myisam-blob.test
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上传日期:2022-05-23
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- #
- # Test bugs in the MyISAM code with blobs
- #
- --disable_warnings
- drop table if exists t1;
- --enable_warnings
- # Bug #2159 (Problem with update of blob to > 16M)
- CREATE TABLE t1 (data LONGBLOB) ENGINE=myisam;
- INSERT INTO t1 (data) VALUES (NULL);
- UPDATE t1 set data=repeat('a',18*1024*1024);
- select length(data) from t1;
- delete from t1 where left(data,1)='a';
- check table t1;
- truncate table t1;
- INSERT INTO t1 (data) VALUES (repeat('a',1*1024*1024));
- INSERT INTO t1 (data) VALUES (repeat('b',16*1024*1024-1024));
- delete from t1 where left(data,1)='b';
- check table t1;
- # now we have two blocks in the table, first is a 1M record and second is
- # a 16M delete block.
- UPDATE t1 set data=repeat('c',17*1024*1024);
- check table t1;
- delete from t1 where left(data,1)='c';
- check table t1;
- INSERT INTO t1 set data=repeat('a',18*1024*1024);
- select length(data) from t1;
- alter table t1 modify data blob;
- select length(data) from t1;
- drop table t1;
- CREATE TABLE t1 (data BLOB) ENGINE=myisam;
- INSERT INTO t1 (data) VALUES (NULL);
- UPDATE t1 set data=repeat('a',18*1024*1024);
- select length(data) from t1;
- drop table t1;
- # End of 4.1 tests