
prepare_sum_aggregators
(
curr_join
->
sum_funcs
,
!
curr_join
->
join_tab
||
!
curr_join
->
join_tab
->
is_using_agg_loose_index_scan
())
||
setup_sum_funcs
(
curr_join
->
thd
,
curr_join
->
sum_funcs
)
||
thd
->
is_fatal_error
)
DBUG_VOID_RETURN
;
...
...
@@ -3937,6 +3956,82 @@ static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array)
}
/**
Check for the presence of AGGFN(DISTINCT a) queries that may be subject
to loose index scan.
Check if the query is a subject to AGGFN(DISTINCT) using loose index scan
(QUICK_GROUP_MIN_MAX_SELECT).
Optionally (if out_args is supplied) will push the arguments of
AGGFN(DISTINCT) to the list
@param join the join to check
@param[out] out_args list of aggregate function arguments
@return does the query qualify for indexed AGGFN(DISTINCT)
@retval true it does
@retval false AGGFN(DISTINCT) must apply distinct in it.
*/
bool
is_indexed_agg_distinct
(
JOIN
*
join
,
List
<
Item_field
>
*
out_args
)
{
Item_sum
**
sum_item_ptr
;
bool
result
=
false
;
if
(
join
->
tables
!=
1
||
/* reference more than 1 table */
join
->
select_distinct
||
/* or a DISTINCT */
join
->
select_lex
->
olap
==
ROLLUP_TYPE
)
/* Check (B3) for ROLLUP */
return
false
;
if
(
join
->
make_sum_func_list
(
join
->
all_fields
,
join
->
fields_list
,
1
))
return
false
;
for
(
sum_item_ptr
=
join
->
sum_funcs
;
*
sum_item_ptr
;
sum_item_ptr
++
)
{
Item_sum
*
sum_item
=
*
sum_item_ptr
;
Item
*
expr
;
/* aggregate is not AGGFN(DISTINCT) or more than 1 argument to it */
switch
(
sum_item
->
sum_func
())
{
case
Item_sum
:
:
MIN_FUNC
:
case
Item_sum
:
:
MAX_FUNC
:
continue
;
case
Item_sum
:
:
COUNT_DISTINCT_FUNC
:
break
;
case
Item_sum
:
:
AVG_DISTINCT_FUNC
:
case
Item_sum
:
:
SUM_DISTINCT_FUNC
:
if
(
sum_item
->
get_arg_count
()
==
1
)
break
;
/* fall through */
default:
return
false
;
}
/*
We arrive here for every COUNT(DISTINCT),AVG(DISTINCT) or SUM(DISTINCT).
Collect the arguments of the aggregate functions to a list.
We don't worry about duplicates as these will be sorted out later in
get_best_group_min_max
*/
for
(
uint
i
=
0
;
i
<
sum_item
->
get_arg_count
();
i
++
)
{
expr
=
sum_item
->
get_arg
(
i
);
/* The AGGFN(DISTINCT) arg is not an attribute? */
if
(
expr
->
real_item
()
->
type
()
!=
Item
::
FIELD_ITEM
)
return
false
;
/*
If we came to this point the AGGFN(DISTINCT) loose index scan
optimization is applicable
*/
if
(
out_args
)
out_args
->
push_back
((
Item_field
*
)
expr
);
result
=
true
;
}
}
return
result
;
}
/**
Discover the indexes that can be used for GROUP BY or DISTINCT queries.
...
...
@@ -3979,6 +4074,10 @@ add_group_and_distinct_keys(JOIN *join, JOIN_TAB *join_tab)
item
->
walk
(
&
Item
::
collect_item_field_processor
,
0
,
(
uchar
*
)
&
indexed_fields
);
}
else
if
(
is_indexed_agg_distinct
(
join
,
&
indexed_fields
))
{
join
->
sort_and_group
=
1
;
}
else
return
;
...
...
@@ -10377,6 +10476,7 @@ TABLE *create_virtual_tmp_table(THD *thd, List<Create_field> &field_list)
bzero
(
share
,
sizeof
(
*
share
));
table
->
field
=
field
;
table
->
s
=
share
;
table
->
temp_pool_slot
=
MY_BIT_NONE
;
share
->
blob_field
=
blob_field
;
share
->
fields
=
field_count
;
share
->
blob_ptr_size
=
portable_sizeof_char_ptr
;
...
...
@@ -14532,7 +14632,7 @@ setup_new_fields(THD *thd, List<Item> &fields,
optimize away 'order by'.
*/
static
ORDER
*
ORDER
*
create_distinct_group
(
THD
*
thd
,
Item
**
ref_pointer_array
,
ORDER
*
order_list
,
List
<
Item
>
&
fields
,
List
<
Item
>
&
all_fields
,
...
...
