select @@encrypt_tmp_files;
@@encrypt_tmp_files
1
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2);
DELETE FROM t1 WHERE a=1;
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
create table t1 (v varchar(10), c char(10), t text, key(v), key(c), key(t(10)));
insert into t1 (v) select concat(char(ascii('a')+s2.seq),repeat(' ',s1.seq))
from seq_0_to_9 as s1, seq_0_to_26 as s2;
update t1 set c=v, t=v;
select sql_big_result t,count(t) from t1 group by t limit 10;
t	count(t)
a	10
b	10
c	10
d	10
e	10
f	10
g	10
h	10
i	10
j	10
drop table t1;
reset master;
set @save_binlog_cache_size=@@global.binlog_cache_size;
set global binlog_cache_size=8192;
connect con1, localhost, root;
create table t1 (a text) engine=innodb;
start transaction;
insert t1 select repeat(seq, 1000) from seq_1_to_15;
commit;
start transaction;
insert t1 select repeat(seq, 1000) from seq_1_to_8;
commit;
disconnect con1;
connect con2, localhost, root;
create table t2 (a text) engine=innodb;
start transaction;
insert t2 select repeat(seq, 1000) from seq_1_to_15;
savepoint foo;
insert t2 select repeat(seq, 1000) from seq_16_to_30;
rollback to savepoint foo;
insert t2 select repeat(seq, 1000) from seq_31_to_40;
commit;
disconnect con2;
connection default;
flush binary logs;
drop table t1, t2;
set @@global.binlog_cache_size=@save_binlog_cache_size;
select left(a, 10) from t1;
left(a, 10)
1111111111
2222222222
3333333333
4444444444
5555555555
6666666666
7777777777
8888888888
9999999999
1010101010
1111111111
1212121212
1313131313
1414141414
1515151515
1111111111
2222222222
3333333333
4444444444
5555555555
6666666666
7777777777
8888888888
select left(a, 10) from t2;
left(a, 10)
1111111111
2222222222
3333333333
4444444444
5555555555
6666666666
7777777777
8888888888
9999999999
1010101010
1111111111
1212121212
1313131313
1414141414
1515151515
3131313131
3232323232
3333333333
3434343434
3535353535
3636363636
3737373737
3838383838
3939393939
4040404040
drop table t1, t2;