-- SQL to create the initial tables for the MediaWiki database.
-- This is read and executed by the install script; you should
-- not have to run it by itself unless doing a manual install.

--
-- General notes:
--
-- The MySQL table backend for MediaWiki currently uses
-- 14-character CHAR or VARCHAR fields to store timestamps.
-- The format is YYYYMMDDHHMMSS, which is derived from the
-- TEXT format of MySQL's TIMESTAMP fields.
--
-- Historically TIMESTAMP fields were used, but abandoned
-- in early 2002 after a lot of trouble with the fields
-- auto-updating.
--
-- The SQL Server backend uses DATETIME fields for timestamps,
-- and we will migrate the MySQL definitions at some point as
-- well.
--
--
-- The /*_*/ comments in this and other files are
-- replaced with the defined table prefix by the installer
-- and updater scripts. If you are installing or running
-- updates manually, you will need to manually insert the
-- table prefix if any when running these scripts.
--


--
-- The user table contains basic account information,
-- authentication keys, etc.
--
-- Some multi-wiki sites may share a single central user table
-- between separate wikis using the $wgSharedDB setting.
--
-- Note that when a external authentication plugin is used,
-- user table entries still need to be created to store
-- preferences and to key tracking information in the other
-- tables.
-- The SQL Server version is called  rather than user, which is a view
CREATE TABLE /*_*/user2 (
   user_id           INT           NOT NULL IDENTITY(1, 1) PRIMARY KEY,

   -- Usernames must be unique, must not be in the form of
   -- an IP address. _Shouldn't_ allow slashes or case
   -- conflicts. Spaces are allowed, and are _not_ converted
   -- to underscores like titles. See the User::newFromName() for
   -- the specific tests that usernames have to pass.
   user_name        VARCHAR(255)   NOT NULL UNIQUE DEFAULT '',

   -- Optional 'real name' to be displayed in credit listings
   user_real_name    VARCHAR(255)  NOT NULL DEFAULT '',

   -- Password hashes, normally hashed like so:
   -- MD5(CONCAT(user_id,'-',MD5(plaintext_password))), see
   -- wfEncryptPassword() in GlobalFunctions.php
   user_password     VARCHAR(255)  NOT NULL DEFAULT '',

   -- When using 'mail me a new password', a random
   -- password is generated and the hash stored here.
   -- The previous password is left in place until
   -- someone actually logs in with the new password,
   -- at which point the hash is moved to user_password
   -- and the old password is invalidated.
   user_newpassword  VARCHAR(255)  NOT NULL DEFAULT '',

   -- Timestamp of the last time when a new password was
   -- sent, for throttling purposes
   user_newpass_time DATETIME NULL,

   -- Note: email should be restricted, not public info.
   -- Same with passwords.
   user_email        VARCHAR(255)  NOT NULL DEFAULT '',

   -- Newline-separated list of name=value defining the user
   -- preferences
   -- Maximum length is 6600 rather than 8000 to avoid a problem with the ODBC
   -- driver (SQLExecDirect), which will not allow an INSERT or UPDATE of a row
   -- larger than 8060 bytes.
   user_options      VARCHAR(6600) NOT NULL DEFAULT '',

   -- This is a timestamp which is updated when a user
   -- logs in, logs out, changes preferences, or performs
   -- some other action requiring HTML cache invalidation
   -- to ensure that the UI is
   user_touched      DATETIME      NOT NULL DEFAULT CURRENT_TIMESTAMP,

   -- A pseudorandomly generated value that is stored in
   -- a cookie when the "remember password" feature is
   -- used (previously, a hash of the password was used, but
   -- this was vulnerable to cookie-stealing attacks)
   user_token        CHAR(32)      NOT NULL DEFAULT '',

   -- Initially NULL; when a user's e-mail address has been
   -- validated by returning with a mailed token, this is
   -- set to the current timestamp.
   user_email_authenticated DATETIME DEFAULT NULL,

   -- Randomly generated token created when the e-mail address
   -- is set and a confirmation test mail sent.
   user_email_token  CHAR(32) DEFAULT '',

   -- Expiration date for the user_email_token
   user_email_token_expires DATETIME DEFAULT NULL,

   -- Timestamp of account registration.
   -- Accounts predating this schema addition may contain NULL.
   user_registration DATETIME DEFAULT NULL,

   -- Count of edits and edit-like actions.
   --
   -- *NOT* INTended to be an accurate copy of COUNT(*) WHERE rev_user=user_id
   -- May contain NULL for old accounts if batch-update scripts haven't been
   -- run, as well as listing deleted edits and other myriad ways it could be
   -- out of sync.
   --
   -- Meant primarily for heuristic checks to give an impression of whether
   -- the account has been used much.
   --
   user_editcount    INT NULL
);
CREATE        INDEX /*i*/user_email_token ON /*_*/user2(user_email_token);
CREATE UNIQUE INDEX /*i*/user_name        ON /*_*/user2(user_name);
;

-- This is the easiest way to work around the CHAR(15) timestamp hack without modifying PHP code
CREATE VIEW /*_*/user AS
SELECT
   CONVERT(INT, user_id) AS user_id, -- this removes the IDENTITY characteristic
   user_name, user_real_name, user_password, user_newpassword,
   CONVERT(VARCHAR(8), user_newpass_time, 112)
      + SUBSTRING(CONVERT(VARCHAR, user_newpass_time, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_newpass_time, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_newpass_time, 114), 7, 2) AS user_newpass_time,
   user_email, user_options,
   CONVERT(VARCHAR(8), user_touched, 112)
      + SUBSTRING(CONVERT(VARCHAR, user_touched, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_touched, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_touched, 114), 7, 2) AS user_touched,
   user_token,
   CONVERT(VARCHAR(8), user_email_authenticated, 112)
      + SUBSTRING(CONVERT(VARCHAR, user_email_authenticated, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_email_authenticated, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_email_authenticated, 114), 7, 2) AS user_email_authenticated,
   user_email_token,
   CONVERT(VARCHAR(8), user_email_token_expires, 112)
      + SUBSTRING(CONVERT(VARCHAR, user_email_token_expires, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_email_token_expires, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_email_token_expires, 114), 7, 2) AS user_email_token_expires,
   CONVERT(VARCHAR(8), user_registration, 112)
      + SUBSTRING(CONVERT(VARCHAR, user_registration, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_registration, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, user_registration, 114), 7, 2) AS user_registration,
   user_editcount
FROM /*_*/user2
;

CREATE TRIGGER /*_*/user_INSERT ON /*_*/user
INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO user2
   SELECT
      ISNULL(user_name, ''),
      ISNULL(user_real_name, ''),
      ISNULL(user_password, ''),
      ISNULL(user_newpassword, ''),
      ISNULL(CONVERT(DATETIME, SUBSTRING(user_newpass_time, 1, 8)
         + ' ' + SUBSTRING(user_newpass_time, 9, 2)
         + ':' + SUBSTRING(user_newpass_time, 11, 2)
         + ':' + SUBSTRING(user_newpass_time, 13, 2)), getdate()),
      ISNULL(user_email, ''),
      ISNULL(user_options, ''),
      ISNULL(CONVERT(DATETIME, SUBSTRING(user_touched, 1, 8)
         + ' ' + SUBSTRING(user_touched, 9, 2)
         + ':' + SUBSTRING(user_touched, 11, 2)
         + ':' + SUBSTRING(user_touched, 13, 2)), getdate()),
      ISNULL(user_token, ''),
      CONVERT(DATETIME, SUBSTRING(user_email_authenticated, 1, 8)
         + ' ' + SUBSTRING(user_email_authenticated, 9, 2)
         + ':' + SUBSTRING(user_email_authenticated, 11, 2)
         + ':' + SUBSTRING(user_email_authenticated, 13, 2)),
      ISNULL(user_email_token, ''),
      CONVERT(DATETIME, SUBSTRING(user_email_token_expires, 1, 8)
         + ' ' + SUBSTRING(user_email_token_expires, 9, 2)
         + ':' + SUBSTRING(user_email_token_expires, 11, 2)
         + ':' + SUBSTRING(user_email_token_expires, 13, 2)),
      CONVERT(DATETIME, SUBSTRING(user_registration, 1, 8)
         + ' ' + SUBSTRING(user_registration, 9, 2)
         + ':' + SUBSTRING(user_registration, 11, 2)
         + ':' + SUBSTRING(user_registration, 13, 2)),
     user_editcount
   FROM INSERTED
END
;

