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MWL#68 Subquery optimization: Efficient NOT IN execution with NULLs 

This patch does three things:
- It adds the possibility to force the execution of top-level [NOT] IN
  subquery predicates via the IN=>EXISTS transformation. This is done by
  setting both optimizer switches partial_match_rowid_merge and
  partial_match_table_scan to "off".
- It adjusts all test cases where the complete optimizer_switch is
  selected because now we have two more switches.
- For those test cases where the plan changes because of the new available
  strategies, we switch off both partial match strategies in order to
  force the "old" IN=>EXISTS strategy. This is done because most of these
  test cases specifically test bugs in this strategy.

sql/opt_subselect.cc:
  Adds the possibility to force the execution of top-level [NOT] IN
  subquery predicates via the IN=>EXISTS transformation. This is done by
  setting both optimizer switches partial_match_rowid_merge and
  partial_match_table_scan to "off".
parent 04101a67
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Showing with 105 additions and 46 deletions
mysql-test/include/mix1.inc
View file @ be4b955f
...@@ -1177,8 +1177,11 @@ DROP TABLE t1; ...@@ -1177,8 +1177,11 @@ DROP TABLE t1;
create table t1 (a bit(1) not null,b int) engine=myisam; create table t1 (a bit(1) not null,b int) engine=myisam;
create table t2 (c int) engine=innodb; create table t2 (c int) engine=innodb;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=off';
explain explain
select b from t1 where a not in (select b from t1,t2 group by a) group by a; select b from t1 where a not in (select b from t1,t2 group by a) group by a;
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2; DROP TABLE t1,t2;
--echo End of 5.0 tests --echo End of 5.0 tests
......
mysql-test/r/index_merge_myisam.result
View file @ be4b955f
...@@ -1419,19 +1419,19 @@ drop table t1; ...@@ -1419,19 +1419,19 @@ drop table t1;
# #
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='index_merge=off,index_merge_union=off'; set optimizer_switch='index_merge=off,index_merge_union=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='index_merge_union=on'; set optimizer_switch='index_merge_union=on';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,index_merge_sort_union=off'; set optimizer_switch='default,index_merge_sort_union=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch=4; set optimizer_switch=4;
ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4' ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4'
set optimizer_switch=NULL; set optimizer_switch=NULL;
...@@ -1458,21 +1458,21 @@ set optimizer_switch=default; ...@@ -1458,21 +1458,21 @@ set optimizer_switch=default;
set optimizer_switch='index_merge=off,index_merge_union=off,default'; set optimizer_switch='index_merge=off,index_merge_union=off,default';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch=default; set optimizer_switch=default;
select @@global.optimizer_switch; select @@global.optimizer_switch;
@@global.optimizer_switch @@global.optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set @@global.optimizer_switch=default; set @@global.optimizer_switch=default;
select @@global.optimizer_switch; select @@global.optimizer_switch;
@@global.optimizer_switch @@global.optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
# #
# Check index_merge's @@optimizer_switch flags # Check index_merge's @@optimizer_switch flags
# #
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
create table t0 (a int); create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, c int, filler char(100), create table t1 (a int, b int, c int, filler char(100),
...@@ -1582,5 +1582,5 @@ id select_type table type possible_keys key key_len ref rows Extra ...@@ -1582,5 +1582,5 @@ id select_type table type possible_keys key key_len ref rows Extra
set optimizer_switch=default; set optimizer_switch=default;
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
drop table t0, t1; drop table t0, t1;
mysql-test/r/innodb_mysql.result
View file @ be4b955f
...@@ -1425,12 +1425,15 @@ DROP TABLE t1; ...@@ -1425,12 +1425,15 @@ DROP TABLE t1;
# #
create table t1 (a bit(1) not null,b int) engine=myisam; create table t1 (a bit(1) not null,b int) engine=myisam;
create table t2 (c int) engine=innodb; create table t2 (c int) engine=innodb;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch='partial_match_rowid_merge=off,partial_match_table_scan=off';
explain explain
select b from t1 where a not in (select b from t1,t2 group by a) group by a; select b from t1 where a not in (select b from t1,t2 group by a) group by a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
2 DEPENDENT SUBQUERY t1 system NULL NULL NULL NULL 0 const row not found 2 DEPENDENT SUBQUERY t1 system NULL NULL NULL NULL 0 const row not found
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 1 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 1
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2; DROP TABLE t1,t2;
End of 5.0 tests End of 5.0 tests
CREATE TABLE `t2` ( CREATE TABLE `t2` (
......
