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mariadb/mysql-test/t/subquery_cache.test
unknown ceb5468fd8 Subquery cache (MWL#66) added. 
libmysqld/Makefile.am:
  The new file added.
mysql-test/r/index_merge_myisam.result:
  subquery_cache optimization option added.
mysql-test/r/myisam_mrr.result:
  subquery_cache optimization option added.
mysql-test/r/subquery_cache.result:
  The subquery cache tests added.
mysql-test/r/subselect3.result:
  Subquery cache switched off to avoid changing read statistics.
mysql-test/r/subselect3_jcl6.result:
  Subquery cache switched off to avoid changing read statistics.
mysql-test/r/subselect_no_mat.result:
  subquery_cache optimization option added.
mysql-test/r/subselect_no_opts.result:
  subquery_cache optimization option added.
mysql-test/r/subselect_no_semijoin.result:
  subquery_cache optimization option added.
mysql-test/r/subselect_sj.result:
  subquery_cache optimization option added.
mysql-test/r/subselect_sj_jcl6.result:
  subquery_cache optimization option added.
mysql-test/t/subquery_cache.test:
  The subquery cache tests added.
mysql-test/t/subselect3.test:
  Subquery cache switched off to avoid changing read statistics.
sql/CMakeLists.txt:
  The new file added.
sql/Makefile.am:
  The new files added.
sql/item.cc:
  Expression cache item (Item_cache_wrapper) added.
  Item_ref and Item_field fixed for correct usage of result field and fast resolwing in SP.
sql/item.h:
  Expression cache item (Item_cache_wrapper) added.
  Item_ref and Item_field fixed for correct usage of result field and fast resolwing in SP.
sql/item_cmpfunc.cc:
  Subquery cache added.
sql/item_cmpfunc.h:
  Subquery cache added.
sql/item_subselect.cc:
  Subquery cache added.
sql/item_subselect.h:
  Subquery cache added.
sql/item_sum.cc:
  Registration of subquery parameters added.
sql/mysql_priv.h:
  subquery_cache optimization option added.
sql/mysqld.cc:
  subquery_cache optimization option added.
sql/opt_range.cc:
  Fix due to subquery cache.
sql/opt_subselect.cc:
  Parameters of the function cahnged.
sql/procedure.h:
  .h file guard added.
sql/sql_base.cc:
  Registration of subquery parameters added.
sql/sql_class.cc:
  Option to allow add indeces to temporary table.
sql/sql_class.h:
  Item iterators added.
  Option to allow add indeces to temporary table.
sql/sql_expression_cache.cc:
  Expression cache for caching subqueries added.
sql/sql_expression_cache.h:
  Expression cache for caching subqueries added.
sql/sql_lex.cc:
  Registration of subquery parameters added.
sql/sql_lex.h:
  Registration of subqueries and subquery parameters added.
sql/sql_select.cc:
  Subquery cache added.
sql/sql_select.h:
  Subquery cache added.
sql/sql_union.cc:
  A new parameter to the function added.
sql/sql_update.cc:
  A new parameter to the function added.
sql/table.cc:
  Procedures to manage temporarty tables index added.
sql/table.h:
  Procedures to manage temporarty tables index added.
storage/maria/ha_maria.cc:
  Fix of handler to allow destoy a table in case of error during the table creation.
storage/maria/ha_maria.h:
  .h file guard added.
storage/myisam/ha_myisam.cc:
  Fix of handler to allow destoy a table in case of error during the table creation.