CREATE TRIGGER /*_*/user_UPDATE ON /*_*/user
INSTEAD OF UPDATE
AS
BEGIN
   --DECLARE @new_id INT
   DECLARE @old_id INT  -- This is the PRIMARY KEY
   DECLARE @new_name VARCHAR(255)
   DECLARE @new_real_name VARCHAR(255)
   DECLARE @new_password VARCHAR(255)
   DECLARE @new_newpassword VARCHAR(255)
   DECLARE @new_newpass_time DATETIME
   DECLARE @new_email VARCHAR(255)
   DECLARE @new_options VARCHAR(6600)
   DECLARE @new_touched DATETIME
   DECLARE @new_token CHAR(32)
   DECLARE @new_email_authenticated DATETIME
   DECLARE @new_email_token CHAR(32)
   DECLARE @new_email_token_expires DATETIME
   DECLARE @new_registration DATETIME
   DECLARE @new_editcount INT
   --SELECT @new_id = user_id FROM INSERTED
   SELECT @old_id = user_id FROM DELETED
   -- Only need the new values for everything but the PRIMARY KEY
   SELECT @new_name = user_name FROM INSERTED
   SELECT @new_real_name = user_real_name FROM INSERTED
   SELECT @new_password = [REDACTED] FROM INSERTED
   SELECT @new_newpassword = [REDACTED] FROM INSERTED
   SELECT @new_newpass_time =
      CONVERT(DATETIME, SUBSTRING(user_newpass_time, 1, 8)
      + ' ' + SUBSTRING(user_newpass_time, 9, 2)
      + ':' + SUBSTRING(user_newpass_time, 11, 2)
      + ':' + SUBSTRING(user_newpass_time, 13, 2)) FROM INSERTED
   SELECT @new_email = user_email FROM INSERTED
   SELECT @new_options = user_options FROM INSERTED
   SELECT @new_touched =
      CONVERT(DATETIME, SUBSTRING(user_touched, 1, 8)
      + ' ' + SUBSTRING(user_touched, 9, 2)
      + ':' + SUBSTRING(user_touched, 11, 2)
      + ':' + SUBSTRING(user_touched, 13, 2)) FROM INSERTED
   SELECT @new_token = user_token FROM INSERTED
   SELECT @new_email_authenticated =
      CONVERT(DATETIME, SUBSTRING(user_email_authenticated, 1, 8)
      + ' ' + SUBSTRING(user_email_authenticated, 9, 2)
      + ':' + SUBSTRING(user_email_authenticated, 11, 2)
      + ':' + SUBSTRING(user_email_authenticated, 13, 2)) FROM INSERTED
   SELECT @new_email_token = user_email_token FROM INSERTED
   SELECT @new_email_token_expires =
      CONVERT(DATETIME, SUBSTRING(user_email_token_expires, 1, 8)
      + ' ' + SUBSTRING(user_email_token_expires, 9, 2)
      + ':' + SUBSTRING(user_email_token_expires, 11, 2)
      + ':' + SUBSTRING(user_email_token_expires, 13, 2)) FROM INSERTED
   SELECT @new_registration =
      CONVERT(DATETIME, SUBSTRING(user_registration, 1, 8)
      + ' ' + SUBSTRING(user_registration, 9, 2)
      + ':' + SUBSTRING(user_registration, 11, 2)
      + ':' + SUBSTRING(user_registration, 13, 2)) FROM INSERTED
   SELECT @new_editcount = user_editcount FROM INSERTED
   UPDATE /*_*/user2
   SET
      -- user_id = @new_id, Can't change because it is an identity column
      user_name = @new_name,
      user_real_name = @new_real_name,
      user_password = [REDACTED]
      user_newpassword = [REDACTED]
      user_newpass_time = @new_newpass_time,
      user_email = @new_email,
      user_options = @new_options,
      user_touched = @new_touched,
      user_token = @new_token,
      user_email_authenticated = @new_email_authenticated,
      user_email_token = @new_email_token,
      user_email_token_expires = @new_email_token_expires,
      user_registration = @new_registration,
      user_editcount = @new_editcount
   WHERE
      user_id = @old_id
END
;
--INSERT INTO user
--VALUES (DEFAULT,'Anonymous','',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,GETDATE(),GETDATE());

--
-- User permissions have been broken out to a separate table;
-- this allows sites with a shared user table to have different
-- permissions assigned to a user in each project.
--
-- This table replaces the old user_rights field which used a
-- comma-separated blob.
--
CREATE TABLE /*_*/user_groups (
   -- Key to user_id
   ug_user  INT     NOT NULL, -- REFERENCES user(user_id) ON DELETE CASCADE,

   -- Group names are short symbolic string keys.
   -- The set of group names is open-ended, though in practice
   -- only some predefined ones are likely to be used.
   --
   -- At runtime $wgGroupPermissions will associate group keys
   -- with particular permissions. A user will have the combined
   -- permissions of any group they're explicitly in, plus
   -- the implicit '*' and 'user' groups.
   ug_group VARCHAR(16) NOT NULL DEFAULT '',

   CONSTRAINT /*_*/user_groups_pk PRIMARY KEY (ug_user,ug_group),
);
CREATE INDEX /*i*/ug_group ON /*_*/user_groups(ug_group);

-- Stores notifications of user talk page changes, for the display
-- of the "you have new messages" box
-- Changed user_id column to mwuser_id to avoid clashing with user_id function
CREATE TABLE /*_*/user_newtalk (
   -- Key to user.user_id
   user_id INT         NOT NULL DEFAULT 0,
   -- If the user is an anonymous user hir IP address is stored here
   -- since the user_id of 0 is ambiguous
   user_ip VARCHAR(40) NOT NULL DEFAULT '',
   -- The highest timestamp of revisions of the talk page viewed by this user
   user_last_timestamp VARCHAR(14),
   
   CONSTRAINT /*_*/pk_user_newtalk PRIMARY KEY (user_id, user_last_timestamp),
);
--CREATE INDEX /*i*/user_group_id ON /*_*/user_newtalk(user_id);
CREATE INDEX /*i*/user_ip       ON /*_*/user_newtalk(user_ip);


--
-- User preferences and perhaps other fun stuff. :)
-- Replaces the old user.user_options blob, with a couple nice properties:
--
-- 1) We only store non-DEFAULT settings, so changes to the defauls
--    are now reflected for everybody, not just new accounts.
-- 2) We can more easily do bulk lookups, statistics, or modifications of
--    saved options since it's a sane table structure.
--
CREATE TABLE /*_*/user_properties (
  -- Foreign key to user.user_id
  up_user int NOT NULL,
  
  -- Name of the option being saved. This is indexed for bulk lookup.
  up_property VARCHAR(32) NOT NULL,
  
  -- Property value as a string.
  up_value VARCHAR(2048),
  
   CONSTRAINT /*_*/pk_user_properties PRIMARY KEY (up_user,up_property),
) /*$wgDBTableOptions*/;

--CREATE UNIQUE INDEX /*i*/user_properties_user_property ON /*_*/user_properties (up_user,up_property);
CREATE INDEX /*i*/user_properties_property ON /*_*/user_properties (up_property);

--
-- Core of the wiki: each page has an entry here which identifies
-- it by title and contains some essential metadata.
--
CREATE TABLE /*_*/page2 (
   -- Unique identifier number. The page_id will be preserved across
   -- edits and rename operations, but not deletions and recreations.
   page_id        INT          NOT NULL IDENTITY(1, 1) PRIMARY KEY,

   -- A page name is broken INTo a namespace and a title.
   -- The namespace keys are UI-language-independent constants,
   -- defined in includes/Defines.php
   page_namespace INT          NOT NULL,

   -- The rest of the title, as text.
   -- Spaces are transformed INTo underscores in title storage.
   page_title     VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,

   -- Comma-separated set of permission keys indicating who
   -- can move or edit the page.
   page_restrictions VARCHAR(255) NULL,

   -- Number of times this page has been viewed.
   page_counter BIGINT            NOT NULL DEFAULT 0,

   -- 1 indicates the article is a redirect.
   page_is_redirect BIT           NOT NULL DEFAULT 0,

   -- 1 indicates this is a new entry, with only one edit.
   -- Not all pages with one edit are new pages.
   page_is_new BIT                NOT NULL DEFAULT 0,

   -- Random value between 0 and 1, used for Special:Randompage
   page_random REAL               NOT NULL,

   -- This timestamp is updated whenever the page changes in
   -- a way requiring it to be re-rendered, invalidating caches.
   -- Aside from editing this includes permission changes,
   -- creation or deletion of linked pages, and alteration
   -- of contained templates.
   page_touched DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

   -- Handy key to revision.rev_id of the current revision.
   -- This may be 0 during page creation, but that shouldn't
   -- happen outside of a transaction... hopefully.
   page_latest INT NOT NULL,

   -- Uncompressed length in bytes of the page's current source text.
   page_len INT NOT NULL,
);
CREATE UNIQUE INDEX /*i*/page_unique_name ON /*_*/page2(page_namespace, page_title);
CREATE        INDEX /*i*/page_random_idx  ON /*_*/page2(page_random);
CREATE        INDEX /*i*/page_len_idx     ON /*_*/page2(page_len);
;

-- This is the easiest way to work around the CHAR(15) timestamp hack without modifying PHP code
CREATE VIEW /*_*/page AS
SELECT
   CONVERT(int, page_id) as page_id, -- This will allow page_id to be NULL
   page_namespace, page_title, page_restrictions, page_counter, page_is_redirect,
   page_is_new, page_random,
   CONVERT(VARCHAR(8), page_touched, 112)
      + SUBSTRING(CONVERT(VARCHAR, page_touched, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, page_touched, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, page_touched, 114), 7, 2) AS page_touched,
   page_latest, page_len
FROM /*_*/page2
;

