mirror of
https://github.com/MariaDB/server.git
synced 2025-10-27 05:56:07 +03:00
1279 lines
54 KiB
Plaintext
1279 lines
54 KiB
Plaintext
set GLOBAL query_cache_size=1355776;
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flush query cache;
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flush query cache;
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reset query cache;
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flush status;
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drop table if exists t1,t2,t3,t4,t11,t21,t1_1,t1_2,t9,t9_1,t9_2;
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drop database if exists mysqltest;
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drop table if exists ```a`;
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drop view if exists v1;
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create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
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select * from t1;
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a
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1
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2
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3
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select * from t1;
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a
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1
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2
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3
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select sql_no_cache * from t1;
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a
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1
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2
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3
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select length(now()) from t1;
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length(now())
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19
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19
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19
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 1
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 1
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drop table t1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
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create table t2 (a int not null);
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insert into t2 values (4),(5),(6);
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create table t3 (a int not null) engine=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
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select * from t3;
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a
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1
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2
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3
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4
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5
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6
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select * from t3;
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a
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1
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2
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3
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4
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5
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6
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 2
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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insert into t2 values (7);
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t1;
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a
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1
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2
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3
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select * from t1;
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a
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1
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2
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3
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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insert into t3 values (8);
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t3;
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a
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1
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2
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3
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8
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4
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5
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6
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7
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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update t2 set a=9 where a=7;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t1;
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a
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1
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2
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3
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8
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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update t3 set a=10 where a=1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t3;
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a
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10
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2
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3
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8
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4
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5
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6
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9
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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delete from t2 where a=9;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t1;
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a
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10
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2
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3
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8
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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delete from t3 where a=10;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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drop table t1, t2, t3;
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set query_cache_type=demand;
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create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
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select * from t1;
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a
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1