mysql-test/r/myisam_mrr.result
View file @ be4b955f
...@@ -394,7 +394,7 @@ drop table t0, t1; ...@@ -394,7 +394,7 @@ drop table t0, t1;
# - engine_condition_pushdown does not affect ICP # - engine_condition_pushdown does not affect ICP
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
create table t0 (a int); create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, key(a)); create table t1 (a int, b int, key(a));
......
mysql-test/r/ps.result
View file @ be4b955f
...@@ -149,6 +149,8 @@ c29 longblob, c30 longtext, c31 enum('one', 'two', 'three'), ...@@ -149,6 +149,8 @@ c29 longblob, c30 longtext, c31 enum('one', 'two', 'three'),
c32 set('monday', 'tuesday', 'wednesday') c32 set('monday', 'tuesday', 'wednesday')
) engine = MYISAM ; ) engine = MYISAM ;
create table t2 like t1; create table t2 like t1;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
set @stmt= ' explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25 ' ; set @stmt= ' explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25 ' ;
prepare stmt1 from @stmt ; prepare stmt1 from @stmt ;
execute stmt1 ; execute stmt1 ;
...@@ -177,6 +179,7 @@ id select_type table type possible_keys key key_len ref rows Extra ...@@ -177,6 +179,7 @@ id select_type table type possible_keys key key_len ref rows Extra
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
deallocate prepare stmt1; deallocate prepare stmt1;
drop tables t1,t2; drop tables t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
set @arg00=1; set @arg00=1;
prepare stmt1 from ' create table t1 (m int) as select 1 as m ' ; prepare stmt1 from ' create table t1 (m int) as select 1 as m ' ;
execute stmt1 ; execute stmt1 ;
......
mysql-test/r/subselect.result
View file @ be4b955f
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
select (select 2); select (select 2);
(select 2) (select 2)
2 2
...@@ -4803,4 +4805,5 @@ SELECT 1 FROM t1 GROUP BY ...@@ -4803,4 +4805,5 @@ SELECT 1 FROM t1 GROUP BY
1 1
1 1
DROP TABLE t1; DROP TABLE t1;
set @@optimizer_switch=@save_optimizer_switch;
End of 5.1 tests. End of 5.1 tests.
mysql-test/r/subselect3.result
View file @ be4b955f
...@@ -63,12 +63,15 @@ Handler_read_rnd_next 11 ...@@ -63,12 +63,15 @@ Handler_read_rnd_next 11
select ' ^ This must show 11' Z; select ' ^ This must show 11' Z;
Z Z
^ This must show 11 ^ This must show 11
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3; explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
Warnings: Warnings:
Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3` Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3; drop table t1, t2, t3;
create table t1 (a int, oref int, key(a)); create table t1 (a int, oref int, key(a));
insert into t1 values insert into t1 values
...@@ -692,6 +695,8 @@ a MAX(b) test ...@@ -692,6 +695,8 @@ a MAX(b) test
2 3 h 2 3 h
3 4 i 3 4 i
DROP TABLE t1, t2; DROP TABLE t1, t2;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
CREATE TABLE t1 (a int); CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int, PRIMARY KEY(b)); CREATE TABLE t2 (b int, PRIMARY KEY(b));
INSERT INTO t1 VALUES (1), (NULL), (4); INSERT INTO t1 VALUES (1), (NULL), (4);
...@@ -759,6 +764,7 @@ id select_type table type possible_keys key key_len ref rows Extra ...@@ -759,6 +764,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where 2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where
DROP TABLE t1, t2; DROP TABLE t1, t2;
set @@optimizer_switch=@save_optimizer_switch;
CREATE TABLE t1 (a INT); CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES(1); INSERT INTO t1 VALUES(1);
CREATE TABLE t2 (placeholder CHAR(11)); CREATE TABLE t2 (placeholder CHAR(11));
...@@ -960,7 +966,7 @@ i1 i2 ...@@ -960,7 +966,7 @@ i1 i2
# Baseline: # Baseline:
SHOW STATUS LIKE '%Handler_read_rnd_next'; SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value Variable_name Value
Handler_read_rnd_next 17 Handler_read_rnd_next 18
INSERT INTO t1 VALUES (NULL, NULL); INSERT INTO t1 VALUES (NULL, NULL);
FLUSH STATUS; FLUSH STATUS;
...@@ -977,7 +983,7 @@ i1 i2 ...@@ -977,7 +983,7 @@ i1 i2
# (read record from t1, but do not read from t2) # (read record from t1, but do not read from t2)
SHOW STATUS LIKE '%Handler_read_rnd_next'; SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value Variable_name Value
Handler_read_rnd_next 18 Handler_read_rnd_next 19
DROP TABLE t1,t2; DROP TABLE t1,t2;
End of 5.1 tests End of 5.1 tests
CREATE TABLE t1 ( CREATE TABLE t1 (
......