@@ -15334,7 +15434,22 @@ static bool setup_sum_funcs(THD *thd, Item_sum **func_ptr)
DBUG_ENTER
(
"setup_sum_funcs"
);
while
((
func
=
*
(
func_ptr
++
)))
{
if
(
func
->
setup
(
thd
))
if
(
func
->
aggregator_setup
(
thd
))
DBUG_RETURN
(
TRUE
);
}
DBUG_RETURN
(
FALSE
);
}
static
bool
prepare_sum_aggregators
(
Item_sum
**
func_ptr
,
bool
need_distinct
)
{
Item_sum
*
func
;
DBUG_ENTER
(
"setup_sum_funcs"
);
while
((
func
=
*
(
func_ptr
++
)))
{
if
(
func
->
set_aggregator
(
need_distinct
&&
func
->
with_distinct
?
Aggregator
::
DISTINCT_AGGREGATOR
:
Aggregator
::
SIMPLE_AGGREGATOR
))
DBUG_RETURN
(
TRUE
);
}
DBUG_RETURN
(
FALSE
);
...
...
@@ -15384,7 +15499,7 @@ init_sum_functions(Item_sum **func_ptr, Item_sum **end_ptr)
/* If rollup, calculate the upper sum levels */
for
(
;
*
func_ptr
;
func_ptr
++
)
{
if
((
*
func_ptr
)
->
add
())
if
((
*
func_ptr
)
->
a
ggregator_a
dd
())
return
1
;
}
return
0
;
...
...
@@ -15396,7 +15511,7 @@ update_sum_func(Item_sum **func_ptr)
{
Item_sum
*
func
;
for
(;
(
func
=
(
Item_sum
*
)
*
func_ptr
)
;
func_ptr
++
)
if
(
func
->
add
())
if
(
func
->
a
ggregator_a
dd
())
return
1
;
return
0
;
}
...
...
@@ -16313,7 +16428,12 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
if
(
key_read
)
{
if
(
quick_type
==
QUICK_SELECT_I
::
QS_TYPE_GROUP_MIN_MAX
)
{
QUICK_GROUP_MIN_MAX_SELECT
*
qgs
=
(
QUICK_GROUP_MIN_MAX_SELECT
*
)
tab
->
select
->
quick
;
extra
.
append
(
STRING_WITH_LEN
(
"; Using index for group-by"
));
qgs
->
append_loose_scan_type
(
&
extra
);
}
else
extra
.
append
(
STRING_WITH_LEN
(
"; Using index"
));
}
...
...
sql/sql_select.h
View file @
5485e447
...
...
@@ -218,6 +218,11 @@ typedef struct st_join_table {
(
select
->
quick
->
get_type
()
==
QUICK_SELECT_I
::
QS_TYPE_GROUP_MIN_MAX
));
}
bool
is_using_agg_loose_index_scan
()
{
return
(
is_using_loose_index_scan
()
&&
((
QUICK_GROUP_MIN_MAX_SELECT
*
)
select
->
quick
)
->
is_agg_distinct
());
}
}
JOIN_TAB
;
enum_nested_loop_state
sub_select_cache
(
JOIN
*
join
,
JOIN_TAB
*
join_tab
,
bool
...
...
@@ -564,6 +569,8 @@ Field* create_tmp_field_from_field(THD *thd, Field* org_field,
const
char
*
name
,
TABLE
*
table
,
Item_field
*
item
,
uint
convert_blob_length
);
bool
is_indexed_agg_distinct
(
JOIN
*
join
,
List
<
Item_field
>
*
out_args
);
/* functions from opt_sum.cc */
bool
simple_pred
(
Item_func
*
func_item
,
Item
**
args
,
bool
*
inv_order
);
int
opt_sum_query
(
TABLE_LIST
*
tables
,
List
<
Item
>
&
all_fields
,
COND
*
conds
);
...
...
sql/sql_yacc.yy
View file @
5485e447
...
...
@@ -8182,7 +8182,7 @@ sum_expr:
}
| AVG_SYM '(' DISTINCT in_sum_expr ')'
{
$$= new (YYTHD->mem_root) Item_sum_avg
_distinct($4
);
$$= new (YYTHD->mem_root) Item_sum_avg
($4, TRUE
);
if ($$ == NULL)
MYSQL_YYABORT;
}
...
...
@@ -8225,7 +8225,7 @@ sum_expr:
{ Select->in_sum_expr--; }
')'
{
$$= new (YYTHD->mem_root) Item_sum_count
_distinct
(* $5);
$$= new (YYTHD->mem_root) Item_sum_count(* $5);
if ($$ == NULL)
MYSQL_YYABORT;
}
...
...
@@ -8290,7 +8290,7 @@ sum_expr:
}
| SUM_SYM '(' DISTINCT in_sum_expr ')'
{
$$= new (YYTHD->mem_root) Item_sum_sum
_distinct($4
);
$$= new (YYTHD->mem_root) Item_sum_sum
($4, TRUE
);
if ($$ == NULL)
MYSQL_YYABORT;
}
...
...
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