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2
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3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select sql_cache * from t1 union select * from t1;
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a
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1
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2
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3
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set query_cache_type=2;
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select sql_cache * from t1 union select * from t1;
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a
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1
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2
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3
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select * from t1 union select sql_cache * from t1;
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a
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1
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2
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3
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 4
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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set query_cache_type=on;
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reset query cache;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select sql_no_cache * from t1;
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a
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1
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2
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3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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drop table t1;
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create table t1 (a text not null);
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select CONNECTION_ID() from t1;
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CONNECTION_ID()
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select FOUND_ROWS();
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FOUND_ROWS()
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0
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select NOW() from t1;
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NOW()
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select CURDATE() from t1;
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CURDATE()
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select CURTIME() from t1;
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CURTIME()
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select DATABASE() from t1;
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DATABASE()
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select ENCRYPT("test") from t1;
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ENCRYPT("test")
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select LAST_INSERT_ID() from t1;
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LAST_INSERT_ID()
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select RAND() from t1;
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RAND()
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select UNIX_TIMESTAMP() from t1;
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UNIX_TIMESTAMP()
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select USER() from t1;
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USER()
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select CURRENT_USER() from t1;
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CURRENT_USER()
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select benchmark(1,1) from t1;
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benchmark(1,1)
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explain extended select benchmark(1,1) from t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 0 0.00 const row not found
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Warnings:
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Note 1003 select benchmark(1,1) AS `benchmark(1,1)` from `test`.`t1`
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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create table t2 (a text not null);
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insert into t1 values("1111111111111111111111111111111111111111111111111111");
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 4
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show status like "Qcache_lowmem_prunes";
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Variable_name Value
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Qcache_lowmem_prunes 0
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select a as a1, a as a2 from t1;
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select a as a2, a as a3 from t1;
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select a as a3, a as a4 from t1;
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select a as a1, a as a2 from t1;
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 4
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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show status like "Qcache_lowmem_prunes";
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Variable_name Value
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Qcache_lowmem_prunes 2
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reset query cache;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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insert into t2 select * from t1;
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insert into t1 select * from t2;
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select * from t1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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drop table t1,t2;
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create database mysqltest;
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create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i));
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insert into mysqltest.t1 (a) values (1);
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select * from mysqltest.t1 where i is null;
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i a
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1 1
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create table t1(a int);
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select * from t1;
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a
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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select * from mysqltest.t1;
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i a
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1 1
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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drop database mysqltest;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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drop table t1;
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create table t1 (a char(1) not null collate koi8r_general_ci);