2010-07-10 13:37:30 +03:00

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set optimizer_switch='subquery_cache=on';
create table t1 (a int, b int);
insert into t1 values (1,2),(3,4),(1,2),(3,4),(3,4),(4,5),(4,5),(5,6),(5,6),(4,5);
create table t2 (c int, d int);
insert into t2 values (2,3),(3,4),(5,6),(4,1);
--echo *
--echo * Test subquery as top item in different clauses
--echo *
--echo #single value subquery test (SELECT list)
flush status;
select a, (select d from t2 where b=c) from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select a, (select d from t2 where b=c) from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (where)
flush status;
select a from t1 where (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select a from t1 where (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (having)
flush status;
select a from t1 where a > 0 having (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select a from t1 where a > 0 having (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (OUTER JOIN ON)
flush status;
select ta.a, tb.a from t1 ta join t1 tb on (select d from t2 where tb.b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select ta.a, tb.a from t1 ta join t1 tb on (select d from t2 where tb.b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (GROUP BY)
flush status;
select max(a) from t1 GROUP BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select max(a) from t1 GROUP BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (distinct GROUP BY)
flush status;
select distinct max(a) from t1 GROUP BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select distinct max(a) from t1 GROUP BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (ORDER BY)
flush status;
select a from t1 ORDER BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select a from t1 ORDER BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (distinct ORDER BY)
flush status;
select distinct a from t1 ORDER BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select distinct a from t1 ORDER BY (select d from t2 where b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (LEFT JOIN ON)
flush status;
select ta.a, tb.a from t1 ta left join t1 tb on (select d from t2 where tb.b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=off';
flush status;
select ta.a, tb.a from t1 ta left join t1 tb on (select d from t2 where tb.b=c);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
--echo #single value subquery test (PS)
prepare stmt1 from 'select a, (select d from t2 where b=c) + 1 from t1';
execute stmt1;
show status like "subquery_cache%";
execute stmt1;
show status like "subquery_cache%";
deallocate prepare stmt1;
--echo #single value subquery test (SP)
CREATE PROCEDURE p1() select a, (select d from t2 where b=c) + 1 from t1;
call p1;
call p1;
drop procedure p1;
--echo #IN subquery test
flush status;
show status like "subquery_cache%";
select a, b , b in (select d from t2) as SUBS from t1;
show status like "subquery_cache%";
insert into t1 values (7,8),(9,NULL);
select a, b , b in (select d from t2) as SUBS from t1;
show status like "subquery_cache%";
insert into t2 values (8,NULL);
select a, b , b in (select d from t2) as SUBS from t1;
show status like "subquery_cache%";
--echo # multicolumn NOT IN with NULLs
flush status;
set optimizer_switch='subquery_cache=off';
select a, b, (b, a) not in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
set optimizer_switch='subquery_cache=on';
select a, b, (b, a) not in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
--echo # multicolumn NOT IN with NULLs (other order)
flush status;
set optimizer_switch='subquery_cache=off';
select a, b, (a, b) not in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
set optimizer_switch='subquery_cache=on';
select a, b, (a, b) not in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
--echo # multicolumn IN with NULLs
flush status;
set optimizer_switch='subquery_cache=off';
select a, b, (b, a) in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
set optimizer_switch='subquery_cache=on';
select a, b, (b, a) in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
--echo # multicolumn IN with NULLs (other order)
flush status;
set optimizer_switch='subquery_cache=off';
select a, b, (a, b) in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
set optimizer_switch='subquery_cache=on';
select a, b, (a, b) in (select d, c from t2) as SUBS from t1;