mysql-test/r/subselect3_jcl6.result
View file @ be4b955f
...@@ -67,12 +67,15 @@ Handler_read_rnd_next 11 ...@@ -67,12 +67,15 @@ Handler_read_rnd_next 11
select ' ^ This must show 11' Z; select ' ^ This must show 11' Z;
Z Z
^ This must show 11 ^ This must show 11
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3; explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
Warnings: Warnings:
Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3` Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3; drop table t1, t2, t3;
create table t1 (a int, oref int, key(a)); create table t1 (a int, oref int, key(a));
insert into t1 values insert into t1 values
...@@ -696,6 +699,8 @@ a MAX(b) test ...@@ -696,6 +699,8 @@ a MAX(b) test
2 3 h 2 3 h
3 4 i 3 4 i
DROP TABLE t1, t2; DROP TABLE t1, t2;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
CREATE TABLE t1 (a int); CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int, PRIMARY KEY(b)); CREATE TABLE t2 (b int, PRIMARY KEY(b));
INSERT INTO t1 VALUES (1), (NULL), (4); INSERT INTO t1 VALUES (1), (NULL), (4);
...@@ -763,6 +768,7 @@ id select_type table type possible_keys key key_len ref rows Extra ...@@ -763,6 +768,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where 2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where
DROP TABLE t1, t2; DROP TABLE t1, t2;
set @@optimizer_switch=@save_optimizer_switch;
CREATE TABLE t1 (a INT); CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES(1); INSERT INTO t1 VALUES(1);
CREATE TABLE t2 (placeholder CHAR(11)); CREATE TABLE t2 (placeholder CHAR(11));
...@@ -964,7 +970,7 @@ i1 i2 ...@@ -964,7 +970,7 @@ i1 i2
# Baseline: # Baseline:
SHOW STATUS LIKE '%Handler_read_rnd_next'; SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value Variable_name Value
Handler_read_rnd_next 17 Handler_read_rnd_next 18
INSERT INTO t1 VALUES (NULL, NULL); INSERT INTO t1 VALUES (NULL, NULL);
FLUSH STATUS; FLUSH STATUS;
...@@ -981,7 +987,7 @@ i1 i2 ...@@ -981,7 +987,7 @@ i1 i2
# (read record from t1, but do not read from t2) # (read record from t1, but do not read from t2)
SHOW STATUS LIKE '%Handler_read_rnd_next'; SHOW STATUS LIKE '%Handler_read_rnd_next';
Variable_name Value Variable_name Value
Handler_read_rnd_next 18 Handler_read_rnd_next 19
DROP TABLE t1,t2; DROP TABLE t1,t2;
End of 5.1 tests End of 5.1 tests
CREATE TABLE t1 ( CREATE TABLE t1 (
......
mysql-test/r/subselect_no_mat.result
View file @ be4b955f
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='materialization=off'; set optimizer_switch='materialization=off';
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
select (select 2); select (select 2);
(select 2) (select 2)
2 2
...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY ...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY
1 1
1 1
DROP TABLE t1; DROP TABLE t1;
set @@optimizer_switch=@save_optimizer_switch;
End of 5.1 tests. End of 5.1 tests.
set optimizer_switch=default; set optimizer_switch=default;
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
mysql-test/r/subselect_no_opts.result
View file @ be4b955f
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='materialization=off,semijoin=off'; set optimizer_switch='materialization=off,semijoin=off';
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
select (select 2); select (select 2);
(select 2) (select 2)
2 2
...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY ...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY
1 1
1 1
DROP TABLE t1; DROP TABLE t1;
set @@optimizer_switch=@save_optimizer_switch;
End of 5.1 tests. End of 5.1 tests.
set optimizer_switch=default; set optimizer_switch=default;
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
mysql-test/r/subselect_no_semijoin.result
View file @ be4b955f
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='semijoin=off'; set optimizer_switch='semijoin=off';
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
select (select 2); select (select 2);
(select 2) (select 2)
2 2
...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY ...@@ -4807,8 +4809,9 @@ SELECT 1 FROM t1 GROUP BY
1 1
1 1
DROP TABLE t1; DROP TABLE t1;
set @@optimizer_switch=@save_optimizer_switch;
End of 5.1 tests. End of 5.1 tests.