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insert into t1 values(_koi8r"<22>");
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set CHARACTER SET koi8r;
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select * from t1;
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a
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<EFBFBD>
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set CHARACTER SET cp1251_koi8;
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select * from t1;
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a
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<EFBFBD>
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set CHARACTER SET DEFAULT;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 4
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drop table t1;
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create database if not exists mysqltest;
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create table mysqltest.t1 (i int not null);
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create table t1 (i int not null);
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insert into mysqltest.t1 (i) values (1);
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insert into t1 (i) values (2);
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select * from t1;
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i
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2
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use mysqltest;
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select * from t1;
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i
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1
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select * from t1;
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i
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1
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use test;
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select * from t1;
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i
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2
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 6
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drop database mysqltest;
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drop table t1;
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create table t1 (i int not null);
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insert into t1 (i) values (1),(2),(3),(4);
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select SQL_CALC_FOUND_ROWS * from t1 limit 2;
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i
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1
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2
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select FOUND_ROWS();
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FOUND_ROWS()
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4
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 6
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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select * from t1 where i=1;
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i
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1
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select FOUND_ROWS();
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FOUND_ROWS()
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1
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 6
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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select SQL_CALC_FOUND_ROWS * from t1 limit 2;
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i
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1
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2
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select FOUND_ROWS();
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FOUND_ROWS()
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4
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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select * from t1 where i=1;
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i
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1
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select FOUND_ROWS();
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FOUND_ROWS()
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1
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 8
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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drop table t1;
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flush query cache;
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reset query cache;
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create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
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select * from t1;
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a
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1
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2
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3
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select * from t1;
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a
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1
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2
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3
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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insert delayed into t1 values (4);
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select a from t1;
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a
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1
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2
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3
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4
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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drop table t1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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show global variables like "query_cache_min_res_unit";
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Variable_name Value
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query_cache_min_res_unit 4096
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set GLOBAL query_cache_min_res_unit=1001;
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show global variables like "query_cache_min_res_unit";
|
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Variable_name Value
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query_cache_min_res_unit 1008
|
||
create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
|
||
create table t2 (a int not null);
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||
insert into t2 values (1),(2),(3);
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select * from t1;
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||
a
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||
1
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||
2
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||
