path: root/mysql-test/t/query_cache.test

-- source include/have_query_cache.inc

#
# Tests with query cache
#
set GLOBAL query_cache_size=1355776;

# Reset query cache variables.

flush query cache; # This crashed in some versions
flush query cache; # This crashed in some versions
reset query cache;
flush status;
--disable_warnings
drop table if exists t1,t2,t3,t4,t11,t21;
drop database if exists mysqltest;
--enable_warnings

#
# First simple test
#

create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
select * from t1;
select sql_no_cache * from t1;
select length(now()) from t1;

# Only check the variables that are independent of the machine and startup
# options

show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

drop table t1;

show status like "Qcache_queries_in_cache";

#
# MERGE TABLES with INSERT/UPDATE and DELETE
#
create table t1 (a int not null);
insert into t1 values (1),(2),(3);
create table t2 (a int not null);
insert into t2 values (4),(5),(6);
create table t3 (a int not null) engine=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
# insert
select * from t3;
select * from t3;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
insert into t2  values (7);
show status like "Qcache_queries_in_cache";
select * from t1;
select * from t1;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
insert into t3 values (8);
show status like "Qcache_queries_in_cache";
# update
select * from t3;
show status like "Qcache_queries_in_cache";
update t2 set a=9 where a=7;
show status like "Qcache_queries_in_cache";
select * from t1;
show status like "Qcache_queries_in_cache";
update t3 set a=10 where a=1;
show status like "Qcache_queries_in_cache";
#delete
select * from t3;
show status like "Qcache_queries_in_cache";
delete from t2 where a=9;
show status like "Qcache_queries_in_cache";
select * from t1;
show status like "Qcache_queries_in_cache";
delete from t3 where a=10;
show status like "Qcache_queries_in_cache";
drop table t1, t2, t3;
#
# SELECT SQL_CACHE ...
#
set query_cache_type=demand;
create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
show status like "Qcache_queries_in_cache";
select sql_cache * from t1 union select * from t1;
set query_cache_type=2;
select sql_cache * from t1 union select * from t1;
select * from t1 union select sql_cache * from t1;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
set query_cache_type=on;
#
# RESET QUERY CACHE
#
reset query cache;
show status like "Qcache_queries_in_cache";
#
# SELECT SQL_NO_CACHE
#
select sql_no_cache * from t1;
show status like "Qcache_queries_in_cache";
drop table t1;
#
# Check that queries that uses NOW(), LAST_INSERT_ID()... are not cached.
#
create table t1 (a text not null);
select CONNECTION_ID() from t1;
#GET_LOCK
#RELEASE_LOCK
#LOAD_FILE
select FOUND_ROWS();
select NOW() from t1;
select CURDATE() from t1;
select CURTIME() from t1;
select DATABASE() from t1;
select ENCRYPT("test") from t1;
select LAST_INSERT_ID() from t1;
select RAND() from t1;
select UNIX_TIMESTAMP() from t1;
select USER() from t1;
select CURRENT_USER() from t1;
select benchmark(1,1) from t1;
explain extended select benchmark(1,1) from t1;
show status like "Qcache_queries_in_cache";
#
# Tests when the cache is filled
#
create table t2 (a text not null);
insert into t1 values("1111111111111111111111111111111111111111111111111111");
insert into t2 select * from t1;
insert into t1 select * from t2; # 2
insert into t2 select * from t1; # 3
insert into t1 select * from t2; # 5
insert into t2 select * from t1; # 8
insert into t1 select * from t2; # 13
insert into t2 select * from t1; # 21
insert into t1 select * from t2; # 34
insert into t2 select * from t1; # 55
insert into t1 select * from t2; # 89
insert into t2 select * from t1; # 144
insert into t1 select * from t2; # 233
insert into t2 select * from t1; # 357
insert into t1 select * from t2; # 610
insert into t2 select * from t1; # 987
insert into t1 select * from t2; # 1597
insert into t2 select * from t1; # 2584
insert into t1 select * from t2; # 4181

show status like "Qcache_hits";
show status like "Qcache_lowmem_prunes";
disable_result_log;
select a as a1, a as a2 from t1;
select a as a2, a as a3 from t1;
select a as a3, a as a4 from t1;
# next query must be out of 1Mb cache
select a as a1, a as a2 from t1;
enable_result_log;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
show status like "Qcache_lowmem_prunes";
reset query cache;
#
# Query bigger then query_cache_limit
#
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
disable_result_log;
select * from t1;
enable_result_log;
show status like "Qcache_queries_in_cache";
drop table t1,t2;

