137 lines
9.7 KiB
Plaintext
137 lines
9.7 KiB
Plaintext
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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CREATE TABLE test.t_before(a INT);
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INSERT INTO test.t_before VALUES (1);
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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test t_before
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RENAME TABLE test.t_before TO test.t_after;
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SELECT COUNT(*) FROM test.t_after;
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COUNT(*)
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1
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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test t_after
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DROP TABLE test.t_after;
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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CREATE TABLE test.t1(a INT);
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INSERT INTO test.t1 VALUES (1);
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CREATE VIEW test.v1 AS SELECT * FROM test.t1;
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SELECT COUNT(*) FROM test.v1;
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COUNT(*)
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1
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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test t1
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DROP VIEW test.v1;
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DROP TABLE test.t1;
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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SELECT EVENT_ID FROM performance_schema.events_waits_current
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WHERE THREAD_ID IN
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(SELECT THREAD_ID FROM performance_schema.threads)
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AND EVENT_NAME IN
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(SELECT NAME FROM performance_schema.setup_instruments
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WHERE NAME LIKE "wait/synch/%")
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LIMIT 1;
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create table test.t1(a int) engine=performance_schema;
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ERROR HY000: Invalid performance_schema usage.
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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create table test.t1 like performance_schema.events_waits_current;
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ERROR HY000: Invalid performance_schema usage.
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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create table performance_schema.t1(a int);
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ERROR 42000: CREATE command denied to user 'root'@'localhost' for table 't1'
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SELECT object_schema, object_name FROM performance_schema.objects_summary_global_by_type
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WHERE object_schema='test';
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object_schema object_name
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drop table if exists test.ghost;
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create table test.ghost (a int, b int);
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alter table test.ghost add index index_a(a);
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alter table test.ghost add index index_b(b);
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insert into test.ghost values (1, 3);
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insert into test.ghost values (2, 4);
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select * from test.ghost;
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a b
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1 3
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2 4
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drop table test.ghost;
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select * from performance_schema.file_instances
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where file_name like "%ghost%";
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FILE_NAME EVENT_NAME OPEN_COUNT
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select * from performance_schema.no_such_table;
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ERROR 42S02: Table 'performance_schema.no_such_table' doesn't exist
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DROP TABLE IF EXISTS t_60905;
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CREATE TABLE t_60905 (i INT, j INT, KEY(i)) ENGINE = InnoDB;
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INSERT INTO t_60905 VALUES
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(1,2), (3,4), (5,6), (7,8), (9,10);
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DELETE FROM t_60905 WHERE i = 1;
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DELETE FROM t_60905 WHERE j = 8;
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SELECT object_schema,
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object_name,
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index_name,
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count_fetch,
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count_insert,
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count_update,
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count_delete
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FROM performance_schema.table_io_waits_summary_by_index_usage
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WHERE object_schema = 'test'
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AND object_name = 't_60905';
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object_schema object_name index_name count_fetch count_insert count_update count_delete
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test t_60905 i 2 0 0 1
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test t_60905 NULL 5 5 0 1
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DROP TABLE t_60905;
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show global variables like "performance_schema_max_thread_instances";
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Variable_name Value
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performance_schema_max_thread_instances 200
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explain select * from performance_schema.threads;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE threads NULL ALL NULL NULL NULL NULL 256 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID` from `performance_schema`.`threads`
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use performance_schema;
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show events;
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Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
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show events from performance_schema;
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Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
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show events where Db= 'performance_schema';
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Db Name Definer Time zone Type Execute at Interval value Interval field Starts Ends Status Originator character_set_client collation_connection Database Collation
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use test;
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use test;
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truncate performance_schema.events_statements_history;
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truncate performance_schema.events_statements_history_long;
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select * from t1;
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ERROR 42S02: Table 'test.t1' doesn't exist
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select mysql_errno, returned_sqlstate, message_text, errors, warnings
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from performance_schema.events_statements_history where errors > 0;
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mysql_errno returned_sqlstate message_text errors warnings
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1146 42S02 Table 'test.t1' doesn't exist 1 0
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select mysql_errno, returned_sqlstate, message_text, errors, warnings from
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performance_schema.events_statements_history_long where errors > 0;
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mysql_errno returned_sqlstate message_text errors warnings
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1146 42S02 Table 'test.t1' doesn't exist 1 0
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use performance_schema;
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truncate performance_schema.events_statements_history;
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select 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' AS A;
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A
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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select _utf8mb4 'ваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑваÑÑ' as B;
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B
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вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>вас<EFBFBD>
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select count(*) from events_statements_history where sql_text like "%...";
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count(*)
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2
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