3
|
||
select * from t1;
|
||
a
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||
1
|
||
2
|
||
3
|
||
select * from t2;
|
||
a
|
||
1
|
||
2
|
||
3
|
||
select * from t2;
|
||
a
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||
1
|
||
2
|
||
3
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 11
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 2
|
||
drop table t1;
|
||
select a from t2;
|
||
a
|
||
1
|
||
2
|
||
3
|
||
select a from t2;
|
||
a
|
||
1
|
||
2
|
||
3
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 12
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 2
|
||
drop table t2;
|
||
set GLOBAL query_cache_min_res_unit=default;
|
||
show global variables like "query_cache_min_res_unit";
|
||
Variable_name Value
|
||
query_cache_min_res_unit 4096
|
||
create table t1 (a int not null);
|
||
insert into t1 values (1);
|
||
select "aaa" from t1;
|
||
aaa
|
||
aaa
|
||
select "AAA" from t1;
|
||
AAA
|
||
AAA
|
||
drop table t1;
|
||
create table t1 (a int);
|
||
set GLOBAL query_cache_size=1000;
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 0
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=1024;
|
||
Warnings:
|
||
Warning 1282 Query cache failed to set size 1024; new query cache size is 0
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 0
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=10240;
|
||
Warnings:
|
||
Warning 1282 Query cache failed to set size 10240; new query cache size is 0
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 0
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=20480;
|
||
Warnings:
|
||
Warning 1282 Query cache failed to set size 20480; new query cache size is 0
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 0
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=40960;
|
||
Warnings:
|
||
Warning 1282 Query cache failed to set size 40960; new query cache size is 0
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 0
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=51200;
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 51200
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=61440;
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 61440
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=81920;
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 81920
|
||
select * from t1;
|
||
a
|
||
set GLOBAL query_cache_size=102400;
|
||
show global variables like "query_cache_size";
|
||
Variable_name Value
|
||
query_cache_size 102400
|
||
select * from t1;
|
||
a
|
||
drop table t1;
|
||
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
|
||
update t1 set i=(select distinct 1 from (select * from t2) a);
|
||
drop table t1, t2, t3;
|
||
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
|
||
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;
|
||
ERROR 42S02: Table 'test.t1' doesn't exist
|
||
drop table t2;
|
||
select * from t1 where id=2;
|
||
ERROR 42S02: Table 'test.t1' doesn't exist
|
||
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 'TEST_DIR/std_data/words.dat' into table t1;
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
select count(*) from t1;
|
||
count(*)
|
||
70
|
||
drop table 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_cache.out.file";
|
||
select * from t1 into outfile "query_cache.out.file";
|
||
ERROR HY000: File 'query_cache.out.file' already exists
|
||
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;
|
||
create table t1 (a int);
|
||
insert into t1 values (1),(2);
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
select * from t1;
|
||
a
|
||
1
|
||
2
|
||
SET OPTION SQL_SELECT_LIMIT=1;
|
||
select * from t1;
|
||
a
|
||
1
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 2
|
||
SET OPTION SQL_SELECT_LIMIT=DEFAULT;
|
||
drop table t1;
|
||
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);
|
||
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;
|
||
delete from t4 where a=1;
|
||
flush query cache;
|
||
drop table t1,t2,t3,t4;
|
||
set query_cache_wlock_invalidate=1;
|
||
create table t1 (a int not null);
|
||
create table t2 (a int not null);
|
||
select * from t1;
|
||
a
|
||
select * from t2;
|
||
a
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 2
|
||
lock table t1 write, t2 read;
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 1
|
||
unlock table;
|
||
drop table t1,t2;
|
||
set query_cache_wlock_invalidate=default;
|
||
CREATE TABLE t1 (id INT PRIMARY KEY);
|
||
insert into t1 values (1),(2),(3);
|
||
select * from t1;
|
||
id
|
||
1
|
||
2
|
||
3
|
||
create temporary table t1 (a int not null auto_increment
|
||
primary key);
|
||
select * from t1;
|
||
a
|
||
drop table t1;
|
||
drop table t1;
|
||
SET NAMES koi8r;
|
||
CREATE TABLE t1 (a char(1) character set koi8r);
|
||
INSERT INTO t1 VALUES (_koi8r'<27>'),(_koi8r'<27>');
|
||
SELECT a,'<27>','<27>'='<27>' FROM t1;
|
||
a <09> '<27>'='<27>'
|
||
<EFBFBD> <09> 1
|
||
<EFBFBD> <09> 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 1
|
||
set collation_connection=koi8r_bin;
|
||
SELECT a,'<27>','<27>'='<27>' FROM t1;
|
||
a <09> '<27>'='<27>'
|
||
<EFBFBD> <09> 0
|
||
<EFBFBD> <09> 0
|
||
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
|
||
set character_set_client=cp1251;
|
||
SELECT a,'<27>','<27>'='<27>' FROM t1;
|
||
a <09> '<27>'='<27>'
|
||
<EFBFBD> <09> 0
|
||
<EFBFBD> <09> 0
|
||
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 3
|
||
set character_set_results=cp1251;
|
||
SELECT a,'<27>','<27>'='<27>' FROM t1;
|
||
a <09> '<27>'='<27>'
|
||
<EFBFBD> <09> 0
|
||
<EFBFBD> <09> 0
|
||
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 4
|
||
SET NAMES default;
|
||
DROP TABLE t1;
|
||
CREATE TABLE t1 (a int(1));
|
||
CREATE DATABASE mysqltest;
|
||
USE mysqltest;
|
||
DROP DATABASE mysqltest;
|
||
SELECT * FROM test.t1;
|
||
a
|
||
USE test;
|
||
DROP TABLE t1;
|
||
set character_set_results=null;
|
||
select @@character_set_results;
|
||
@@character_set_results
|
||
NULL
|
||
set character_set_results=default;
|
||
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;
|
||
c
|
||
xxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxw
|
||
xxxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxy
|
||
reset query cache;
|
||
set max_sort_length=20;
|
||
select c from t1 order by c, id;
|
||
c
|
||
xxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxw
|
||
xxxxxxxxxxxxxxxxxxxxxxxxy
|
||
set max_sort_length=200;
|
||
select c from t1 order by c, id;
|
||
c
|
||
xxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxw
|
||
xxxxxxxxxxxxxxxxxxxxxxxxx
|
||
xxxxxxxxxxxxxxxxxxxxxxxxy
|
||
set max_sort_length=default;
|
||
select '1' || '3' from t1;
|
||
'1' || '3'
|
||
1
|
||
1
|
||
1
|
||
1
|
||
set SQL_MODE=oracle;
|
||
select '1' || '3' from t1;
|
||
'1' || '3'
|
||
13
|
||
13
|
||
13
|
||
13
|
||
set SQL_MODE=default;
|
||
drop table t1;
|
||
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;
|
||
group_concat(a)
|
||
1234567890
|
||
Warnings:
|
||
Warning 1260 1 line(s) were cut by GROUP_CONCAT()
|
||
set group_concat_max_len=1024;
|
||
select group_concat(a) FROM t1 group by b;
|
||
group_concat(a)
|
||
12345678901234567890
|
||
set group_concat_max_len=default;
|
||
drop table t1;
|
||
create table t1 (a int);
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