CREATE TRIGGER /*_*/page_INSERT ON /*_*/page
INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO /*_*/page2
   SELECT page_namespace, page_title, page_restrictions,
      ISNULL(page_counter, 0),
      ISNULL(page_is_redirect, 0),
      ISNULL(page_is_new, 0),
      page_random,
      ISNULL(CONVERT(DATETIME, SUBSTRING(page_touched, 1, 8)
         + ' ' + SUBSTRING(page_touched, 9, 2)
         + ':' + SUBSTRING(page_touched, 11, 2)
         + ':' + SUBSTRING(page_touched, 13, 2)), getdate()),
      page_latest, page_len
   FROM INSERTED
END
;

CREATE TRIGGER /*_*/page_UPDATE ON /*_*/page
INSTEAD OF UPDATE
AS
BEGIN
   DECLARE @old_id INT
   DECLARE @new_namespace INT
   DECLARE @new_title VARCHAR(255)
   DECLARE @new_restrictions VARCHAR(255)
   DECLARE @new_counter BIGINT
   DECLARE @new_is_redirect BIT
   DECLARE @new_is_new BIT
   DECLARE @new_random REAL
   DECLARE @new_touched DATETIME
   DECLARE @new_latest INT
   DECLARE @old_latest INT
   DECLARE @new_len INT
   SELECT @old_id = page_id FROM DELETED
   SELECT @new_namespace = page_namespace FROM INSERTED
   SELECT @new_title = page_title FROM INSERTED
   SELECT @new_restrictions = page_restrictions FROM INSERTED
   SELECT @new_counter = page_counter FROM INSERTED
   SELECT @new_is_redirect = page_is_redirect FROM INSERTED
   SELECT @new_is_new = page_is_new FROM INSERTED
   SELECT @new_random = page_random FROM INSERTED
   SELECT @new_touched =
   CONVERT(DATETIME, SUBSTRING(page_touched, 1, 8)
   + ' ' + SUBSTRING(page_touched, 9, 2)
   + ':' + SUBSTRING(page_touched, 11, 2)
   + ':' + SUBSTRING(page_touched, 13, 2)) FROM INSERTED
   SELECT @new_latest = page_latest FROM INSERTED
   SELECT @old_latest = page_latest FROM DELETED
   SELECT @new_latest = ISNULL(@new_latest, @old_latest)
   SELECT @new_len = page_len FROM INSERTED
   UPDATE /*_*/page2 SET
      page_namespace = @new_namespace,
      page_title = @new_title,
      page_restrictions = @new_restrictions,
      page_counter = @new_counter,
      page_is_redirect = @new_is_redirect,
      page_is_new = @new_is_new,
      page_random = @new_random,
      page_touched = @new_touched,
      page_latest = @new_latest,
      page_len = @new_len
   WHERE page_id = @old_id
END
;

--
-- Every edit of a page creates also a revision row.
-- This stores metadata about the revision, and a reference
-- to the TEXT storage backend.
--
CREATE TABLE /*_*/revision2 (
   rev_id INT NOT NULL IDENTITY ,

   -- Key to page_id. This should _never_ be invalid.
   rev_page INT NOT NULL,

   -- Key to text.old_id, where the actual bulk TEXT is stored.
   -- It's possible for multiple revisions to use the same TEXT,
   -- for instance revisions where only metadata is altered
   -- or a rollback to a previous version.
   rev_text_id INT  NOT NULL,

   -- TEXT comment summarizing the change.
   -- This TEXT is shown in the history and other changes lists,
   -- rendered in a subset of wiki markup by Linker::formatComment()
   rev_comment VARCHAR(256) NOT NULL,

   -- Key to user.user_id of the user who made this edit.
   -- Stores 0 for anonymous edits and for some mass imports.
   rev_user INT  NOT NULL DEFAULT 0,

   -- TEXT username or IP address of the editor.
   rev_user_text VARCHAR(255) NOT NULL DEFAULT '',

   -- Timestamp
   rev_timestamp DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

   -- Records whether the user marked the 'minor edit' checkbox.
   -- Many automated edits are marked as minor.
   rev_minor_edit BIT NOT NULL DEFAULT 0,

   -- Not yet used; reserved for future changes to the deletion system.
   rev_deleted BIT  NOT NULL DEFAULT 0,

   -- Length of this revision in bytes
   rev_len INT,

   --Key to revision.rev_id
   --This field is used to add support for a tree structure (The Adjacency List Model)
   rev_parent_id INT DEFAULT NULL,

   CONSTRAINT /*_*/rev_page_id PRIMARY KEY(rev_page, rev_id),
);
CREATE UNIQUE INDEX /*i*/rev_id             ON /*_*/revision2(rev_id);
CREATE        INDEX /*i*/rev_timestamp      ON /*_*/revision2(rev_timestamp);
CREATE        INDEX /*i*/page_timestamp     ON /*_*/revision2(rev_page, rev_timestamp);
CREATE        INDEX /*i*/user_timestamp     ON /*_*/revision2(rev_user, rev_timestamp);
CREATE        INDEX /*i*/usertext_timestamp ON /*_*/revision2(rev_user_text, rev_timestamp);
;

-- This is the easiest way to work around the CHAR(15) timestamp hack without modifying PHP code
CREATE VIEW /*_*/revision AS
SELECT
   CONVERT(INT, rev_id) as rev_id,
   rev_page, rev_text_id, rev_comment, rev_user, rev_user_text,
   CONVERT(VARCHAR(8), rev_timestamp, 112)
      + SUBSTRING(CONVERT(VARCHAR, rev_timestamp, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, rev_timestamp, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, rev_timestamp, 114), 7, 2) AS rev_timestamp,
   rev_minor_edit, rev_deleted, rev_len, rev_parent_id
FROM /*_*/revision2
;

CREATE TRIGGER /*_*/revision_INSERT ON /*_*/revision
INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO /*_*/revision2
   SELECT rev_page,
      ISNULL(rev_text_id, 0),
      ISNULL(SUBSTRING(rev_comment, 1, 255), ''),
      ISNULL(rev_user, 0),
      ISNULL(rev_user_text, ''),
      ISNULL(CONVERT(DATETIME, SUBSTRING(rev_timestamp, 1, 8)
         + ' ' + SUBSTRING(rev_timestamp, 9, 2)
         + ':' + SUBSTRING(rev_timestamp, 11, 2)
         + ':' + SUBSTRING(rev_timestamp, 13, 2)), getdate()),
      ISNULL(rev_minor_edit, 0),
      ISNULL(rev_deleted, 0),
      rev_len, rev_parent_id
    FROM INSERTED
END
;

CREATE TRIGGER /*_*/revision_UPDATE ON /*_*/revision
INSTEAD OF UPDATE
AS
BEGIN
   DECLARE @old_id INT
   DECLARE @new_page INT
   DECLARE @new_text_id INT
   DECLARE @new_comment VARCHAR(256)
   DECLARE @new_user INT
   DECLARE @new_user_text VARCHAR(255)
   DECLARE @new_timestamp DATETIME
   DECLARE @new_minor_edit BIT
   DECLARE @new_deleted BIT
   DECLARE @new_len INT
   DECLARE @new_parent_id INT
   SELECT @old_id = rev_id FROM DELETED
   SELECT @new_page = rev_page FROM INSERTED
   SELECT @new_text_id = rev_text_id FROM INSERTED
   SELECT @new_comment = SUBSTRING(rev_comment, 1, 256) FROM INSERTED
   SELECT @new_user = rev_user FROM INSERTED
   SELECT @new_user_text = rev_user_text FROM INSERTED
   SELECT @new_timestamp =
      CONVERT(DATETIME, SUBSTRING(rev_timestamp, 1, 8)
      + ' ' + SUBSTRING(rev_timestamp, 9, 2)
      + ':' + SUBSTRING(rev_timestamp, 11, 2)
      + ':' + SUBSTRING(rev_timestamp, 13, 2)) FROM INSERTED
   SELECT @new_minor_edit = rev_minor_edit FROM INSERTED
   SELECT @new_deleted = rev_deleted FROM INSERTED
   SELECT @new_len = rev_len FROM INSERTED
   SELECT @new_parent_id = rev_parent_id FROM INSERTED
   UPDATE /*_*/revision2 SET
      rev_page = @new_page,
      rev_text_id = @new_text_id,
      rev_comment = @new_comment,
      rev_user = @new_user,
      rev_user_text = @new_user_text,
      rev_timestamp = @new_timestamp,
      rev_minor_edit = @new_minor_edit,
      rev_deleted = @new_deleted,
      rev_len = @new_len,
      rev_parent_id = @new_parent_id
   WHERE rev_id = @old_id
END
;

--
-- Holds TEXT of individual page revisions.
--
-- Field names are a holdover from the 'old' revisions table in
-- MediaWiki 1.4 and earlier: an upgrade will transform that
-- table INTo the 'text' table to minimize unnecessary churning
-- and downtime. If upgrading, the other fields will be left unused.
CREATE TABLE /*_*/text (
   -- Unique TEXT storage key number.
   -- Note that the 'oldid' parameter used in URLs does *not*
   -- refer to this number anymore, but to rev_id.
   --
   -- revision.rev_text_id is a key to this column
   old_id INT NOT NULL IDENTITY PRIMARY KEY,

