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MDEV-9319 ALTER from a bigger to a smaller blob type truncates too much data

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This commit is contained in:
Alexander Barkov
2015-12-29 14:17:31 +04:00
parent e126baafbc
commit e1b9be5417
10 changed files with 152 additions and 14 deletions
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4
mysql-test/r/myisam-blob.result
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@@ -29,9 +29,11 @@ select length(data) from t1;
length(data)
18874368
alter table t1 modify data blob;
Warnings:
Warning 1265 Data truncated for column 'data' at row 1
select length(data) from t1;
length(data)
0
65535
drop table t1;
CREATE TABLE t1 (data BLOB) ENGINE=myisam;
INSERT INTO t1 (data) VALUES (NULL);