1 -- The Great Restructuring of October 2004
2 -- Creates 'page', 'revision' tables and transforms the classic
3 -- cur+old into a separate page+revision+text structure.
5 -- The pre-conversion 'old' table is renamed to 'text' and used
6 -- without internal restructuring to avoid rebuilding the entire
7 -- table. (This can be done separately if desired.)
9 -- The pre-conversion 'cur' table is now redundant and can be
10 -- discarded when done.
12 CREATE TABLE /*$wgDBprefix*/page (
13 page_id
int(8) unsigned
NOT NULL auto_increment
,
14 page_namespace tinyint
NOT NULL,
15 page_title
varchar(255) binary NOT NULL,
16 page_restrictions tinyblob
NOT NULL default '',
17 page_counter
bigint(20) unsigned
NOT NULL default '0',
18 page_is_redirect
tinyint(1) unsigned
NOT NULL default '0',
19 page_is_new
tinyint(1) unsigned
NOT NULL default '0',
20 page_random
real unsigned
NOT NULL,
21 page_touched
char(14) binary NOT NULL default '',
22 page_latest
int(8) unsigned
NOT NULL,
24 PRIMARY KEY page_id (page_id
),
25 UNIQUE INDEX name_title (page_namespace
,page_title
),
29 CREATE TABLE /*$wgDBprefix*/revision (
30 rev_id
int(8) unsigned
NOT NULL auto_increment
,
31 rev_page
int(8) unsigned
NOT NULL,
32 rev_comment tinyblob
NOT NULL default '',
33 rev_user
int(5) unsigned
NOT NULL default '0',
34 rev_user_text
varchar(255) binary NOT NULL default '',
35 rev_timestamp
char(14) binary NOT NULL default '',
36 rev_minor_edit
tinyint(1) unsigned
NOT NULL default '0',
37 inverse_timestamp
char(14) binary NOT NULL default '',
39 PRIMARY KEY rev_page_id (rev_page
, rev_id
),
40 UNIQUE INDEX rev_id (rev_id
),
41 INDEX rev_timestamp (rev_timestamp
),
42 INDEX page_timestamp (rev_page
,inverse_timestamp
),
43 INDEX user_timestamp (rev_user
,inverse_timestamp
),
44 INDEX usertext_timestamp (rev_user_text
,inverse_timestamp
)
47 -- If creating new 'text' table it would look like this:
49 -- CREATE TABLE /*$wgDBprefix*/text (
50 -- old_id int(8) unsigned NOT NULL auto_increment,
51 -- old_text mediumtext NOT NULL default '',
52 -- old_flags tinyblob NOT NULL default '',
54 -- PRIMARY KEY old_id (old_id)
59 LOCK TABLES /*$wgDBprefix*/page
WRITE, /*$wgDBprefix*/revision
WRITE, /*$wgDBprefix*/old WRITE, /*$wgDBprefix*/cur
WRITE;
61 -- Save the last old_id value for later
62 SELECT (@maxold
:=MAX(old_id
)) FROM /*$wgDBprefix*/old;
64 -- First, copy all current entries into the old table.
66 INTO /*$wgDBprefix*/old
88 FROM /*$wgDBprefix*/cur
;
90 -- Now, copy all old data except the text into revisions
92 INTO /*$wgDBprefix*/revision
108 old.inverse_timestamp
,
110 FROM /*$wgDBprefix*/old,/*$wgDBprefix*/cur
111 WHERE old_namespace
=cur_namespace
112 AND old_title
=cur_title
;
114 -- And, copy the cur data into page
116 INTO /*$wgDBprefix*/page
138 FROM /*$wgDBprefix*/cur
,/*$wgDBprefix*/revision
139 WHERE cur_id
=rev_page
140 AND rev_timestamp
=cur_timestamp
141 AND rev_id
> @maxold
;
145 -- Keep the old table around as the text store.
146 -- Its extra fields will be ignored, but trimming them is slow
147 -- so we won't bother doing it for now.
148 ALTER TABLE /*$wgDBprefix*/old RENAME TO /*$wgDBprefix*/text;