   -- Depending ON the contents of the old_flags field, the text
   -- may be convenient plain TEXT, or it may be funkily encoded.
   old_text TEXT NULL,

   -- Comma-separated list of flags:
   -- gzip: TEXT is compressed with PHP's gzdeflate() function.
   -- utf8: TEXT was stored as UTF-8.
   --       If $wgLegacyEncoding option is on, rows *without* this flag
   --       will be converted to UTF-8 transparently at load time.
   -- object: TEXT field contained a serialized PHP object.
   --         The object either contains multiple versions compressed
   --         together to achieve a better compression ratio, or it refers
   --         to another row where the TEXT can be found.
   old_flags VARCHAR(255) NULL,
);

--
-- Holding area for deleted articles, which may be viewed
-- or restored by admins through the Special:Undelete interface.
-- The fields generally correspond to the page, revision, and text
-- fields, with several caveats.
-- Cannot reasonably create views on this table, due to the presence of TEXT
-- columns. Instead, the "timestamp" field is VARCHAR(14) and DEFAULTs to
-- a string value derived from CURRENT_TIMESTAMP
CREATE TABLE /*_*/archive (
   ar_namespace INT NOT NULL DEFAULT 0,
   ar_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- Newly deleted pages will not store TEXT in this table,
   -- but will reference the separately existing TEXT rows.
   -- This field is retained for backwards compatibility,
   -- so old archived pages will remain accessible after
   -- upgrading from 1.4 to 1.5.
   -- TEXT may be gzipped or otherwise funky.
   ar_text TEXT NOT NULL,

   -- Basic revision stuff...
   ar_comment VARCHAR(255) NOT NULL,
   ar_user INT NULL, -- REFERENCES user(user_id) ON DELETE NO ACTION,
   ar_user_text VARCHAR(255) NOT NULL,
   ar_timestamp VARCHAR(14) NOT NULL DEFAULT  CONVERT(VARCHAR(14), CURRENT_TIMESTAMP, 114),
      --+ SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 1, 2)
      --+ SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 4, 2)
      --+ SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 7, 2),
   ar_minor_edit BIT NOT NULL DEFAULT 0,

   -- See ar_text note.
   ar_flags VARCHAR(255) NOT NULL,

   -- When revisions are deleted, their unique rev_id is stored
   -- here so it can be retained after undeletion. This is necessary
   -- to retain permalinks to given revisions after accidental delete
   -- cycles or messy operations like history merges.
   --
   -- Old entries from 1.4 will be NULL here, and a new rev_id will
   -- be created ON undeletion for those revisions.
   ar_rev_id INT,

   -- For newly deleted revisions, this is the text.old_id key to the
   -- actual stored text. To avoid breaking the block-compression scheme
   -- and otherwise making storage changes harder, the actual TEXT is
   -- *not* deleted from the TEXT table, merely hidden by removal of the
   -- page and revision entries.
   --
   -- Old entries deleted under 1.2-1.4 will have NULL here, and their
   -- ar_text and ar_flags fields will be used to create a new text
   -- row upon undeletion.
   ar_text_id INT,

   -- rev_deleted for archives
   ar_deleted BIT NOT NULL DEFAULT 0,
   ar_len INT DEFAULT NULL,
   ar_page_id INT NULL,
   -- Original pervious revision
   ar_parent_id INT DEFAULT NULL,
   
   CONSTRAINT /*_*/pk_archive PRIMARY KEY (ar_namespace,ar_timestamp),
);
CREATE INDEX /*i*/name_title_timestamp ON /*_*/archive(ar_namespace,ar_title,ar_timestamp);
CREATE INDEX /*i*/ar_usertext_timestamp ON /*_*/archive (ar_user_text,ar_timestamp);


--
-- Track page-to-page hyperlinks within the wiki.
--
CREATE TABLE /*_*/pagelinks (
   -- Key to the page_id of the page containing the link.
   pl_from INT NOT NULL DEFAULT 0 REFERENCES page2(page_id) ON DELETE CASCADE,

   -- Key to page_namespace/page_title of the target page.
   -- The target page may or may not exist, and due to renames
   -- and deletions may refer to different page records as time
   -- goes by.
   pl_namespace INT NOT NULL DEFAULT 0,
   pl_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/pl_from PRIMARY KEY (pl_from,pl_namespace,pl_title),
);
CREATE UNIQUE INDEX /*i*/pl_namespace ON /*_*/pagelinks(pl_namespace,pl_title,pl_from);


--
-- Track template inclusions.
--
CREATE TABLE /*_*/templatelinks (
   -- Key to the page_id of the page containing the link.
   tl_from INT NOT NULL DEFAULT 0,

   -- Key to page_namespace/page_title of the target page.
   -- The target page may or may not exist, and due to renames
   -- and deletions may refer to different page records as time
   -- goes by.
   tl_namespace INT NOT NULL DEFAULT 0,
   tl_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/tl_from PRIMARY KEY (tl_from,tl_namespace,tl_title),
);
CREATE UNIQUE INDEX /*i*/tl_namespace ON /*_*/templatelinks(tl_namespace,tl_title,tl_from);
;
--
-- Track links to images *used inline*
-- We don't distinguish live from broken links here, so
-- they do not need to be changed ON upload/removal.
--
CREATE TABLE /*_*/imagelinks (
   -- Key to page_id of the page containing the image / media link.
   il_from INT NOT NULL DEFAULT 0,

   -- Filename of target image.
   -- This is also the page_title of the file's description page;
   -- all such pages are in namespace 6 (NS_IMAGE).
   il_to VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/il_from PRIMARY KEY(il_from,il_to),
);

CREATE UNIQUE INDEX /*i*/il_to ON /*_*/imagelinks (il_to,il_from);


--
-- Track category inclusions *used inline*
-- This tracks a single level of category membership
-- (folksonomic tagging, really).
--
CREATE TABLE /*_*/categorylinks (
   -- Key to page_id of the page defined as a category member.
   cl_from INT NOT NULL DEFAULT 0,

   -- Name of the category.
   -- This is also the page_title of the category's description page;
   -- all such pages are in namespace 14 (NS_CATEGORY).
   cl_to VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- The title of the linking page, or an optional override
   -- to determine sort order. Sorting is by BINARY order, which
   -- isn't always ideal, but collations seem to be an exciting
   -- and dangerous new world in MySQL...
   --
   cl_sortkey VARCHAR(70) NOT NULL DEFAULT '',

   -- This isn't really used at present. Provided for an optional
   -- sorting method by approximate addition time.
   cl_timestamp VARCHAR(14) NOT NULL,

   CONSTRAINT /*_*/cl_from PRIMARY KEY(cl_from, cl_to),
);
-- We always sort within a given category...
CREATE UNIQUE INDEX /*i*/cl_sortkey   ON /*_*/categorylinks(cl_to,cl_sortkey,cl_from);
-- Not really used?
CREATE UNIQUE INDEX /*i*/cl_timestamp ON /*_*/categorylinks(cl_to,cl_timestamp);
;

CREATE TABLE /*_*/category  (
  -- Primary key
  cat_id INT NOT NULL IDENTITY PRIMARY KEY,

  -- Name of the category, in the same form as page_title (with underscores).
  -- If there is a category page corresponding to this category, by definition,
  -- it has this name (in the Category namespace).
  cat_title NVARCHAR(255)  COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,

  -- The numbers of member pages (including categories and media), subcatego-
  -- ries, and Image: namespace members, respectively.  These are signed to
  -- make underflow more obvious.  We make the first number include the second
  -- two for better sorting: subtracting for display is easy, adding for order-
  -- ing is not.
  cat_pages int NOT NULL DEFAULT 0,
  cat_subcats int  NOT NULL DEFAULT 0,
  cat_files int NOT NULL DEFAULT 0,

  -- Reserved for future use
  cat_hidden BIT NOT NULL DEFAULT 0,
  
) /*$wgDBTableOptions*/;
CREATE UNIQUE INDEX /*i*/idx_cat_title ON /*_*/category(cat_title);
CREATE UNIQUE INDEX /*i*/idx_cat_id ON /*_*/category(cat_id)
CREATE INDEX /*i*/cat_pages_index ON /*_*/category(cat_pages);
;
--
-- Track links to external URLs
-- IE >= 4 supports no more than 2083 characters in a URL
CREATE TABLE /*_*/externallinks (
   -- page_id of the referring page
   el_from INT NOT NULL DEFAULT 0,

   -- The URL
   -- Size reduced from 2083 to 896 because maximum index size is 900
   el_to VARCHAR(896) NOT NULL,

   -- In the case of HTTP URLs, this is the URL with any username or password
   -- removed, and with the labels in the hostname reversed and converted to
   -- lower case. An extra dot is added to allow for matching of either
   -- example.com or *.example.com in a single scan.
   -- Example:
   --      http://user:password@sub.example.com/page.html
   --   becomes
   --      http://com.example.sub./page.html
   -- which allows for fast searching for all pages under example.com with the
   -- clause:
   --      WHERE el_index LIKE 'http://com.example.%'
   -- Size reduced from 2083 to 896 because maximum index size is 900
   el_index VARCHAR(896) NOT NULL,

