|
1
by brian
clean slate |
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;
|
|
6 |
length(data)
|
|
7 |
18874368
|
|
8 |
delete from t1 where left(data,1)='a';
|
|
9 |
check table t1;
|
|
10 |
Table Op Msg_type Msg_text
|
|
11 |
test.t1 check status OK
|
|
12 |
truncate table t1;
|
|
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';
|
|
16 |
check table t1;
|
|
17 |
Table Op Msg_type Msg_text
|
|
18 |
test.t1 check status OK
|
|
19 |
UPDATE t1 set data=repeat('c',17*1024*1024);
|
|
20 |
check table t1;
|
|
21 |
Table Op Msg_type Msg_text
|
|
22 |
test.t1 check status OK
|
|
23 |
delete from t1 where left(data,1)='c';
|
|
24 |
check table t1;
|
|
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;
|
|
29 |
length(data)
|
|
30 |
18874368
|
|
31 |
alter table t1 modify data blob;
|
|
32 |
select length(data) from t1;
|
|
33 |
length(data)
|
|
34 |
0
|
|
35 |
drop table 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 |
Warnings:
|
|
40 |
Warning 1265 Data truncated for column 'data' at row 1
|
|
41 |
select length(data) from t1;
|
|
42 |
length(data)
|
|
43 |
65535
|
|
44 |
drop table t1;
|