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https://github.com/MariaDB/server.git
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3b617acb87
Added global status variable 'Queries' which represents total amount of queries executed by server including statements executed by SPs. note: It's old behaviour of 'Questions' variable. mysql-test/r/status.result: test result mysql-test/t/status.test: test case sql/mysqld.cc: Added global status variable 'Queries' which represents total amount of queries executed by server including statements executed by SPs. note: It's old behaviour of 'Questions' variable. sql/sql_show.cc: Added global status variable 'Queries' which represents total amount of queries executed by server including statements executed by SPs. note: It's old behaviour of 'Questions' variable. sql/structs.h: Added global status variable 'Queries' which represents total amount of queries executed by server including statements executed by SPs. note: It's old behaviour of 'Questions' variable.
118 lines
2.7 KiB
Text
118 lines
2.7 KiB
Text
flush status;
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show status like 'Table_lock%';
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Variable_name Value
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Table_locks_immediate 0
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Table_locks_waited 0
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SET SQL_LOG_BIN=0;
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drop table if exists t1;
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create table t1(n int) engine=myisam;
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insert into t1 values(1);
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lock tables t1 read;
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unlock tables;
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lock tables t1 read;
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update t1 set n = 3;
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unlock tables;
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show status like 'Table_lock%';
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Variable_name Value
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Table_locks_immediate 3
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Table_locks_waited 1
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drop table t1;
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select 1;
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1
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1
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show status like 'last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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FLUSH STATUS;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 1
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SET @save_thread_cache_size=@@thread_cache_size;
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SET GLOBAL thread_cache_size=3;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 3
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FLUSH STATUS;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 2
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 3
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 4
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SET GLOBAL thread_cache_size=@save_thread_cache_size;
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CREATE TABLE t1 ( a INT );
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INSERT INTO t1 VALUES (1), (2);
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SELECT a FROM t1 LIMIT 1;
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a
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 2.402418
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EXPLAIN SELECT a FROM t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 2.402418
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SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
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a
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1
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2
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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2 UNION t1 ALL NULL NULL NULL NULL 2
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL Using filesort
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
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a IN (SELECT a FROM t1)
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
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x
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1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 0.000000
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SELECT * FROM t1 a, t1 b LIMIT 1;
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a a
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1 1
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SHOW SESSION STATUS LIKE 'Last_query_cost';
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Variable_name Value
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Last_query_cost 4.805836
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DROP TABLE t1;
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DROP PROCEDURE IF EXISTS p1;
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DROP FUNCTION IF EXISTS f1;
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CREATE FUNCTION f1() RETURNS INTEGER
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BEGIN
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DECLARE foo INTEGER;
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DECLARE bar INTEGER;
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SET foo=1;
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SET bar=2;
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RETURN foo;
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END $$
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CREATE PROCEDURE p1()
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BEGIN
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SELECT 1;
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END $$
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SELECT f1();
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f1()
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1
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CALL p1();
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1
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1
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SELECT 9;
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9
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9
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DROP PROCEDURE p1;
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DROP FUNCTION f1;
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