show status like "subquery_cache%";
--echo #IN subquery test (PS)
delete from t1 where a > 6;
delete from t2 where c > 6;
prepare stmt1 from 'select a, b , b in (select d from t2) as SUBS from t1';
execute stmt1;
show status like "subquery_cache%";
execute stmt1;
show status like "subquery_cache%";
insert into t1 values (7,8),(9,NULL);
execute stmt1;
show status like "subquery_cache%";
execute stmt1;
show status like "subquery_cache%";
insert into t2 values (8,NULL);
execute stmt1;
show status like "subquery_cache%";
execute stmt1;
show status like "subquery_cache%";
deallocate prepare stmt1;
--echo #IN subquery test (SP)
delete from t1 where a > 6;
delete from t2 where c > 6;
CREATE PROCEDURE p1() select a, b , b in (select d from t2) as SUBS from t1;
call p1();
show status like "subquery_cache%";
call p1();
show status like "subquery_cache%";
insert into t1 values (7,8),(9,NULL);
call p1();
show status like "subquery_cache%";
call p1();
show status like "subquery_cache%";
insert into t2 values (8,NULL);
call p1();
show status like "subquery_cache%";
call p1();
show status like "subquery_cache%";
drop procedure p1;
--echo # test of simple exists
select a, b , exists (select * from t2 where b=d) as SUBS from t1;
--echo # test of prepared statement exists
show status like "subquery_cache%";
prepare stmt1 from 'select a, b , exists (select * from t2 where b=d) as SUBS from t1';
execute stmt1;
show status like "subquery_cache%";
execute stmt1;
show status like "subquery_cache%";
deallocate prepare stmt1;
--echo # test of stored procedure exists
CREATE PROCEDURE p1() select a, b , exists (select * from t2 where b=d) as SUBS from t1;
call p1;
call p1;
drop procedure p1;
--echo #several subqueries
set optimizer_switch='subquery_cache=off';
flush status;
select a, b , exists (select * from t2 where b=d) as SUBSE, b in (select d from t2) as SUBSI, (select d from t2 where b=c) SUBSR from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
flush status;
select a, b , exists (select * from t2 where b=d) as SUBSE, b in (select d from t2) as SUBSI, (select d from t2 where b=c) SUBSR from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
--echo #several subqueries (several levels)
set optimizer_switch='subquery_cache=off';
flush status;
set optimizer_switch='subquery_cache=off';
flush status;
select a, b, (select exists (select * from t2 where b=d) from t2 where b=c) as SUNS1 from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
flush status;
select a, b, (select exists (select * from t2 where b=d) from t2 where b=c) as SUNS1 from t1;
show status like "subquery_cache%";
show status like '%Handler_read%';
--echo #clean up
drop table t1,t2;
--echo test different types
--echo #int
CREATE TABLE t1 ( a int, b int);
INSERT INTO t1 VALUES(1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2);
DROP TABLE t1;
--echo #char
CREATE TABLE t1 ( a char(1), b char (1));
INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2');
DROP TABLE t1;
--echo #decimal
CREATE TABLE t1 ( a decimal(3,1), b decimal(3,1));
INSERT INTO t1 VALUES(1,1),(2,2),(3,3);
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2);
DROP TABLE t1;
--echo #date
CREATE TABLE t1 ( a date, b date);
INSERT INTO t1 VALUES('1000-01-01','1000-01-01'),('2000-02-01','2000-02-01'),('3000-03-03','3000-03-03');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-01');
DROP TABLE t1;
--echo #datetime
CREATE TABLE t1 ( a datetime, b datetime);
INSERT INTO t1 VALUES('1000-01-01 01:01:01','1000-01-01 01:01:01'),('2000-02-02 02:02:02','2000-02-02 02:02:02'),('3000-03-03 03:03:03','3000-03-03 03:03:03');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-02 02:02:02');
DROP TABLE t1;
--echo #time
CREATE TABLE t1 ( a time, b time);
INSERT INTO t1 VALUES('01:01:01','01:01:01'),('02:02:02','02:02:02'),('03:03:03','03:03:03');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '02:02:02');
DROP TABLE t1;
--echo #timestamp
CREATE TABLE t1 ( a timestamp, b timestamp);
INSERT INTO t1 VALUES('2000-02-02 01:01:01','2000-02-02 01:01:01'),('2000-02-02 02:02:02','2000-02-02 02:02:02'),('2000-02-02 03:03:03','2000-02-02 03:03:03');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-02 02:02:02');
DROP TABLE t1;
--echo #bit
CREATE TABLE t1 ( a bit(20), b bit(20));
INSERT INTO t1 VALUES(1,1),(2,2),(3,3);
SELECT a+0 FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2);
DROP TABLE t1;
--echo #enum
