DROP TABLE IF EXISTS t1;
select variable_value from information_schema.global_status where variable_name="handler_read_key" into @global_read_key;
show columns from information_schema.client_statistics;
Field	Type	Null	Key	Default	Extra
CLIENT	varchar(64)	NO			
TOTAL_CONNECTIONS	bigint(21)	NO		0	
CONCURRENT_CONNECTIONS	bigint(21)	NO		0	
CONNECTED_TIME	bigint(21)	NO		0	
BUSY_TIME	double	NO		0	
CPU_TIME	double	NO		0	
BYTES_RECEIVED	bigint(21)	NO		0	
BYTES_SENT	bigint(21)	NO		0	
BINLOG_BYTES_WRITTEN	bigint(21)	NO		0	
ROWS_READ	bigint(21)	NO		0	
ROWS_SENT	bigint(21)	NO		0	
ROWS_DELETED	bigint(21)	NO		0	
ROWS_INSERTED	bigint(21)	NO		0	
ROWS_UPDATED	bigint(21)	NO		0	
SELECT_COMMANDS	bigint(21)	NO		0	
UPDATE_COMMANDS	bigint(21)	NO		0	
OTHER_COMMANDS	bigint(21)	NO		0	
COMMIT_TRANSACTIONS	bigint(21)	NO		0	
ROLLBACK_TRANSACTIONS	bigint(21)	NO		0	
DENIED_CONNECTIONS	bigint(21)	NO		0	
LOST_CONNECTIONS	bigint(21)	NO		0	
ACCESS_DENIED	bigint(21)	NO		0	
EMPTY_QUERIES	bigint(21)	NO		0	
show columns from information_schema.user_statistics;
Field	Type	Null	Key	Default	Extra
USER	varchar(128)	NO			
TOTAL_CONNECTIONS	int(11)	NO		0	
CONCURRENT_CONNECTIONS	int(11)	NO		0	
CONNECTED_TIME	int(11)	NO		0	
BUSY_TIME	double	NO		0	
CPU_TIME	double	NO		0	
BYTES_RECEIVED	bigint(21)	NO		0	
BYTES_SENT	bigint(21)	NO		0	
BINLOG_BYTES_WRITTEN	bigint(21)	NO		0	
ROWS_READ	bigint(21)	NO		0	
ROWS_SENT	bigint(21)	NO		0	
ROWS_DELETED	bigint(21)	NO		0	
ROWS_INSERTED	bigint(21)	NO		0	
ROWS_UPDATED	bigint(21)	NO		0	
SELECT_COMMANDS	bigint(21)	NO		0	
UPDATE_COMMANDS	bigint(21)	NO		0	
OTHER_COMMANDS	bigint(21)	NO		0	
COMMIT_TRANSACTIONS	bigint(21)	NO		0	
ROLLBACK_TRANSACTIONS	bigint(21)	NO		0	
DENIED_CONNECTIONS	bigint(21)	NO		0	
LOST_CONNECTIONS	bigint(21)	NO		0	
ACCESS_DENIED	bigint(21)	NO		0	
EMPTY_QUERIES	bigint(21)	NO		0	
show columns from information_schema.index_statistics;
Field	Type	Null	Key	Default	Extra
TABLE_SCHEMA	varchar(192)	NO			
TABLE_NAME	varchar(192)	NO			
INDEX_NAME	varchar(192)	NO			
ROWS_READ	bigint(21)	NO		0	
show columns from information_schema.table_statistics;
Field	Type	Null	Key	Default	Extra
TABLE_SCHEMA	varchar(192)	NO			
TABLE_NAME	varchar(192)	NO			
ROWS_READ	bigint(21)	NO		0	
ROWS_CHANGED	bigint(21)	NO		0	
ROWS_CHANGED_X_INDEXES	bigint(21)	NO		0	
set @save_general_log=@@global.general_log;
set @@global.general_log=0;
set @@global.userstat=1;
flush status;
create table t1 (a int, primary key (a), b int default 0) engine=innodb;
insert into t1 (a) values (1),(2),(3),(4);
update t1 set b=1;
update t1 set b=5 where a=2;
delete from t1 where a=3;
/* Empty query */
select * from t1 where a=999;
a	b
drop table t1;
create table t1 (a int, primary key (a), b int default 0) engine=innodb;
begin;
insert into t1 values(1,1);
commit;
begin;
insert into t1 values(2,2);
commit;
begin;
insert into t1 values(3,3);
rollback;
drop table t1;
select sleep(1);
sleep(1)
0
show status like "rows%";
Variable_name	Value
Rows_read	6
Rows_sent	1
Rows_tmp_read	0
show status like "ha%";
Variable_name	Value
Handler_commit	19
Handler_delete	1
Handler_discover	0
Handler_icp_attempts	0
Handler_icp_match	0
Handler_mrr_init	0
Handler_mrr_key_refills	0
Handler_mrr_rowid_refills	0
Handler_prepare	18
Handler_read_first	0
Handler_read_key	3
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_deleted	0
Handler_read_rnd_next	5
Handler_rollback	2
Handler_savepoint	0
Handler_savepoint_rollback	0