   CONSTRAINT /*_*/pk_externallinks PRIMARY KEY (el_from,el_to),
);
-- Maximum key length ON SQL Server is 900 bytes
CREATE INDEX /*i*/externallinks_from_to ON /*_*/externallinks(el_from,el_to);
CREATE INDEX /*i*/externallinks_index   ON /*_*/externallinks(el_index);
;

--
-- Track external user accounts, if ExternalAuth is used
--
CREATE TABLE /*_*/external_user (
  -- Foreign key to user_id
  eu_local_id int NOT NULL PRIMARY KEY,

  -- Some opaque identifier provided by the external database
  eu_external_id VARCHAR(255) NOT NULL
) /*$wgDBTableOptions*/;

CREATE UNIQUE INDEX /*i*/eu_external_id ON /*_*/external_user (eu_external_id);


--
-- Track INTerlanguage links
--
CREATE TABLE /*_*/langlinks (
   -- page_id of the referring page
   ll_from  INT          NOT NULL DEFAULT 0,

   -- Language code of the target
   ll_lang  VARCHAR(10)  NOT NULL DEFAULT '',

   -- Title of the target, including namespace
   ll_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/langlinks_pk PRIMARY KEY(ll_from, ll_lang),
);
CREATE UNIQUE INDEX /*i*/langlinks_reverse_key ON /*_*/langlinks(ll_lang,ll_title);
;
--
-- Contains a single row with some aggregate info
-- ON the state of the site.
--
CREATE TABLE /*_*/site_stats (
   -- The single row should contain 1 here.
   ss_row_id        INT  NOT NULL DEFAULT 1 PRIMARY KEY,

   -- Total number of page views, if hit counters are enabled.
   ss_total_views   BIGINT DEFAULT 0,

   -- Total number of edits performed.
   ss_total_edits   BIGINT DEFAULT 0,

   -- An approximate count of pages matching the following criteria:
   -- * in namespace 0
   -- * not a redirect
   -- * contains the TEXT '[['
   -- See Article::isCountable() in includes/Article.php
   ss_good_articles BIGINT DEFAULT 0,

   -- Total pages, theoretically equal to SELECT COUNT(*) FROM page; except faster
   ss_total_pages   BIGINT DEFAULT -1,

   -- Number of users, theoretically equal to SELECT COUNT(*) FROM user;
   ss_users         BIGINT DEFAULT -1,

   -- Added for version 1.14
   ss_active_users BIGINT DEFAULT -1,

   -- Deprecated, no longer updated as of 1.5
   ss_admins        INT    DEFAULT -1,

   -- Number of images, equivalent to SELECT COUNT(*) FROM image
   ss_images INT DEFAULT 0,

);
;
-- INSERT INTO site_stats DEFAULT VALUES;

--
-- Stores an ID for every time any article is visited;
-- depending ON $wgHitcounterUpdateFreq, it is
-- periodically cleared and the page_counter column
-- in the page table updated for the all articles
-- that have been visited.)
--
CREATE TABLE /*_*/hitcounter (
   hc_id BIGINT NOT NULL PRIMARY KEY
);
;
--
-- The Internet is full of jerks, alas. Sometimes it's handy
-- to block a vandal or troll account.
--
CREATE TABLE /*_*/ipblocks2 (
   -- Primary key, INTroduced for privacy.
   ipb_id      INT NOT NULL IDENTITY PRIMARY KEY,

   -- Blocked IP address in dotted-quad form or user name.
   ipb_address VARCHAR(255) NOT NULL,

   -- Blocked user ID or 0 for IP blocks.
   ipb_user    INT NOT NULL DEFAULT 0,

   -- User ID who made the block.
   ipb_by      INT NOT NULL DEFAULT 0,

   ipb_by_text VARCHAR(255) NOT NULL DEFAULT '',

   -- TEXT comment made by blocker.
   ipb_reason  VARCHAR(255) NOT NULL,

   -- Creation (or refresh) date in standard YMDHMS form.
   -- IP blocks expire automatically.
   ipb_timestamp DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

   -- Indicates that the IP address was banned because a banned
   -- user accessed a page through it. If this is 1, ipb_address
   -- will be hidden, and the block identified by block ID number.
   ipb_auto BIT NOT NULL DEFAULT 0,

   -- If set to 1, block applies only to logged-out users
   ipb_anon_only BIT NOT NULL DEFAULT 0,

   -- Block prevents account creation from matching IP addresses
   ipb_create_account BIT NOT NULL DEFAULT 1,

   -- Block triggers autoblocks
   ipb_enable_autoblock BIT NOT NULL DEFAULT 1,

   -- Time at which the block will expire.
   ipb_expiry DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

   -- Start and end of an address range, in hexadecimal
   -- Size chosen to allow IPv6
   ipb_range_start VARCHAR(32) NOT NULL DEFAULT '',
   ipb_range_end VARCHAR(32) NOT NULL DEFAULT '',
   -- Flag for entries hidden from users and Sysops
   ipb_deleted BIT NOT NULL DEFAULT 0,
   ipb_block_email BIT NOT NULL DEFAULT 0,
   ipb_allow_usertalk BIT NOT NULL DEFAULT 1
);
-- Unique index to support "user already blocked" messages
-- Any new options which prevent collisions should be included
--UNIQUE INDEX ipb_address (ipb_address(255), ipb_user, ipb_auto, ipb_anon_only),
CREATE UNIQUE INDEX /*i*/ipb_address   ON /*_*/ipblocks2(ipb_address, ipb_user, ipb_auto, ipb_anon_only);
CREATE        INDEX /*i*/ipb_user      ON /*_*/ipblocks2(ipb_user);
CREATE        INDEX /*i*/ipb_range     ON /*_*/ipblocks2(ipb_range_start, ipb_range_end);
CREATE        INDEX /*i*/ipb_timestamp ON /*_*/ipblocks2(ipb_timestamp);
CREATE        INDEX /*i*/ipb_expiry    ON /*_*/ipblocks2(ipb_expiry);
;

-- This is the easiest way to work around the CHAR(15) timestamp hack without modifying PHP code
CREATE VIEW /*_*/ipblocks AS
SELECT
   CONVERT(INT, ipb_id) AS ipb_id,
   ipb_address, ipb_user, ipb_by, ipb_by_text, ipb_reason,
   CONVERT(VARCHAR(8), ipb_timestamp, 112)
      + SUBSTRING(CONVERT(VARCHAR, ipb_timestamp, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, ipb_timestamp, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, ipb_timestamp, 114), 7, 2) AS ipb_timestamp,
   ipb_auto, ipb_anon_only, ipb_create_account, ipb_enable_autoblock,
   CONVERT(VARCHAR(8), ipb_expiry, 112)
      + SUBSTRING(CONVERT(VARCHAR, ipb_expiry, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, ipb_expiry, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, ipb_expiry, 114), 7, 2) AS ipb_expiry,
   ipb_range_start, ipb_range_end, ipb_deleted, ipb_block_email, ipb_allow_usertalk
FROM /*_*/ipblocks2
;

CREATE TRIGGER /*_*/ipblocks_INSERT ON /*_*/ipblocks
INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO /*_*/ipblocks2
   SELECT
      ipb_address,
      ISNULL(ipb_user, 0),
      ISNULL(ipb_by, 0),
      ISNULL(ipb_by_text, ''),
      ipb_reason,
      ISNULL(CONVERT(DATETIME, SUBSTRING(ipb_timestamp, 1, 8)
      + ' ' + SUBSTRING(ipb_timestamp, 9, 2)
      + ':' + SUBSTRING(ipb_timestamp, 11, 2)
      + ':' + SUBSTRING(ipb_timestamp, 13, 2)), getdate()),
      ISNULL(ipb_auto, 0),
      ISNULL(ipb_anon_only, 0),
      ISNULL(ipb_create_account, 1),
      ISNULL(ipb_enable_autoblock, 1),
      ISNULL(CONVERT(DATETIME, SUBSTRING(ipb_expiry, 1, 8)
      + ' ' + SUBSTRING(ipb_expiry, 9, 2)
      + ':' + SUBSTRING(ipb_expiry, 11, 2)
      + ':' + SUBSTRING(ipb_expiry, 13, 2)), getdate()),
      ISNULL(ipb_range_start, ''),
      ISNULL(ipb_range_end, ''),
      ISNULL(ipb_deleted, 0),
      ISNULL(ipb_block_email, 0),
      ISNULL(ipb_allow_usertalk, 0)
    FROM INSERTED
END
;

-- TODO: Update query for IPBLOCKS

--
-- Uploaded images and other files.
CREATE TABLE /*_*/image (
   -- Filename.
   -- This is also the title of the associated description page,
   -- which will be in namespace 6 (NS_IMAGE).
   img_name VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- File size in bytes.
   img_size INT  NOT NULL DEFAULT 0,

   -- For images, size in pixels.
   img_width INT NOT NULL DEFAULT 0,
   img_height INT NOT NULL DEFAULT 0,

