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-- The Great Restructuring of October 2004
-- Creates 'page', 'revision' tables and transforms the classic
-- cur+old into a separate page+revision+text structure.
--
-- The pre-conversion 'old' table is renamed to 'text' and used
-- without internal restructuring to avoid rebuilding the entire
-- table. (This can be done separately if desired.)
--
-- The pre-conversion 'cur' table is now redundant and can be
-- discarded when done.
CREATE TABLE /*$wgDBprefix*/page (
page_id int unsigned NOT NULL auto_increment,
page_namespace tinyint NOT NULL,
page_title varchar(255) binary NOT NULL,
page_restrictions tinyblob NOT NULL,
page_counter bigint unsigned NOT NULL default '0',
page_is_redirect tinyint unsigned NOT NULL default '0',
page_is_new tinyint unsigned NOT NULL default '0',
page_random real unsigned NOT NULL,
page_touched binary(14) NOT NULL default '',
page_latest int unsigned NOT NULL,
page_len int unsigned NOT NULL,
PRIMARY KEY page_id (page_id),
UNIQUE INDEX name_title (page_namespace,page_title),
INDEX (page_random),
INDEX (page_len)
);
CREATE TABLE /*$wgDBprefix*/revision (
rev_id int unsigned NOT NULL auto_increment,
rev_page int unsigned NOT NULL,
rev_comment tinyblob NOT NULL,
rev_user int unsigned NOT NULL default '0',
rev_user_text varchar(255) binary NOT NULL default '',
rev_timestamp binary(14) NOT NULL default '',
rev_minor_edit tinyint unsigned NOT NULL default '0',
rev_deleted tinyint unsigned NOT NULL default '0',
PRIMARY KEY rev_page_id (rev_page, rev_id),
UNIQUE INDEX rev_id (rev_id),
INDEX rev_timestamp (rev_timestamp),
INDEX page_timestamp (rev_page,rev_timestamp),
INDEX user_timestamp (rev_user,rev_timestamp),
INDEX usertext_timestamp (rev_user_text,rev_timestamp)
);
-- If creating new 'text' table it would look like this:
--
-- CREATE TABLE /*$wgDBprefix*/text (
-- old_id int(8) unsigned NOT NULL auto_increment,
-- old_text mediumtext NOT NULL,
-- old_flags tinyblob NOT NULL,
--
-- PRIMARY KEY old_id (old_id)
-- );
-- Lock!
LOCK TABLES /*$wgDBprefix*/page WRITE, /*$wgDBprefix*/revision WRITE, /*$wgDBprefix*/old WRITE, /*$wgDBprefix*/cur WRITE;
-- Save the last old_id value for later
SELECT (@maxold:=MAX(old_id)) FROM /*$wgDBprefix*/old;
-- First, copy all current entries into the old table.
INSERT
INTO /*$wgDBprefix*/old
(old_namespace,
old_title,
old_text,
old_comment,
old_user,
old_user_text,
old_timestamp,
old_minor_edit,
old_flags)
SELECT
cur_namespace,
cur_title,
cur_text,
cur_comment,
cur_user,
cur_user_text,
cur_timestamp,
cur_minor_edit,
''
FROM /*$wgDBprefix*/cur;
-- Now, copy all old data except the text into revisions
INSERT
INTO /*$wgDBprefix*/revision
(rev_id,
rev_page,
rev_comment,
rev_user,
rev_user_text,
rev_timestamp,
rev_minor_edit)
SELECT
old_id,
cur_id,
old_comment,
old_user,
old_user_text,
old_timestamp,
old_minor_edit
FROM /*$wgDBprefix*/old,/*$wgDBprefix*/cur
WHERE old_namespace=cur_namespace
AND old_title=cur_title;
-- And, copy the cur data into page
INSERT
INTO /*$wgDBprefix*/page
(page_id,
page_namespace,
page_title,
page_restrictions,
page_counter,
page_is_redirect,
page_is_new,
page_random,
page_touched,
page_latest)
SELECT
cur_id,
cur_namespace,
cur_title,
cur_restrictions,
cur_counter,
cur_is_redirect,
cur_is_new,
cur_random,
cur_touched,
rev_id
FROM /*$wgDBprefix*/cur,/*$wgDBprefix*/revision
WHERE cur_id=rev_page
AND rev_timestamp=cur_timestamp
AND rev_id > @maxold;
UNLOCK TABLES;
-- Keep the old table around as the text store.
-- Its extra fields will be ignored, but trimming them is slow
-- so we won't bother doing it for now.
ALTER TABLE /*$wgDBprefix*/old RENAME TO /*$wgDBprefix*/text;
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