set optimizer_switch=default; set optimizer_switch=default;
show variables like 'optimizer_switch'; show variables like 'optimizer_switch';
Variable_name Value Variable_name Value
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
mysql-test/r/subselect_sj.result
View file @ be4b955f
...@@ -202,39 +202,39 @@ BUG#37120 optimizer_switch allowable values not according to specification ...@@ -202,39 +202,39 @@ BUG#37120 optimizer_switch allowable values not according to specification
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off'; set optimizer_switch='default,materialization=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off'; set optimizer_switch='default,semijoin=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,loosescan=off'; set optimizer_switch='default,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,materialization=off'; set optimizer_switch='default,semijoin=off,materialization=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off,semijoin=off'; set optimizer_switch='default,materialization=off,semijoin=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off'; set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,loosescan=off'; set optimizer_switch='default,semijoin=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off,loosescan=off'; set optimizer_switch='default,materialization=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch=default; set optimizer_switch=default;
drop table t0, t1, t2; drop table t0, t1, t2;
drop table t10, t11, t12; drop table t10, t11, t12;
......
mysql-test/r/subselect_sj_jcl6.result
View file @ be4b955f
...@@ -206,39 +206,39 @@ BUG#37120 optimizer_switch allowable values not according to specification ...@@ -206,39 +206,39 @@ BUG#37120 optimizer_switch allowable values not according to specification
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off'; set optimizer_switch='default,materialization=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off'; set optimizer_switch='default,semijoin=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,loosescan=off'; set optimizer_switch='default,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,materialization=off'; set optimizer_switch='default,semijoin=off,materialization=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off,semijoin=off'; set optimizer_switch='default,materialization=off,semijoin=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off'; set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,semijoin=off,loosescan=off'; set optimizer_switch='default,semijoin=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch='default,materialization=off,loosescan=off'; set optimizer_switch='default,materialization=off,loosescan=off';
select @@optimizer_switch; select @@optimizer_switch;
@@optimizer_switch @@optimizer_switch
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on
set optimizer_switch=default; set optimizer_switch=default;
drop table t0, t1, t2; drop table t0, t1, t2;
drop table t10, t11, t12; drop table t10, t11, t12;
......
mysql-test/t/ps.test
View file @ be4b955f
...@@ -163,6 +163,9 @@ create table t1 ...@@ -163,6 +163,9 @@ create table t1
) engine = MYISAM ; ) engine = MYISAM ;
create table t2 like t1; create table t2 like t1;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
set @stmt= ' explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25 ' ; set @stmt= ' explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25 ' ;
prepare stmt1 from @stmt ; prepare stmt1 from @stmt ;
execute stmt1 ; execute stmt1 ;
...@@ -171,6 +174,8 @@ explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 ...@@ -171,6 +174,8 @@ explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2
deallocate prepare stmt1; deallocate prepare stmt1;
drop tables t1,t2; drop tables t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
# #
# parameters from variables (for field creation) # parameters from variables (for field creation)
# #
......
mysql-test/t/subselect.test
View file @ be4b955f
...@@ -11,6 +11,9 @@ ...@@ -11,6 +11,9 @@
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12;
--enable_warnings --enable_warnings
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
select (select 2); select (select 2);
explain extended select (select 2); explain extended select (select 2);
SELECT (SELECT 1) UNION SELECT (SELECT 2); SELECT (SELECT 1) UNION SELECT (SELECT 2);
...@@ -4061,4 +4064,6 @@ SELECT 1 FROM t1 GROUP BY ...@@ -4061,4 +4064,6 @@ SELECT 1 FROM t1 GROUP BY
(SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1); (SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1);
DROP TABLE t1; DROP TABLE t1;
set @@optimizer_switch=@save_optimizer_switch;
--echo End of 5.1 tests. --echo End of 5.1 tests.