CREATE TABLE t1 ( a enum('1','2','3'), b enum('1','2','3'));
INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2');
DROP TABLE t1;
--echo #set
CREATE TABLE t1 ( a set('1','2','3'), b set('1','2','3'));
INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2');
DROP TABLE t1;
--echo #blob
CREATE TABLE t1 ( a blob, b blob);
INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3');
SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2');
DROP TABLE t1;
--echo #geometry
CREATE TABLE t1 ( a geometry, b geometry);
INSERT INTO t1 VALUES(POINT(1,1),POINT(1,1)),(POINT(2,2),POINT(2,2)),(POINT(3,3),POINT(3,3));
SELECT astext(a) FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = POINT(2,2));
DROP TABLE t1;
--echo #uncacheable queries test (random and side effect)
flush status;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (2), (4), (1), (3);
select a, a in (select a from t1) from t1 as ext;
show status like "subquery_cache%";
select a, a in (select a from t1 where -1 < rand()) from t1 as ext;
show status like "subquery_cache%";
select a, a in (select a from t1 where -1 < benchmark(a,100)) from t1 as ext;
show status like "subquery_cache%";
drop table t1;
--echo #test of sql_big_tables switch and outer table reference in subquery with grouping
set option sql_big_tables=1;
CREATE TABLE t1 (a INT PRIMARY KEY, b INT);
INSERT INTO t1 VALUES (1,1),(2,1),(3,2),(4,2),(5,3),(6,3);
SELECT (SELECT t1_outer.a FROM t1 AS t1_inner GROUP BY b LIMIT 1) FROM t1 AS t1_outer;
drop table t1;
set option sql_big_tables=0;
--echo #test of function reference to outer query
set local group_concat_max_len=400;
create table t2 (a int, b int);
insert into t2 values (1,1), (2,2);
select b x, (select group_concat(x) from t2) from t2;
drop table t2;
set local group_concat_max_len=default;
--echo #aggregate functions
CREATE TABLE t1 (a int, b INT);
CREATE TABLE t2 (c int, d INT);
insert into t1 values (2,1), (3,1), (2,4), (3,4), (10,2), (20,2), (2,5),
(3,5), (100,3), (200,3), (10,6), (20,6), (20,7), (100,8), (200,8);
insert into t2 values (1,1),(3,3),(20,20);
--echo aggregate function as parameter of subquery
set optimizer_switch='subquery_cache=off';
flush status;
select max(a), (select max(a) from t2 where max(a)=c) from t1 group by b;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
flush status;
select max(a), (select max(a) from t2 where max(a)=c) from t1 group by b;
show status like "subquery_cache%";
show status like '%Handler_read%';
--echo argument of aggregate function as parameter of subquery (illegal use)
set optimizer_switch='subquery_cache=off';
flush status;
select max(a), (select a from t2 where a=c) from t1 group by b;
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='subquery_cache=on';
flush status;
select max(a), (select a from t2 where a=c) from t1 group by b;
show status like "subquery_cache%";
show status like '%Handler_read%';
drop table t1,t2;
--echo #test of flattening subquery optimisations and cache
create table t0 (a int);
insert into t0 values (9),(8),(7),(6),(5),(4),(3),(2),(1),(0);
create table t1(a int, b int);
insert into t1 values
(0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2);
create table t2 (pk int, a int, primary key(pk));
insert into t2 select a,a from t0;
set optimizer_switch='default,semijoin=on,materialization=on,subquery_cache=on';
flush status;
select * from t1 where a in (select pk from t2);
show status like "subquery_cache%";
show status like '%Handler_read%';
alter table t2 drop primary key;
set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=off';
explain select * from t1 where a in (select pk from t2);
flush status;
select * from t1 where a in (select pk from t2);
show status like "subquery_cache%";
show status like '%Handler_read%';
set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=on';
explain select * from t1 where a in (select pk from t2);
flush status;
select * from t1 where a in (select pk from t2);
show status like "subquery_cache%";
show status like '%Handler_read%';
#TODO: switch off cache if materialization used
set optimizer_switch='default,semijoin=off,materialization=on,subquery_cache=on';
explain select * from t1 where a in (select pk from t2);
flush status;
select * from t1 where a in (select pk from t2);
show status like "subquery_cache%";
show status like '%Handler_read%';
drop table t0,t1,t2;
set optimizer_switch='default';
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