mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +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
59 lines
1.9 KiB
Text
59 lines
1.9 KiB
Text
--- ./mysql-test/main/alter_table.result 2020-02-27 19:35:41.279992329 +0300
|
|
+++ ./mysql-test/main/alter_table,heap.reject 2020-02-27 19:39:44.175998039 +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;
|
|
@@ -2774,36 +2772,6 @@
|
|
ERROR 42S22: Unknown column 'd' in 'field list'
|
|
DROP TRIGGER trg1;
|
|
DROP PROCEDURE sp1;
|
|
-CREATE TABLE t_gen(a INT, b DOUBLE GENERATED ALWAYS AS (SQRT(a)));
|
|
-INSERT INTO t_gen(a) VALUES(4);
|
|
-SELECT * FROM t_gen;
|
|
-a b
|
|
-4 2
|
|
-SHOW CREATE TABLE t_gen;
|
|
-Table Create Table
|
|
-t_gen CREATE TABLE `t_gen` (
|
|
- `a` int(11) DEFAULT NULL,
|
|
- `b` double GENERATED ALWAYS AS (sqrt(`a`)) VIRTUAL
|
|
-) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1
|
|
-ALTER TABLE t_gen RENAME COLUMN a TO c, CHANGE COLUMN b b DOUBLE GENERATED ALWAYS AS (SQRT(c));
|
|
-SELECT * FROM t_gen;
|
|
-c b
|
|
-4 2
|
|
-SHOW CREATE TABLE t_gen;
|
|
-Table Create Table
|
|
-t_gen CREATE TABLE `t_gen` (
|
|
- `c` int(11) DEFAULT NULL,
|
|
- `b` double GENERATED ALWAYS AS (sqrt(`c`)) VIRTUAL
|
|
-) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1
|
|
-ALTER TABLE t_gen CHANGE COLUMN c x INT;
|
|
-show create table t_gen;
|
|
-Table Create Table
|
|
-t_gen CREATE TABLE `t_gen` (
|
|
- `x` int(11) DEFAULT NULL,
|
|
- `b` double GENERATED ALWAYS AS (sqrt(`x`)) VIRTUAL
|
|
-) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1
|
|
-ALTER TABLE t_gen RENAME COLUMN x TO a;
|
|
-DROP TABLE t_gen;
|
|
SHOW CREATE TABLE t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|