Details
-
Bug
-
Status: Open (View Workflow)
-
Trivial
-
Resolution: Unresolved
-
10.4(EOL), 10.5, 10.6, 10.10(EOL), 10.11, 11.0(EOL), 11.1(EOL), 11.2(EOL)
-
None
Description
ALTER TABLE .. ALTER .. SET DEFAULT allows to set a default value for a virtual column, which doesn't make sense. It is not further reflected in SHOW CREATE TABLE because there is no such syntax, but it is shown in INFORMATION_SCHEMA, which can be misleading (and is inconsistent).
create table t (a int, b int as (a)); |
alter table t alter b set default 1; |
show create table t; |
select column_name, column_default from information_schema.columns where table_name = 't'; |
drop table t; |
|
11.2 9ad7c899 |
alter table t alter b set default 1; |
show create table t; |
Table Create Table |
t CREATE TABLE `t` ( |
`a` int(11) DEFAULT NULL, |
`b` int(11) GENERATED ALWAYS AS (`a`) VIRTUAL |
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci |
select column_name, column_default from information_schema.columns where table_name = 't'; |
column_name column_default
|
a NULL |
b 1
|