45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
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drop table if exists t1;
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CREATE TABLE t1 (data LONGBLOB) ENGINE=myisam;
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INSERT INTO t1 (data) VALUES (NULL);
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UPDATE t1 set data=repeat('a',18*1024*1024);
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select length(data) from t1;
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length(data)
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18874368
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delete from t1 where left(data,1)='a';
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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truncate table t1;
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INSERT INTO t1 (data) VALUES (repeat('a',1*1024*1024));
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INSERT INTO t1 (data) VALUES (repeat('b',16*1024*1024-1024));
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delete from t1 where left(data,1)='b';
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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UPDATE t1 set data=repeat('c',17*1024*1024);
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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delete from t1 where left(data,1)='c';
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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INSERT INTO t1 set data=repeat('a',18*1024*1024);
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select length(data) from t1;
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length(data)
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18874368
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alter table t1 modify data blob;
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select length(data) from t1;
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length(data)
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0
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drop table t1;
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CREATE TABLE t1 (data BLOB) ENGINE=myisam;
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INSERT INTO t1 (data) VALUES (NULL);
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UPDATE t1 set data=repeat('a',18*1024*1024);
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Warnings:
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Warning 1265 Data truncated for column 'data' at row 1
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select length(data) from t1;
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length(data)
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65535
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drop table t1;
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