#
# noncachable ODBC work around (and prepare cache for drop database)
#
create database mysqltest;
create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i));
insert into mysqltest.t1 (a) values (1);
select * from mysqltest.t1 where i is null;

#
# drop db
#
create table t1(a int);
select * from t1;
show status like "Qcache_queries_in_cache";
select * from mysqltest.t1;
show status like "Qcache_queries_in_cache";
drop database mysqltest;
show status like "Qcache_queries_in_cache";
drop table t1;

#
# Charset convertion (cp1251_koi8 always present)
#
create table t1 (a char(1) not null collate koi8r_general_ci);
insert into t1 values(_koi8r"á");
set CHARACTER SET koi8r;
select * from t1;
set CHARACTER SET cp1251_koi8;
select * from t1;
set CHARACTER SET DEFAULT;
show status like "Qcache_queries_in_cache";
show status like "Qcache_hits";
drop table t1;

# The following tests can't be done as the values differen on 32 and 64 bit
#  machines :(
#show variables like "query_cache_size";
#show status like "Qcache_free_memory";

#
# same tables in different db
#
create database if not exists mysqltest;
create table mysqltest.t1 (i int not null);
create table t1 (i int not null);
insert into mysqltest.t1 (i) values (1);
insert into t1 (i) values (2);

select * from t1;
use mysqltest;
select * from t1;
select * from t1;
use test;
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_hits";

drop database mysqltest;
drop table t1;

#
# FOUND_ROWS()
#

create table t1 (i int not null);
insert into t1 (i) values (1),(2),(3),(4);

select SQL_CALC_FOUND_ROWS * from t1 limit 2;
select FOUND_ROWS();
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";

select * from t1 where i=1;
select FOUND_ROWS();
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";

select SQL_CALC_FOUND_ROWS * from t1 limit 2;
select FOUND_ROWS();
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";

select * from t1 where i=1;
select FOUND_ROWS();
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
drop table t1;

#
# Test insert delayed
#

flush query cache;
reset query cache;

create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
select * from t1;
show status like "Qcache_queries_in_cache";
insert delayed into t1 values (4);
--sleep 5	# Wait for insert delayed to be executed.
select a from t1;
show status like "Qcache_queries_in_cache";
drop table t1;
show status like "Qcache_queries_in_cache";

#
# Test of min result data unit size changing
#
show global variables like "query_cache_min_res_unit";
set GLOBAL query_cache_min_res_unit=1001;
show global variables like "query_cache_min_res_unit";
create table t1 (a int not null);
insert into t1 values (1),(2),(3);
create table t2 (a int not null);
insert into t2 values (1),(2),(3);
select * from t1;
select * from t1;
select * from t2;
select * from t2;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
drop table t1;
select a from t2;
select a from t2;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
drop table t2;
set GLOBAL query_cache_min_res_unit=default;
show global variables like "query_cache_min_res_unit";

#
# Case sensitive test
#
create table t1 (a int not null);
insert into t1 values (1);
select "aaa" from t1;
select "AAA" from t1;
drop table t1;

#
# Test of query cache resizing
#
create table t1 (a int);
set GLOBAL query_cache_size=1000;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=1024;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=10240;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=20480;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=40960;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=51200;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=61440;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=81920;
show global variables like "query_cache_size";
select * from t1;
set GLOBAL query_cache_size=102400;
show global variables like "query_cache_size";
select * from t1;
drop table t1;

#
# Temporary tables
#
set GLOBAL query_cache_size=1048576;
create table t1 (i int not null);
create table t2 (i int not null);
select * from t1;
show status like "Qcache_queries_in_cache";
create temporary table t3 (i int not null);
select * from t2;
show status like "Qcache_queries_in_cache";
select * from t3;
show status like "Qcache_queries_in_cache";
update t1 set i=(select distinct 1 from (select * from t2) a);
drop table t1, t2, t3;

