database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

MDEV-7318 RENAME INDEX

Browse Source 
This patch adds support of RENAME INDEX operation to the ALTER TABLE
statement. Code which determines if ALTER TABLE can be done in-place
for "simple" storage engines like MyISAM, Heap and etc. was updated to
handle ALTER TABLE ... RENAME INDEX as an in-place operation. Support
for in-place ALTER TABLE ... RENAME INDEX for InnoDB was covered by
MDEV-13301.

Syntax changes
==============

A new type of <alter_specification> is added:

<rename index clause> ::= RENAME ( INDEX | KEY ) <oldname> TO <newname>

Where <oldname> and <newname> are identifiers for old name and new
name of the index.

Semantic changes
================

The result of "ALTER TABLE t1 RENAME INDEX a TO b" is a table which
contents and structure are identical to the old version of 't1' with
the only exception index 'a' being called 'b'.

Neither <oldname> nor <newname> can be "primary". The index being
renamed should exist and its new name should not be occupied
by another index on the same table.

Related to: WL#6555, MDEV-13301
This commit is contained in:
Aleksey Midenkov
2020-03-03 13:50:33 +03:00
parent fa8ad75439
commit 193725b81e
13 changed files with 2204 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
sql/sql_class.h
View File

@ -355,6 +355,21 @@ public:
};
class Alter_rename_key : public Sql_alloc
{
public:
LEX_CSTRING old_name;
LEX_CSTRING new_name;
Alter_rename_key(LEX_CSTRING old_name_arg, LEX_CSTRING new_name_arg)
: old_name(old_name_arg), new_name(new_name_arg) {}
Alter_rename_key *clone(MEM_ROOT *mem_root) const
{ return new (mem_root) Alter_rename_key(*this); }
};
class Key :public Sql_alloc, public DDL_options {
public:
enum Keytype { PRIMARY, UNIQUE, MULTIPLE, FULLTEXT, SPATIAL, FOREIGN_KEY};