query_cache.result 12.4 KB
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flush query cache;
flush query cache;
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reset query cache;
flush status;
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drop table if exists t1,t2,t3,t11,t21, mysqltest.t1;
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create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
a
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select * from t1;
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select sql_no_cache * from t1;
a
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select length(now()) from t1;
length(now())
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show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
show status like "Qcache_inserts";
Variable_name	Value
Qcache_inserts	1
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	1
drop table t1;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
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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) type=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
select * from t3;
a
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select * from t3;
a
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show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
insert into t2  values (7);
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t1;
a
1
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3
select * from t1;
a
1
2
3
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
insert into t3 values (8);
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t3;
a
1
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8
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7
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
update t2 set a=9 where a=7;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t1;
a
1
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8
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
update t3 set a=10 where a=1;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t3;
a
10
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8
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9
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
delete from t2 where a=9;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t1;
a
10
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3
8
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
delete from t3 where a=10;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1, t2, t3;
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;
a
1
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select * from t2;
a
1
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3
insert into t1 values (4);
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	2
flush query cache;
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
drop table t1, t2;
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create table t1 (a text not null);
create table t11 (a text not null);
create table t2 (a text not null);
create table t21 (a text not null);
create table t3 (a text not null);
insert into t1 values("1111111111111111111111111111111111111111111111111111");
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;
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;
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insert into t11 select * from t1;
insert into t21 select * from t1;
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insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t3 select * from t1;
insert into t3 select * from t2;
insert into t3 select * from t1;
select * from t11;
select * from t21;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	7
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
insert into t11 values("");
select * from t3;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	8
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
flush query cache;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	7
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
drop table t1, t2, t3, t11, t21;
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set query_cache_type=demand;
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create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select sql_cache * from t1;
a
1
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set query_cache_type=2;
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select sql_cache * from t1;
a
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show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	4
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
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set query_cache_type=on;
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reset query cache;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select sql_no_cache * from t1;
a
1
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3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1;
create table t1 (a text not null);
select CONNECTION_ID() from t1;
CONNECTION_ID()
select FOUND_ROWS();
FOUND_ROWS()
0
select NOW() from t1;
NOW()
select CURDATE() from t1;
CURDATE()
select CURTIME() from t1;
CURTIME()
select DATABASE() from t1;
DATABASE()
select ENCRYPT("test") from t1;
ENCRYPT("test")
select LAST_INSERT_ID() from t1;
last_insert_id()
select RAND() from t1;
RAND()
select UNIX_TIMESTAMP() from t1;
UNIX_TIMESTAMP()
select USER() from t1;
USER()
select benchmark(1,1) from t1;
benchmark(1,1)
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
create table t2 (a text not null);
insert into t1 values("1111111111111111111111111111111111111111111111111111");
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;
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;
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	4
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show status like "Qcache_lowmem_prunes";
Variable_name	Value
Qcache_lowmem_prunes	0
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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;
select a as a1, a as a2 from t1;
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	4
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
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show status like "Qcache_lowmem_prunes";
Variable_name	Value
Qcache_lowmem_prunes	2
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reset query cache;
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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;
select * from t1;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1,t2;
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create database if not exists mysqltest;
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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;
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i	a
1	1
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select * from mysqltest.t1;
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i	a
1	1
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
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drop database mysqltest;
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show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
create table t1 (a char(1) not null);
insert into t1 values("");
select * from t1;
a

set CHARACTER SET cp1251_koi8;
select * from t1;
a

set CHARACTER SET DEFAULT;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
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show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	4
drop table t1;
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;
i
2
use mysqltest;
select * from t1;
i
1
select * from t1;
i
1
use test;
select * from t1;
i
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	6
drop database mysqltest;
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drop table t1;
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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;
i
1
2
select FOUND_ROWS();
FOUND_ROWS()
4
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	6
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
select * from t1 where i=1;
i
1
select FOUND_ROWS();
FOUND_ROWS()
1
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	6
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
select SQL_CALC_FOUND_ROWS * from t1 limit 2;
i
1
2
select FOUND_ROWS();
FOUND_ROWS()
4
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	7
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
select * from t1 where i=1;
i
1
select FOUND_ROWS();
FOUND_ROWS()
1
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	8
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
drop table t1;
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flush query cache;
reset query cache;
create table t1 (a int not null);
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
insert delayed into t1 values (4);
select a from t1;
a
1
2
3
4
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
drop table t1;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
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set GLOBAL query_cache_size=1000;
show global variables like "query_cache_size";
Variable_name	Value
query_cache_size	0
set GLOBAL query_cache_size=1100;
set GLOBAL query_cache_size=1200;
set GLOBAL query_cache_size=1300;
set GLOBAL query_cache_size=1400;
set GLOBAL query_cache_size=1500;
set GLOBAL query_cache_size=1600;
set GLOBAL query_cache_size=1700;
set GLOBAL query_cache_size=1800;
set GLOBAL query_cache_size=1900;
show global variables like "query_cache_size";
Variable_name	Value
query_cache_size	1024
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set GLOBAL query_cache_size=1048576;
create table t1 (i int not null);
create table t2 (i int not null);
select * from t1;
i
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
create temporary table t3 (i int not null);
select * from t2;
i
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
select * from t3;
i
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	2
drop table t1, t2, t3;
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use mysql;
select * from db;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
use test;
select * from mysql.db;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
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create table t1(id int auto_increment primary key);
insert into t1 values (NULL), (NULL), (NULL);
select * from t1 where id=2;
id
2
alter table t1 rename to t2;
select * from t1 where id=2;
Table 'test.t1' doesn't exist
drop table t2;
select * from t1 where id=2;
Table 'test.t1' doesn't exist
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create table t1 (word char(20) not null);
select * from t1;
word
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
load data infile '../../std_data/words.dat' into table t1;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1;
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drop table if exists t1;
create table t1 (a int);
insert into t1 values (1),(2),(3);
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
select * from t1 into outfile "query_caceh.out.file";
select * from t1 limit 1 into dumpfile "query_cache.dump.file";
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1;