   -- Extracted EXIF metadata stored as a serialized PHP array.
   img_metadata TEXT NOT NULL, -- was MEDIUMBLOB

   -- For images, BITs per pixel if known.
   img_bits INT NOT NULL DEFAULT 0,

   -- Media type as defined by the MEDIATYPE_xxx constants
   img_media_type VARCHAR(11) DEFAULT 'UNKNOWN',

   -- major part of a MIME media type as defined by IANA
   -- see http://www.iana.org/assignments/media-types/
   img_major_mime VARCHAR(11) DEFAULT 'UNKNOWN',

   -- minor part of a MIME media type as defined by IANA
   -- the minor parts are not required to adher to any standard
   -- but should be consistent throughout the database
   -- see http://www.iana.org/assignments/media-types/
   img_minor_mime VARCHAR(100) NOT NULL DEFAULT 'unknown',

   -- Description field as entered by the uploader.
   -- This is displayed in image upload history and logs.
   img_description VARCHAR(4096) NOT NULL,

   -- user_id and user_name of uploader.
   img_user INT NOT NULL DEFAULT 0,
   img_user_text VARCHAR(255) NOT NULL DEFAULT '',

   -- Time of the upload.
   img_timestamp VARCHAR(14) NOT NULL DEFAULT CONVERT(VARCHAR(8), CURRENT_TIMESTAMP, 112)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 7, 2),

   img_sha1 VARCHAR(32) NULL,
   CONSTRAINT /*_*/img_name PRIMARY KEY (img_name)
);
CREATE INDEX /*i*/img_usertext_timestamp ON /*_*/image (img_user_text,img_timestamp);
-- Used by Special:Imagelist for sort-by-size
CREATE INDEX /*i*/img_size ON /*_*/image(img_size);
-- Used by Special:Newimages and Special:Imagelist
CREATE INDEX /*i*/img_timestamp ON /*_*/image(img_timestamp);
CREATE INDEX /*i*/img_sha1 ON /*_*/image(img_sha1);
;
--ENUM("UNKNOWN", "BITMAP", "DRAWING", "AUDIO", "VIDEO", "MULTIMEDIA", "OFFICE", "TEXT", "EXECUTABLE", "ARCHIVE") DEFAULT NULL,
--ENUM("unknown", "application", "audio", "image", "text", "video", "message", "model", "multipart") NOT NULL DEFAULT "unknown",

--
-- Previous revisions of uploaded files.
-- Awkwardly, image rows have to be moved into
-- this table at re-upload time.
--
CREATE TABLE /*_*/oldimage (
   -- Base filename: key to image.img_name
   oi_name VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- Filename of the archived file.
   -- This is generally a timestamp and '!' prepended to the base name.
   oi_archive_name VARCHAR(255) NOT NULL DEFAULT '',

   -- Other fields as in image...
   oi_size INT NOT NULL DEFAULT 0,
   oi_width INT NOT NULL DEFAULT 0,
   oi_height INT NOT NULL DEFAULT 0,
   oi_bits INT NOT NULL DEFAULT 0,
   oi_description VARCHAR(255) NOT NULL,
   oi_user INT NOT NULL DEFAULT 0,
   oi_user_text VARCHAR(255) NOT NULL DEFAULT '',
   oi_timestamp VARCHAR(14) NOT NULL DEFAULT CONVERT(VARCHAR(8), CURRENT_TIMESTAMP, 112)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 7, 2),
   oi_metadata TEXT,
   oi_media_type VARCHAR(11) DEFAULT 'UNKNOWN',
   oi_major_mime VARCHAR(11) NOT NULL DEFAULT 'UNKNOWN',
   oi_minor_mime VARCHAR(100) NOT NULL DEFAULT 'unknown',
   oi_deleted BIT NOT NULL DEFAULT 0,
   oi_sha1 VARCHAR(32) NULL,

   CONSTRAINT /*_*/pk_oi PRIMARY KEY (oi_name, oi_timestamp),
);
CREATE INDEX /*i*/oi_usertext_timestamp ON /*_*/oldimage(oi_user_text,oi_timestamp);
CREATE INDEX /*i*/oi_name_timestamp ON /*_*/oldimage(oi_name, oi_timestamp);
CREATE INDEX /*i*/oi_name_archive_name ON /*_*/oldimage(oi_name,oi_archive_name);
CREATE INDEX /*i*/oi_sha1 ON /*_*/oldimage(oi_sha1);
;
--
-- Record of deleted file data
--
CREATE TABLE /*_*/filearchive (
   -- Unique row id
   fa_id INT NOT NULL IDENTITY,

   -- Original base filename; key to image.img_name, page.page_title, etc
   fa_name VARCHAR(255)  NOT NULL DEFAULT '',

   -- Filename of archived file, if an old revision
   fa_archive_name VARCHAR(255)  DEFAULT '',

   -- Which storage bin (directory tree or object store) the file data
   -- is stored in. Should be 'deleted' for files that have been deleted;
   -- any other bin is not yet in use.
   fa_storage_group VARCHAR(16),

   -- SHA-1 of the file contents plus extension, used as a key for storage.
   -- eg 8f8a562add37052a1848ff7771a2c515db94baa9.jpg
   --
   -- If NULL, the file was missing at deletion time or has been purged
   -- from the archival storage.
   fa_storage_key VARCHAR(64)  DEFAULT '',

   -- Deletion information, if this file is deleted.
   fa_deleted_user INT,
   fa_deleted_timestamp VARCHAR(14) DEFAULT NULL,
   fa_deleted_reason VARCHAR(255),

   -- Duped fields from image
   fa_size INT  DEFAULT 0,
   fa_width INT DEFAULT 0,
   fa_height INT DEFAULT 0,
   fa_metadata TEXT, -- was mediumblob
   fa_bits INT DEFAULT 0,
   fa_media_type VARCHAR(11) DEFAULT NULL,
   fa_major_mime VARCHAR(11) DEFAULT 'unknown',
   fa_minor_mime VARCHAR(100) DEFAULT 'unknown',
   fa_description VARCHAR(255),
   fa_user INT DEFAULT 0,
   fa_user_text VARCHAR(255) DEFAULT '',
   fa_timestamp VARCHAR(14) DEFAULT CONVERT(VARCHAR(8), CURRENT_TIMESTAMP, 112)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 7, 2),
   -- Visibility of deleted revisions, bitfield
   fa_deleted BIT NOT NULL DEFAULT 0,

   CONSTRAINT /*_*/fa_id PRIMARY KEY (fa_id),
);
-- ENUM("UNKNOWN", "BITMAP", "DRAWING", "AUDIO", "VIDEO", "MULTIMEDIA", "OFFICE", "TEXT", "EXECUTABLE", "ARCHIVE")
-- ENUM("unknown", "application", "audio", "image", "text", "video", "message", "model", "multipart")
-- Pick by image name
CREATE INDEX /*i*/fa_name ON /*_*/filearchive (fa_name, fa_timestamp);
-- pick out dupe files
CREATE INDEX /*i*/fa_storage_group ON /*_*/filearchive (fa_storage_group, fa_storage_key);
-- sort by deletion time
CREATE INDEX /*i*/fa_deleted_timestamp ON /*_*/filearchive (fa_deleted_timestamp);
-- sort by uploader
CREATE INDEX /*i*/fa_user_timestamp ON /*_*/filearchive (fa_user_text,fa_timestamp);
;
--
-- Primarily a summary table for Special:Recentchanges,
-- this table contains some additional info on edits from
-- the last few days, see Article::editUpdates()
--
CREATE TABLE /*_*/recentchanges2 (
   rc_id INT NOT NULL IDENTITY PRIMARY KEY,
   rc_timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
   rc_cur_time DATETIME DEFAULT CURRENT_TIMESTAMP,

   -- As in revision
   rc_user INT DEFAULT 0,
   rc_user_text VARCHAR(255) DEFAULT '',

   -- When pages are renamed, their RC entries do _not_ change.
   rc_namespace INT DEFAULT 0,
   rc_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS DEFAULT '',

   -- as in revision...
   rc_comment VARCHAR(255) DEFAULT '',
   rc_minor BIT DEFAULT 0,

   -- Edits by user accounts with the 'bot' rights key are
   -- marked with a 1 here, and will be hidden from the
   -- DEFAULT view.
   rc_bot BIT DEFAULT 0,

   rc_new BIT DEFAULT 0,

   -- Key to page_id (was cur_id prior to 1.5).
   -- This will keep links working after moves while
   -- retaining the at-the-time name in the changes list.
   rc_cur_id INT DEFAULT 0,

   -- rev_id of the given revision
   rc_this_oldid INT DEFAULT 0,

   -- rev_id of the prior revision, for generating diff links.
   rc_last_oldid INT DEFAULT 0,

   -- These may no longer be used, with the new move log.
   rc_type tinyint DEFAULT 0,
   rc_moved_to_ns BIT DEFAULT 0,
   rc_moved_to_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS DEFAULT '',

   -- If the Recent Changes Patrol option is enabled,
   -- users may mark edits as having been reviewed to
   -- remove a warning flag ON the RC list.
   -- A value of 1 indicates the page has been reviewed.
   rc_patrolled BIT DEFAULT 0,