show status like "Qcache_inserts";
|
||
Variable_name Value
|
||
Qcache_inserts 18
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 6
|
||
/**/ select * from t1;
|
||
a
|
||
/**/ select * from t1;
|
||
a
|
||
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 19
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 7
|
||
DROP TABLE t1;
|
||
SET GLOBAL query_cache_size=0;
|
||
SET SESSION query_cache_type = 2;
|
||
create table t1(a int);
|
||
select table_name from information_schema.tables
|
||
where table_schema="test";
|
||
table_name
|
||
t1
|
||
drop table t1;
|
||
select table_name from information_schema.tables
|
||
where table_schema="test";
|
||
table_name
|
||
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;
|
||
a
|
||
1
|
||
select a from t1;
|
||
a
|
||
1
|
||
show status like 'qcache_queries_in_cache';
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 1
|
||
repair table t1;
|
||
Table Op Msg_type Msg_text
|
||
test.t1 repair status OK
|
||
show status like 'qcache_queries_in_cache';
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
drop table t1;
|
||
set GLOBAL query_cache_size=64*1024;
|
||
create table t1 (a text);
|
||
insert into t1 values (repeat('abcdefghijklmnopqrstuvwxyz', 550));
|
||
create table t2 (a text);
|
||
insert into t2 values (repeat('ijklmnopqrstuvwxyzabcdefgh', 550));
|
||
select a from t1;
|
||
select a from t2;
|
||
show status like 'Qcache_%_blocks';
|
||
Variable_name Value
|
||
Qcache_free_blocks 1
|
||
Qcache_total_blocks 7
|
||
insert into t1 select reverse(a) from t1;
|
||
show status like 'Qcache_%_blocks';
|
||
Variable_name Value
|
||
Qcache_free_blocks 2
|
||
Qcache_total_blocks 5
|
||
select a from t1;
|
||
show status like 'Qcache_%_blocks';
|
||
Variable_name Value
|
||
Qcache_free_blocks 1
|
||
Qcache_total_blocks 8
|
||
select a from t1;
|
||
a
|
||
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zyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvutsrqponmlkjihgfedcbazyxwvuts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|
||
flush query cache;
|
||
drop table t1, t2;
|
||
set GLOBAL query_cache_size=1355776;
|
||
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';
|
||
COUNT(*)
|
||
0
|
||
Warnings:
|
||
Warning 1292 Incorrect datetime value: '20050327 invalid' for column 'date' at row 1
|
||
Warning 1292 Incorrect datetime value: '20050327 invalid' for column 'date' at row 1
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050327 invalid'
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050327 invalid'
|
||
SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 invalid';
|
||
COUNT(*)
|
||
0
|
||
Warnings:
|
||
Warning 1292 Incorrect datetime value: '20050328 invalid' for column 'date' at row 1
|
||
Warning 1292 Incorrect datetime value: '20050328 invalid' for column 'date' at row 1
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050328 invalid'
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050328 invalid'
|
||
SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 invalid';
|
||
COUNT(*)
|
||
0
|
||
Warnings:
|
||
Warning 1292 Incorrect datetime value: '20050327 invalid' for column 'date' at row 1
|
||
Warning 1292 Incorrect datetime value: '20050327 invalid' for column 'date' at row 1
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050327 invalid'
|
||
Warning 1292 Truncated incorrect INTEGER value: '20050327 invalid'
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
show status like "Qcache_inserts";
|
||
Variable_name Value
|
||
Qcache_inserts 0
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 0
|
||
drop table t1;
|
||
create table t1 (a int);
|
||
insert into t1 values (1);
|
||
reset query cache;
|
||
flush status;
|
||
select * from (select * from t1) a;
|
||
a
|
||
1
|
||
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 0
|
||
select * from (select * from t1) a;
|
||
a
|
||
1
|
||
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
|
||
insert into t1 values (2);
|
||
show status like "Qcache_queries_in_cache";
|
||
Variable_name Value
|
||
Qcache_queries_in_cache 0
|
||
show status like "Qcache_inserts";
|
||
Variable_name Value
|
||
Qcache_inserts 1
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 1
|
||
select * from (select * from t1) a;
|
||
a
|
||
1
|
||
2
|
||
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 2
|
||
show status like "Qcache_hits";
|
||
Variable_name Value
|
||
Qcache_hits 1
|
||
drop table t1;
|
||
create table t1 (a int);
|
||
flush status;
|
||
(select a from t1) union (select a from t1);
|
||
a
|
||
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 0
|
||
(select a from t1) union (select a from t1);
|
||
a
|
||
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;
|
||
create table t1 (a int);
|
||
insert into t1 values (1),(2);
|
||
drop procedure if exists p1;
|
||
CREATE PROCEDURE `p1`()
|
||
begin
|
||
Declare c1 cursor for select a from t1;
|
||
open c1;
|
||
select * from t1;
|
||
end//
|
||
call p1()//
|
||
a
|
||
1
|
||
2
|
||
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()//
|
||
a f1()
|
||
1 2
|
||
2 2
|
||
drop procedure p1//
|
||
drop function f1//
|
||
drop table t1//
|
||
flush query cache;
|
||
reset query cache;
|
||
flush status;
|
||
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;//
|
||
call f1();
|
||
s1
|
||
s1
|
||
s1
|
||
call f1();
|
||
s1
|
||
s1
|
||
s1
|
||
call f1();
|
||
s1
|
||
s1
|
||
s1
|
||
select sql_cache * from t1;
|
||
s1
|
||
insert into t1 values (1);
|
||
select sql_cache * from t1;
|
||
s1
|
||
1
|
||
call f1();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f1();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
select sql_cache * from t1;
|
||
s1
|
||
1
|
||
flush query cache;
|
||
reset query cache;
|
||
flush status;
|
||
select sql_cache * from t1;
|
||
s1
|
||
1
|
||
select sql_cache * from t1 where s1=1;
|
||
s1
|
||
1
|
||
call f1();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f2();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f3();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f4();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f4();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f3();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
call f2();
|
||
s1
|
||
1
|
||
s1
|
||
1
|
||
select sql_cache * from t1 where s1=1;
|
||
s1
|
||
1
|
||
insert into t1 values (2);
|
||
call f1();
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
select sql_cache * from t1 where s1=1;
|
||
s1
|
||
1
|
||
select sql_cache * from t1;
|
||
s1
|
||
1
|
||
2
|
||
call f1();
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
call f3();
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
call f3();
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
call f1();
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
s1
|
||
1
|
||
2
|
||
drop procedure f1;
|
||
drop procedure f2;
|
||
drop procedure f3;
|
||
drop procedure f4;
|
||
drop table t1;
|
||
set GLOBAL query_cache_size=0;
|
||
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;
|
||
a
|
||
4
|
||
5
|
||
select * from t1 where a > 3;
|
||
a
|
||
4
|
||
5
|
||
show status like 'last_query_cost';
|
||
Variable_name Value
|
||
Last_query_cost 0.000000
|
||
drop table t1;
|
||
SET GLOBAL query_cache_size=0;
|