#
# system databse test
#
use mysql;
disable_result_log;
select * from db;
enable_result_log;
show status like "Qcache_queries_in_cache";
use test;
disable_result_log;
select * from mysql.db;
enable_result_log;
show status like "Qcache_queries_in_cache";

#
# simple rename test
#
create table t1(id int auto_increment primary key);
insert into t1 values (NULL), (NULL), (NULL);
select * from t1 where id=2;
alter table t1 rename to t2;
-- error 1146
select * from t1 where id=2;
drop table t2;
-- error 1146
select * from t1 where id=2;

#
# Load data invalidation test
#
create table t1 (word char(20) not null);
select * from t1;
show status like "Qcache_queries_in_cache";
--replace_result $MYSQL_TEST_DIR TEST_DIR
eval load data infile '$MYSQL_TEST_DIR/std_data/words.dat' into table t1;
show status like "Qcache_queries_in_cache";
select count(*) from t1;
drop table t1;

#
# INTO OUTFILE/DUMPFILE test
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
show status like "Qcache_queries_in_cache";
select * from t1 into outfile "query_cache.out.file";
--error 1086
select * from t1 into outfile "query_cache.out.file";
select * from t1 limit 1 into dumpfile "query_cache.dump.file";
show status like "Qcache_queries_in_cache";
drop table t1;

#
# test of SQL_SELECT_LIMIT
#
create table t1 (a int);
insert into t1 values (1),(2);
show status like "Qcache_queries_in_cache";
select * from t1;
SET OPTION SQL_SELECT_LIMIT=1;
select * from t1;
show status like "Qcache_queries_in_cache";
SET OPTION SQL_SELECT_LIMIT=DEFAULT;
drop table t1;

#
# query cache crash on using same table twice in one query test
#
flush query cache;
reset query cache;
flush status;
set GLOBAL query_cache_size=1048576;

create table t1 (a int not null);
insert into t1 values (1),(2),(3);
create table t2 (a text not null);
create table t3 (a text not null);
insert into t3 values("1111111111111111111111111111111111111111111111111111");
insert into t2 select * from t3;
insert into t3 select * from t2;
insert into t2 select * from t3;
insert into t3 select * from t2;
insert into t2 select * from t3;
insert into t3 select * from t2;
insert into t2 select * from t3;
insert into t3 select * from t2;
insert into t2 select * from t3;
insert into t3 select * from t2;
drop table t2;
create table t2 (a int not null);
insert into t2 values (1),(2),(3);
create table t4 (a int not null);
insert into t4 values (1),(2),(3);

disable_result_log;
select * from t4;
select * from t2;
select * from t1 as tt, t1 as ttt  where tt.a=1 and ttt.a=2;
select * from t2;
select * from t4;
select * from t1 as tt, t1 as ttt  where tt.a=1 and ttt.a=2;
select * from t2;
select * from t4;
select * from t1 as tt, t1 as ttt  where tt.a=1 and ttt.a=2;

delete from t2 where a=1;
flush query cache;
select * from t3;
enable_result_log;
delete from t4 where a=1;
flush query cache;
drop table t1,t2,t3,t4;

#
# WRITE LOCK & QC
#
set query_cache_wlock_invalidate=1;
create table t1 (a int not null);
create table t2 (a int not null);
select * from t1;
select * from t2;
show status like "Qcache_queries_in_cache";
lock table t1 write, t2 read;
show status like "Qcache_queries_in_cache";
unlock table;
drop table t1,t2;
set query_cache_wlock_invalidate=default;

#
# hiding real table stored in query cache by temporary table
#
CREATE TABLE t1 (id INT PRIMARY KEY);
insert into t1 values (1),(2),(3);
select * from t1;
create temporary table t1 (a int not null auto_increment
primary key);
select * from t1;
drop table t1;
drop table t1;