Handler_tmp_update	0
Handler_tmp_write	0
Handler_update	5
Handler_write	7
select variable_value - @global_read_key as "handler_read_key" from information_schema.global_status where variable_name="handler_read_key";
handler_read_key
3
set @@global.userstat=0;
select * from information_schema.index_statistics;
TABLE_SCHEMA	TABLE_NAME	INDEX_NAME	ROWS_READ
test	t1	PRIMARY	2
select * from information_schema.table_statistics;
TABLE_SCHEMA	TABLE_NAME	ROWS_READ	ROWS_CHANGED	ROWS_CHANGED_X_INDEXES
test	t1	6	13	13
show table_statistics;
Table_schema	Table_name	Rows_read	Rows_changed	Rows_changed_x_#indexes
test	t1	6	13	13
show index_statistics;
Table_schema	Table_name	Index_name	Rows_read
test	t1	PRIMARY	2
select TOTAL_CONNECTIONS, CONCURRENT_CONNECTIONS, ROWS_READ, ROWS_SENT, ROWS_DELETED, ROWS_INSERTED, ROWS_UPDATED, SELECT_COMMANDS, UPDATE_COMMANDS, OTHER_COMMANDS, COMMIT_TRANSACTIONS, ROLLBACK_TRANSACTIONS, DENIED_CONNECTIONS, LOST_CONNECTIONS, ACCESS_DENIED, EMPTY_QUERIES from information_schema.client_statistics;;
TOTAL_CONNECTIONS	1
CONCURRENT_CONNECTIONS	0
ROWS_READ	6
ROWS_SENT	2
ROWS_DELETED	1
ROWS_INSERTED	7
ROWS_UPDATED	5
SELECT_COMMANDS	3
UPDATE_COMMANDS	11
OTHER_COMMANDS	7
COMMIT_TRANSACTIONS	19
ROLLBACK_TRANSACTIONS	2
DENIED_CONNECTIONS	0
LOST_CONNECTIONS	0
ACCESS_DENIED	0
EMPTY_QUERIES	1
select TOTAL_CONNECTIONS, CONCURRENT_CONNECTIONS, ROWS_READ, ROWS_SENT, ROWS_DELETED, ROWS_INSERTED, ROWS_UPDATED, SELECT_COMMANDS, UPDATE_COMMANDS, OTHER_COMMANDS, COMMIT_TRANSACTIONS, ROLLBACK_TRANSACTIONS, DENIED_CONNECTIONS, LOST_CONNECTIONS, ACCESS_DENIED, EMPTY_QUERIES from information_schema.user_statistics;;
TOTAL_CONNECTIONS	1
CONCURRENT_CONNECTIONS	0
ROWS_READ	6
ROWS_SENT	2
ROWS_DELETED	1
ROWS_INSERTED	7
ROWS_UPDATED	5
SELECT_COMMANDS	3
UPDATE_COMMANDS	11
OTHER_COMMANDS	7
COMMIT_TRANSACTIONS	19
ROLLBACK_TRANSACTIONS	2
DENIED_CONNECTIONS	0
LOST_CONNECTIONS	0
ACCESS_DENIED	0
EMPTY_QUERIES	1
flush table_statistics;
flush index_statistics;
select * from information_schema.index_statistics;
TABLE_SCHEMA	TABLE_NAME	INDEX_NAME	ROWS_READ
select * from information_schema.table_statistics;
TABLE_SCHEMA	TABLE_NAME	ROWS_READ	ROWS_CHANGED	ROWS_CHANGED_X_INDEXES
show status like "%statistics%";
Variable_name	Value
Com_show_client_statistics	0
Com_show_index_statistics	1
Com_show_table_statistics	1
Com_show_user_statistics	0
select connected_time <> 0, busy_time <> 0, bytes_received <> 0,
bytes_sent <> 0, binlog_bytes_written <> 0
from information_schema.user_statistics;
connected_time <> 0	busy_time <> 0	bytes_received <> 0	bytes_sent <> 0	binlog_bytes_written <> 0
1	1	1	1	1
select connected_time <> 0, busy_time <> 0, bytes_received <> 0,
bytes_sent <> 0, binlog_bytes_written <> 0
from information_schema.client_statistics;
connected_time <> 0	busy_time <> 0	bytes_received <> 0	bytes_sent <> 0	binlog_bytes_written <> 0
1	1	1	1	1
create table t1 (a int) engine=innodb;
select @@in_transaction;
@@in_transaction
0
begin;
select @@in_transaction;
@@in_transaction
1
insert into t1 values (1);
select @@in_transaction;
@@in_transaction
1
commit;
select @@in_transaction;
@@in_transaction
0
set @@autocommit=0;
select @@in_transaction;
@@in_transaction
0
insert into t1 values (2);
select @@in_transaction;
@@in_transaction
1
set @@autocommit=1;
select @@in_transaction;
@@in_transaction
0
drop table t1;
set @@global.general_log=@save_general_log;