mysql-test/t/subselect3.test
View file @ be4b955f
...@@ -59,9 +59,13 @@ select a in (select max(ie) from t1 where oref=4 group by grp) from t3; ...@@ -59,9 +59,13 @@ select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
show status like 'Handler_read_rnd_next'; show status like 'Handler_read_rnd_next';
select ' ^ This must show 11' Z; select ' ^ This must show 11' Z;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
# This must show trigcond: # This must show trigcond:
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3; explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
set @@optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3; drop table t1, t2, t3;
# #
...@@ -529,6 +533,9 @@ SELECT a, MAX(b), ...@@ -529,6 +533,9 @@ SELECT a, MAX(b),
DROP TABLE t1, t2; DROP TABLE t1, t2;
# The next three test cases must be executed with the IN=>EXISTS strategy
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
# #
# Bug #27870: crash of an equijoin query with WHERE condition containing # Bug #27870: crash of an equijoin query with WHERE condition containing
...@@ -588,6 +595,8 @@ EXPLAIN SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2); ...@@ -588,6 +595,8 @@ EXPLAIN SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
DROP TABLE t1, t2; DROP TABLE t1, t2;
set @@optimizer_switch=@save_optimizer_switch;
# #
# Bug #34763: item_subselect.cc:1235:Item_in_subselect::row_value_transformer: # Bug #34763: item_subselect.cc:1235:Item_in_subselect::row_value_transformer:
# Assertion failed, unexpected error message: # Assertion failed, unexpected error message:
......
sql/opt_subselect.cc
View file @ be4b955f
...@@ -187,7 +187,11 @@ int check_and_do_in_subquery_rewrites(JOIN *join) ...@@ -187,7 +187,11 @@ int check_and_do_in_subquery_rewrites(JOIN *join)
does not call setup_subquery_materialization(). We could make does not call setup_subquery_materialization(). We could make
SELECT ... FROM DUAL call that function but that doesn't seem SELECT ... FROM DUAL call that function but that doesn't seem
to be the case that is worth handling. to be the case that is worth handling.
4. Subquery is non-correlated 4. Either the subquery predicate is a top-level predicate, or at
least one partial match strategy is enabled. If no partial match
strategy is enabled, then materialization cannot be used for
non-top-level queries because it cannot handle NULLs correctly.
5. Subquery is non-correlated
TODO: TODO:
This is an overly restrictive condition. It can be extended to: This is an overly restrictive condition. It can be extended to:
(Subquery is non-correlated || (Subquery is non-correlated ||
...@@ -195,13 +199,13 @@ int check_and_do_in_subquery_rewrites(JOIN *join) ...@@ -195,13 +199,13 @@ int check_and_do_in_subquery_rewrites(JOIN *join)
(Subquery is correlated to the immediate outer query && (Subquery is correlated to the immediate outer query &&
Subquery !contains {GROUP BY, ORDER BY [LIMIT], Subquery !contains {GROUP BY, ORDER BY [LIMIT],
aggregate functions}) && subquery predicate is not under "NOT IN")) aggregate functions}) && subquery predicate is not under "NOT IN"))
5. No execution method was already chosen (by a prepared statement). 6. No execution method was already chosen (by a prepared statement).
(*) The subquery must be part of a SELECT statement. The current (*) The subquery must be part of a SELECT statement. The current
condition also excludes multi-table update statements. condition also excludes multi-table update statements.
We have to determine whether we will perform subquery materialization Determine whether we will perform subquery materialization before
before calling the IN=>EXISTS transformation, so that we know whether to calling the IN=>EXISTS transformation, so that we know whether to
perform the whole transformation or only that part of it which wraps perform the whole transformation or only that part of it which wraps
Item_in_subselect in an Item_in_optimizer. Item_in_subselect in an Item_in_optimizer.
*/ */
...@@ -211,11 +215,14 @@ int check_and_do_in_subquery_rewrites(JOIN *join) ...@@ -211,11 +215,14 @@ int check_and_do_in_subquery_rewrites(JOIN *join)
select_lex->master_unit()->first_select()->leaf_tables && // 3 select_lex->master_unit()->first_select()->leaf_tables && // 3
thd->lex->sql_command == SQLCOM_SELECT && // * thd->lex->sql_command == SQLCOM_SELECT && // *
select_lex->outer_select()->leaf_tables && // 3A select_lex->outer_select()->leaf_tables && // 3A
subquery_types_allow_materialization(in_subs)) subquery_types_allow_materialization(in_subs) &&
// psergey-todo: duplicated_subselect_card_check: where it's done?
(in_subs->is_top_level_item() ||
optimizer_flag(thd, OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE) ||
optimizer_flag(thd, OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN)) &&//4
!in_subs->is_correlated && // 5
in_subs->exec_method == Item_in_subselect::NOT_TRANSFORMED) // 6
{ {
// psergey-todo: duplicated_subselect_card_check: where it's done?
if (!in_subs->is_correlated && // 4
in_subs->exec_method == Item_in_subselect::NOT_TRANSFORMED) // 5
in_subs->exec_method= Item_in_subselect::MATERIALIZATION; in_subs->exec_method= Item_in_subselect::MATERIALIZATION;
} }
......
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