#
# Test character set related variables:
#   character_set_result
#   character_set_client
#   charactet_set_connection/collation_connection
# If at least one of the above variables has changed,
# the cached query can't be reused. In the below test
# absolutely the same query is used several times,
# SELECT should fetch different results for every instance. 
# No hits should be produced.
# New cache entry should appear for every SELECT.
#
SET NAMES koi8r;
CREATE TABLE t1 (a char(1) character set koi8r);
INSERT INTO t1 VALUES (_koi8r'á'),(_koi8r'Á');
#
# Run select
#
SELECT a,'Â','â'='Â' FROM t1;
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
#
# Change collation_connection and run the same query again
#
set collation_connection=koi8r_bin;
SELECT a,'Â','â'='Â' FROM t1; 
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
#
# Now change character_set_client and run the same query again
#
set character_set_client=cp1251;
SELECT a,'Â','â'='Â' FROM t1; 
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
#
# And finally change character_set_results and run the same query again
#
set character_set_results=cp1251;
SELECT a,'Â','â'='Â' FROM t1; 
show status like "Qcache_hits";
show status like "Qcache_queries_in_cache";
SET NAMES default;

DROP TABLE t1;

#
# DROP current database test
#
CREATE TABLE t1 (a int(1));
CREATE DATABASE mysqltest;
USE mysqltest;
DROP DATABASE mysqltest;
SELECT * FROM test.t1;
USE test;
DROP TABLE t1;

#
# charset with NULL
#
set character_set_results=null;
select @@character_set_results;
set character_set_results=default;
#
# query cache and environment variables
#
# max_sort_length
set GLOBAL query_cache_size=1355776;
create table t1 (id int auto_increment primary key, c char(25));
insert into t1 set c = repeat('x',24);
insert into t1 set c = concat(repeat('x',24),'x');
insert into t1 set c = concat(repeat('x',24),'w');
insert into t1 set c = concat(repeat('x',24),'y');
set max_sort_length=200;   
select c from t1 order by c, id;
reset query cache;
set max_sort_length=20;
select c from t1 order by c, id;
set max_sort_length=200;   
select c from t1 order by c, id;
set max_sort_length=default;
# sql_mode
select '1' || '3' from t1;
set SQL_MODE=oracle;
select '1' || '3' from t1;
set SQL_MODE=default;
drop table t1;
# group_concat_max_len
create table t1 (a varchar(20), b int);
insert into t1 values ('12345678901234567890', 1);
set group_concat_max_len=10;
select group_concat(a) FROM t1 group by b;
set group_concat_max_len=1024;
select group_concat(a) FROM t1 group by b;
set group_concat_max_len=default;
drop table t1;

# comments before command
#
create table t1 (a int);
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
/**/ select * from t1;
/**/ select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";

#
# Keep things tidy
#
DROP TABLE t1;
SET GLOBAL query_cache_size=0;

#
# Information schema & query cache test
#
SET SESSION query_cache_type = 2;
create table t1(a int);
select table_name from information_schema.tables
where table_schema="test";
drop table t1;
select table_name from information_schema.tables
where table_schema="test";
# Bug #8480: REPAIR TABLE needs to flush the table from the query cache
SET SESSION query_cache_type = 1;
set global query_cache_size=1024*1024;
flush query cache;
create table t1 ( a int );
insert into t1 values (1);
select a from t1;
select a from t1;
show status like 'qcache_queries_in_cache';
repair table t1;
show status like 'qcache_queries_in_cache';
drop table t1;

#
# Bug #9549: Make sure cached queries that span more than one cache block
# are handled properly in the embedded server.
#
# We just want a small query cache, so we can fragment it easily
set GLOBAL query_cache_size=64*1024;
# This actually gives us a usable cache size of about 48K

# Each table is about 14K
create table t1 (a text);
insert into t1 values (repeat('abcdefghijklmnopqrstuvwxyz', 550));
create table t2 (a text);
insert into t2 values (repeat('ijklmnopqrstuvwxyzabcdefgh', 550));

# Load a query from each table into the query cache
--disable_result_log
select a from t1; # Q1
select a from t2; # Q2
--enable_result_log
show status like 'Qcache_%_blocks';