   -- Recorded IP address the edit was made from, if the
   -- $wgPutIPinRC option is enabled.
   rc_ip CHAR(15) DEFAULT '',

   -- TEXT length in characters before
   -- and after the edit
   rc_old_len INT DEFAULT 0,
   rc_new_len INT DEFAULT 0,
   -- Visibility of deleted revisions, BITfield
   rc_deleted BIT DEFAULT 0,

   -- Value corresonding to log_id, specific log entries
   rc_logid INT DEFAULT 0,
   -- Store log type info here, or null
   rc_log_type VARCHAR(255) NULL DEFAULT NULL,
   -- Store log action or null
   rc_log_action VARCHAR(255) NULL DEFAULT NULL,
   -- Log params
   rc_params VARCHAR(8000) DEFAULT '',
);
CREATE INDEX /*i*/rc_timestamp       ON /*_*/recentchanges2(rc_timestamp);
CREATE INDEX /*i*/rc_namespace_title ON /*_*/recentchanges2(rc_namespace, rc_title);
CREATE INDEX /*i*/rc_cur_id          ON /*_*/recentchanges2(rc_cur_id);
CREATE INDEX /*i*/new_name_timestamp ON /*_*/recentchanges2(rc_new,rc_namespace,rc_timestamp);
CREATE INDEX /*i*/rc_ip              ON /*_*/recentchanges2(rc_ip);
CREATE INDEX /*i*/rc_ns_usertext     ON /*_*/recentchanges2(rc_namespace, rc_user_text);
CREATE INDEX /*i*/rc_user_text       ON /*_*/recentchanges2(rc_user_text, rc_timestamp);
;


-- This is the easiest way to work around the CHAR(15) timestamp hack without modifying PHP code
CREATE VIEW /*_*/recentchanges AS
SELECT
   CONVERT(INT, rc_id) AS rc_id,
   CONVERT(VARCHAR(8), rc_timestamp, 112)
      + SUBSTRING(CONVERT(VARCHAR, rc_timestamp, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, rc_timestamp, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, rc_timestamp, 114), 7, 2) AS rc_timestamp,
   CONVERT(VARCHAR(14), rc_cur_time, 112)
      + SUBSTRING(CONVERT(VARCHAR, rc_cur_time, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, rc_cur_time, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, rc_cur_time, 114), 7, 2) AS rc_cur_time,
   rc_user, rc_user_text, rc_namespace, rc_title, rc_comment, rc_minor,
   rc_bot, rc_new, rc_cur_id, rc_this_oldid, rc_last_oldid, rc_type, rc_moved_to_ns,
   rc_moved_to_title, rc_patrolled, rc_ip, rc_old_len, rc_new_len, rc_deleted,
   rc_logid, rc_log_type, rc_log_action, rc_params
FROM /*_*/recentchanges2
;


CREATE TRIGGER /*_*/recentchanges_INSERT ON /*_*/recentchanges
INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO /*_*/recentchanges2
   SELECT
      ISNULL(CONVERT(DATETIME, SUBSTRING(rc_timestamp, 1, 8)
      + ' ' + SUBSTRING(rc_timestamp, 9, 2)
      + ':' + SUBSTRING(rc_timestamp, 11, 2)
      + ':' + SUBSTRING(rc_timestamp, 13, 2)), getdate()),
      ISNULL(CONVERT(DATETIME, SUBSTRING(rc_cur_time, 1, 8)
      + ' ' + SUBSTRING(rc_cur_time, 9, 2)
      + ':' + SUBSTRING(rc_cur_time, 11, 2)
      + ':' + SUBSTRING(rc_cur_time, 13, 2)), getdate()),
      ISNULL(rc_user, 0),
      ISNULL(rc_user_text, ''),
      ISNULL(rc_namespace, 1),
      ISNULL(rc_title, ''),
      ISNULL(rc_comment, ''),
      ISNULL(rc_minor, ''),
      ISNULL(rc_bot, 0),
      ISNULL(rc_new, 0),
      ISNULL(rc_cur_id, 0),
      ISNULL(rc_this_oldid, 0),
      ISNULL(rc_last_oldid, 0),
      ISNULL(rc_type, 0),
      ISNULL(rc_moved_to_ns, 0),
      ISNULL(rc_moved_to_title, ''),
      ISNULL(rc_patrolled, 0),
      ISNULL(rc_ip, ''),
      ISNULL(rc_old_len, 0),
      ISNULL(rc_new_len, 0),
      ISNULL(rc_deleted, 0),
      ISNULL(rc_logid, 0),
      rc_log_type, rc_log_action,
      ISNULL(rc_params, '')
   FROM INSERTED
END
;

CREATE TRIGGER /*_*/recentchanges_UPDATE on /*_*/recentchanges
INSTEAD OF UPDATE
AS
BEGIN
   DECLARE @old_id INT
   DECLARE @new_timestamp DATETIME
   DECLARE @new_cur_time DATETIME
   DECLARE @new_user INT
   DECLARE @new_user_text VARCHAR(255)
   DECLARE @new_namespace INT
   DECLARE @new_title VARCHAR(255)
   DECLARE @new_comment VARCHAR(255)
   DECLARE @new_minor BIT
   DECLARE @new_bot BIT
   DECLARE @new_new BIT
   DECLARE @new_cur_id INT
   DECLARE @new_this_oldid INT
   DECLARE @new_last_oldid INT
   DECLARE @new_type TINYINT
   DECLARE @new_moved_to_ns BIT
   DECLARE @new_moved_to_title VARCHAR(255)
   DECLARE @new_patrolled BIT
   DECLARE @new_ip CHAR(15)
   DECLARE @new_old_len INT
   DECLARE @new_new_len INT
   DECLARE @new_deleted BIT
   DECLARE @new_logid INT
   DECLARE @new_log_type VARCHAR(255)
   DECLARE @new_log_action VARCHAR(255)
   DECLARE @new_params VARCHAR(8000)
   SELECT @old_id = rc_id FROM DELETED
   SELECT @new_timestamp =
      CONVERT(DATETIME, SUBSTRING(rc_timestamp, 1, 8)
      + ' ' + SUBSTRING(rc_timestamp, 9, 2)
      + ':' + SUBSTRING(rc_timestamp, 11, 2)
      + ':' + SUBSTRING(rc_timestamp, 13, 2)) FROM INSERTED
   SELECT @new_cur_time =
      CONVERT(DATETIME, SUBSTRING(rc_cur_time, 1, 8)
      + ' ' + SUBSTRING(rc_cur_time, 9, 2)
      + ':' + SUBSTRING(rc_cur_time, 11, 2)
      + ':' + SUBSTRING(rc_cur_time, 13, 2)) FROM INSERTED
   SELECT @new_user = rc_user FROM INSERTED
   SELECT @new_user_text = rc_user_text FROM INSERTED
   SELECT @new_namespace = rc_namespace FROM INSERTED
   SELECT @new_title = rc_title FROM INSERTED
   SELECT @new_comment = rc_comment FROM INSERTED
   SELECT @new_minor = rc_minor FROM INSERTED
   SELECT @new_bot = rc_bot FROM INSERTED
   SELECT @new_new = rc_new FROM INSERTED
   SELECT @new_cur_id = rc_cur_id FROM INSERTED
   SELECT @new_this_oldid = rc_this_oldid FROM INSERTED
   SELECT @new_last_oldid = rc_last_oldid FROM INSERTED
   SELECT @new_type = rc_type FROM INSERTED
   SELECT @new_moved_to_ns = rc_moved_to_ns FROM INSERTED
   SELECT @new_moved_to_title = rc_moved_to_title FROM INSERTED
   SELECT @new_patrolled = rc_patrolled FROM INSERTED
   SELECT @new_ip = rc_ip FROM INSERTED
   SELECT @new_old_len = rc_old_len FROM INSERTED
   SELECT @new_new_len = rc_new_len FROM INSERTED
   SELECT @new_deleted = rc_deleted FROM INSERTED
   SELECT @new_logid = rc_logid FROM INSERTED
   SELECT @new_log_type = rc_log_type FROM INSERTED
   SELECT @new_log_action = rc_log_action FROM INSERTED
   SELECT @new_params = rc_params FROM INSERTED
   UPDATE /*_*/recentchanges2 SET
      rc_timestamp = @new_timestamp,
      rc_cur_time = @new_cur_time,
      rc_user = @new_user,
      rc_user_text = @new_user_text,
      rc_namespace = @new_namespace,
      rc_title = @new_title,
      rc_comment = @new_comment,
      rc_minor = @new_minor,
      rc_bot = @new_bot,
      rc_new = @new_new,
      rc_cur_id = @new_cur_id,
      rc_this_oldid = @new_this_oldid,
      rc_last_oldid = @new_last_oldid,
      rc_type = @new_type,
      rc_moved_to_ns = @new_moved_to_ns,
      rc_moved_to_title = @new_moved_to_title,
      rc_patrolled = @new_patrolled,
      rc_ip = @new_ip,
      rc_old_len = @new_old_len,
      rc_new_len = @new_new_len,
      rc_deleted = @new_deleted,
      rc_logid = @new_logid,
      rc_log_type = @new_log_type,
      rc_log_action = @new_log_action,
      rc_params = @new_params
   WHERE rc_id = @old_id
END
;

