mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 18:41:56 +01:00
fa8ad75439
The existing syntax for renaming a column uses "ALTER TABLE ... CHANGE"
command. This requires full column specification to rename the column.
This patch adds new syntax "ALTER TABLE ... RENAME COLUMN", which do not
expect users to provide full column specification. It means that the new
syntax would pick in-place or copy algorithm in the same way as that of
existing "ALTER TABLE ... CHANGE" command. The existing syntax
"ALTER TABLE ... CHANGE" will continue to work.
Syntax changes
==============
ALTER TABLE tbl_name
[alter_specification [, alter_specification] ...]
[partition_options]
Following is a new <alter_specification> added:
| RENAME COLUMN <oldname> TO <newname>
Where <oldname> and <newname> are identifiers for old name and new
name of the column.
Related to: WL#10761
22 lines
813 B
Text
22 lines
813 B
Text
--- ./mysql-test/main/alter_table.result 2020-02-27 19:35:41.279992329 +0300
|
|
+++ ./mysql-test/main/alter_table,aria.reject 2020-02-27 19:37:13.251994491 +0300
|
|
@@ -2716,8 +2716,7 @@
|
|
t3 CREATE TABLE `t3` (
|
|
`a` int(11) DEFAULT NULL,
|
|
`b` int(11) DEFAULT NULL,
|
|
- KEY `b` (`b`),
|
|
- CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
|
|
+ KEY `b` (`b`)
|
|
) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1
|
|
ALTER TABLE t1 RENAME COLUMN bb TO b;
|
|
SHOW CREATE TABLE t1;
|
|
@@ -2733,8 +2732,7 @@
|
|
t3 CREATE TABLE `t3` (
|
|
`a` int(11) DEFAULT NULL,
|
|
`c` int(11) DEFAULT NULL,
|
|
- KEY `b` (`c`),
|
|
- CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
|
|
+ KEY `b` (`c`)
|
|
) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1
|
|
CREATE TABLE t4(a int);
|
|
ALTER TABLE t4 RENAME COLUMN a TO aa, ALGORITHM = INPLACE;
|