1
drop table if exists t1;
2
CREATE TABLE t1 (data LONGBLOB) ENGINE=myisam;
3
INSERT INTO t1 (data) VALUES (NULL);
4
UPDATE t1 set data=repeat('a',18*1024*1024);
5
select length(data) from t1;
8
delete from t1 where left(data,1)='a';
10
Table Op Msg_type Msg_text
11
test.t1 check status OK
13
INSERT INTO t1 (data) VALUES (repeat('a',1*1024*1024));
14
INSERT INTO t1 (data) VALUES (repeat('b',16*1024*1024-1024));
15
delete from t1 where left(data,1)='b';
17
Table Op Msg_type Msg_text
18
test.t1 check status OK
19
UPDATE t1 set data=repeat('c',17*1024*1024);
21
Table Op Msg_type Msg_text
22
test.t1 check status OK
23
delete from t1 where left(data,1)='c';
25
Table Op Msg_type Msg_text
26
test.t1 check status OK
27
INSERT INTO t1 set data=repeat('a',18*1024*1024);
28
select length(data) from t1;
31
alter table t1 modify data blob;
32
select length(data) from t1;
36
CREATE TABLE t1 (data BLOB) ENGINE=myisam;
37
INSERT INTO t1 (data) VALUES (NULL);
38
UPDATE t1 set data=repeat('a',18*1024*1024);
39
select length(data) from t1;