# Now the cache looks like (14K for Q1)(14K for Q2)(20K free)

# Flush Q1 from the cache by adding an out-of-order chunk to t1
insert into t1 select reverse(a) from t1;
show status like 'Qcache_%_blocks';

# Now the cache looks like (14K free)(14K for Q2)(20K free)

# Load our new data into the query cache
--disable_result_log
select a from t1;  # Q3
--enable_result_log
show status like 'Qcache_%_blocks';

# Now the cache should be like (14K for Q3)(14K for Q2)(14K for Q3)(6K free)

# Note that Q3 is split across two chunks!

# Load Q3 from the cache, and actually pay attention to the results
select a from t1;

flush query cache;

drop table t1, t2;
set GLOBAL query_cache_size=1355776


#
# Query with warning prohibited to query cache (BUG#9414)
#
flush status;
CREATE TABLE t1 (
  `date` datetime NOT NULL default '0000-00-00 00:00:00',
  KEY `date` (`date`)
) ENGINE=MyISAM;

INSERT INTO t1 VALUES ('20050326');
INSERT INTO t1 VALUES ('20050325');
SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 invalid';
SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 invalid';
SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 invalid';
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1;

#
# queries with subquery in the FROM clause (BUG#11522)
#
create table t1 (a int);
insert into t1 values (1);
reset query cache;
flush status;
select * from (select * from t1) a;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from (select * from t1) a;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
insert into t1 values (2);
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from (select * from t1) a;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1;

#
# BUG#14652: Queries with leading '(' characters.
#
create table t1 (a int);
flush status;
(select a from t1) union (select a from t1);
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
(select a from t1) union (select a from t1);
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1;
# SP cursors and selects with query cache (BUG#9715)
#
create table t1 (a int);
insert into t1 values (1),(2);

delimiter //;
CREATE PROCEDURE `p1`()
begin
Declare c1 cursor for select a from t1;
open c1;
select * from t1;
end//
call p1()//
drop procedure p1;

create function f1() returns int
begin
Declare var1 int;
select max(a) from t1 into var1;
return var1;
end//
create procedure `p1`()
begin
 select a, f1() from t1;
end//
call p1()//
drop procedure p1//
drop function f1//

drop table t1//
delimiter ;//

#
# query in QC from normal execution and SP (BUG#6897)
# improved to also test BUG#3583 and BUG#12990
#
flush query cache;
reset query cache;
flush status;
delimiter //;
create table t1 (s1 int)//
create procedure f1 () begin
select sql_cache * from t1;
select sql_cache * from t1;
select sql_cache * from t1;
end;//
create procedure f2 () begin
select sql_cache * from t1 where s1=1;
select sql_cache * from t1;
end;//
create procedure f3 () begin
select sql_cache * from t1;
select sql_cache * from t1 where s1=1;
end;//
create procedure f4 () begin
select sql_cache * from t1;
select sql_cache * from t1 where s1=1;
select sql_cache * from t1;
select sql_cache * from t1 where s1=1;
select sql_cache * from t1 where s1=1;
end;//
delimiter ;//
call f1();
call f1();
call f1();
select sql_cache * from t1;
insert into t1 values (1);
select sql_cache * from t1;
call f1();
call f1();
select sql_cache * from t1;
flush query cache;
reset query cache;
flush status;
select sql_cache * from t1;
select sql_cache * from t1 where s1=1;
call f1();
call f2();
call f3();
call f4();
call f4();
call f3();
call f2();
select sql_cache * from t1 where s1=1;
insert into t1 values (2);
call f1();
select sql_cache * from t1 where s1=1;
select sql_cache * from t1;
call f1();
call f3();
call f3();
call f1();

drop procedure f1;
drop procedure f2;
drop procedure f3;
drop procedure f4;
drop table t1;
set GLOBAL query_cache_size=0;

# End of 4.1 tests

#
# Bug #10303: problem with last_query_cost
#

SET GLOBAL query_cache_size=102400;
create table t1(a int);
insert into t1 values(0), (1), (4), (5);
select * from t1 where a > 3;
select * from t1 where a > 3;
show status like 'last_query_cost';
drop table t1;
SET GLOBAL query_cache_size=0;