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MDEV-18352 Add a regression test for VARCHAR enlarging

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Add a simplest regression test. Specifically, I want to be sure that
SYS_COLUMNS.LEN is increased.

Closes #1123
This commit is contained in:
Marko Mäkelä 2019-01-25 12:46:23 +02:00
parent fab531a150
commit d97db40a9f
2 changed files with 17 additions and 0 deletions
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9
mysql-test/suite/innodb/r/instant_varchar_enlarge.result Normal file
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create table t (a varchar(100)) engine=innodb;
select name, pos, mtype, prtype, len from information_schema.innodb_sys_columns where name='a';
name pos mtype prtype len
a 0 1 524303 100
alter table t modify a varchar(110), algorithm=inplace;
select name, pos, mtype, prtype, len from information_schema.innodb_sys_columns where name='a';
name pos mtype prtype len
a 0 1 524303 110
drop table t;

8
mysql-test/suite/innodb/t/instant_varchar_enlarge.test Normal file
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--source include/have_innodb.inc
# LEN must increase here
create table t (a varchar(100)) engine=innodb;
select name, pos, mtype, prtype, len from information_schema.innodb_sys_columns where name='a';
alter table t modify a varchar(110), algorithm=inplace;
select name, pos, mtype, prtype, len from information_schema.innodb_sys_columns where name='a';
drop table t;