CREATE TABLE /*_*/watchlist (
   -- Key to user.user_id
   wl_user INT NOT NULL,

   -- Key to page_namespace/page_title
   -- Note that users may watch pages which do not exist yet,
   -- or existed in the past but have been deleted.
   wl_namespace INT NOT NULL DEFAULT 0,
   wl_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- Timestamp when user was last sent a notification e-mail;
   -- cleared when the user visits the page.
   wl_notificationtimestamp VARCHAR(14) DEFAULT NULL,

   CONSTRAINT /*_*/watchlist_pk PRIMARY KEY (wl_user, wl_namespace, wl_title)
);
CREATE UNIQUE INDEX /*i*/wl_user ON /*_*/watchlist (wl_user, wl_namespace, wl_title);
CREATE INDEX /*i*/namespace_title ON /*_*/watchlist (wl_namespace, wl_title);

--
-- Used by the math module to keep track
-- of previously-rendered items.
--
CREATE TABLE /*_*/math (
   -- BINARY MD5 hash of the latex fragment, used as an identifier key.
   math_inputhash VARCHAR(16) NOT NULL PRIMARY KEY,

   -- Not sure what this is, exactly...
   math_outputhash VARCHAR(16) NOT NULL,

   -- texvc reports how well it thinks the HTML conversion worked;
   -- if it's a low level the PNG rendering may be preferred.
   math_html_conservativeness tinyint NOT NULL,

   -- HTML output from texvc, if any
   math_html TEXT,

   -- MathML output from texvc, if any
   math_mathml TEXT,
);

-- Needs fulltext index.
CREATE TABLE /*_*/searchindex (
   -- Key to page_id
   si_page INT NOT NULL PRIMARY KEY,

   -- Munged version of title
   si_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- Munged version of body text
   si_text TEXT NOT NULL,

   --FULLTEXT si_title (si_title)
   --FULLTEXT si_text (si_text)

);
-- si_title and si_text want full TEXT indexes
CREATE INDEX /*i*/searchindex_title ON /*_*/searchindex(si_title);

--
-- Recognized INTerwiki link prefixes
--
CREATE TABLE /*_*/interwiki (
   -- The INTerwiki prefix, (e.g. "Meatball", or the language prefix "de")
   iw_prefix CHAR(32) NOT NULL PRIMARY KEY,

   -- The URL of the wiki, with "$1" as a placeholder for an article name.
   -- Any spaces in the name will be transformed to underscores before
   -- insertion.
   iw_url CHAR(127) NOT NULL,

   -- A boolean value indicating whether the wiki is in this project
   -- (used, for example, to detect redirect loops)
   iw_local BIT NOT NULL,

   -- Boolean value indicating whether INTerwiki transclusions are allowed.
   iw_trans BIT NOT NULL DEFAULT 0,
);

--
-- Used for caching expensive grouped queries
--
CREATE TABLE /*_*/querycache (
   -- A key name, generally the base name of of the special page.
   qc_type      CHAR(32)  NOT NULL,

   -- Some sort of stored value. Sizes, counts...
   qc_value     INT       NOT NULL DEFAULT '0',

   -- Target namespace+title
   qc_namespace INT       NOT NULL DEFAULT 0,
   qc_title     CHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/qc_pk PRIMARY KEY (qc_type,qc_value)
);

--
-- For a few generic cache operations if not using Memcached
--
CREATE TABLE /*_*/objectcache (
   keyname VARCHAR(255) NOT NULL DEFAULT '',
   [value] NVARCHAR(MAX), --NVARCHAR(3766), -- IMAGE,
   exptime VARCHAR(14), -- This is treated as a DATETIME
);
CREATE CLUSTERED INDEX /*i*/objectcache_time ON /*_*/objectcache(exptime);
CREATE UNIQUE INDEX /*i*/objectcache_PK ON /*wgDBprefix*/objectcache(keyname);
--
-- Cache of INTerwiki transclusion
--
CREATE TABLE /*_*/transcache (
   tc_url      VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL PRIMARY KEY,
   tc_contents TEXT,
   tc_time     DATETIME NOT NULL,
);

CREATE TABLE /*_*/logging2 (
   -- Symbolic keys for the general log type and the action type
   -- within the log. The output format will be controlled by the
   -- action field, but only the type controls categorization.
   log_id INT IDENTITY PRIMARY KEY,
   log_type VARCHAR(32) NOT NULL DEFAULT '',
   log_action VARCHAR(32) NOT NULL DEFAULT '',

   -- Timestamp. Duh.
   log_timestamp VARCHAR(14) NOT NULL DEFAULT '19700101000000',

   -- The user who performed this action; key to user_id
   log_user INT NOT NULL DEFAULT 0,
 
   -- Name of the user who performed this action
   log_user_text VARCHAR(255) NOT NULL DEFAULT '',
  
   -- Key to the page affected. Where a user is the target,
   -- this will point to the user page.
   log_namespace INT NOT NULL DEFAULT 0,
   log_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',
   log_page INT NULL,
  
   -- Freeform text. INTerpreted as edit history comments.
   log_comment VARCHAR(255) NOT NULL DEFAULT '',

   -- LF separated list of miscellaneous parameters
   log_params VARCHAR(8000) NOT NULL,
   -- rev_deleted for logs
   log_deleted BIT DEFAULT 0
);
CREATE INDEX /*i*/type_time ON /*_*/logging2 (log_type, log_timestamp);
CREATE INDEX /*i*/user_time ON /*_*/logging2 (log_user, log_timestamp);
CREATE INDEX /*i*/page_time ON /*_*/logging2 (log_namespace, log_title, log_timestamp);
CREATE INDEX /*i*/times ON /*_*/logging2 (log_timestamp);
CREATE INDEX /*i*/log_user_type_time ON /*_*/logging2 (log_user, log_type, log_timestamp);
CREATE INDEX /*i*/log_page_id_time ON /*_*/logging2 (log_page,log_timestamp);
;
CREATE VIEW /*_*/logging
AS
   SELECT
   CONVERT(INT, log_id) AS log_id,
   log_type,
   log_action,
   CONVERT(VARCHAR(14), log_timestamp, 112)
      + SUBSTRING(CONVERT(VARCHAR, log_timestamp, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, log_timestamp, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, log_timestamp, 114), 7, 2) AS log_timestamp,
   log_user,
   log_user_text,
   log_namespace,
   log_title,
   log_page,
   CONVERT(VARCHAR(512), log_comment) AS log_comment,
   log_params,
   log_deleted
FROM /*_*/logging2
;
CREATE TRIGGER /*_*/logging_INSERT ON /*_*/logging
   INSTEAD OF INSERT
AS
BEGIN
   INSERT INTO [logging2]
   SELECT
      ISNULL(LEFT(log_type, 10), ''),
      ISNULL(LEFT(log_action, 10), ''),
      ISNULL(log_timestamp, '1970-01-01 00:00:00'),
      ISNULL(log_user, 0),
      ISNULL(log_user_text, ''),
      ISNULL(log_namespace, 0),
      ISNULL(LEFT(log_title, 255), ''),
      ISNULL(log_page, 0),
      ISNULL(LEFT(log_comment, 255), ''),
      ISNULL(log_params, ''),
      ISNULL(log_deleted, 0)
   FROM INSERTED
END
;

CREATE TRIGGER /*_*/logging_UPDATE ON /*_*/logging
INSTEAD OF UPDATE
AS
BEGIN
   DECLARE @old_id INT -- This is the PRIMARY KEY
   DECLARE @new_type CHAR(10)
   DECLARE @new_action CHAR(10)
   DECLARE @new_timestamp VARCHAR(14)
   DECLARE @new_user INT
   DECLARE @new_user_text VARCHAR(255)
   DECLARE @new_namespace INT
   DECLARE @new_title VARCHAR(255)
   DECLARE @new_page INT
   DECLARE @new_comment VARCHAR(255)
   DECLARE @new_params VARCHAR(8000)
   DECLARE @new_deleted BIT
   SELECT @old_id = log_id FROM DELETED
   SELECT @new_type = log_type FROM INSERTED
   SELECT @new_action = log_action FROM INSERTED
   SELECT @new_timestamp = log_timestamp FROM INSERTED
   SELECT @new_user = log_user FROM INSERTED
   SELECT @new_user_text = log_user_text FROM INSERTED
   SELECT @new_namespace = log_namespace FROM INSERTED
   SELECT @new_title = log_title FROM INSERTED
   SELECT @new_page = log_page FROM INSERTED
   SELECT @new_comment = log_comment FROM INSERTED
   SELECT @new_params = log_params FROM INSERTED
   SELECT @new_deleted = log_deleted FROM INSERTED
   UPDATE /*_*/logging2 SET
      log_type = @new_type,
      log_action = @new_action,
      log_timestamp = @new_timestamp,
      log_user = @new_user,
      log_user_text = @new_user_text,
      log_namespace = @new_namespace,
      log_title = @new_title,
      log_page = @new_page,
      log_comment = @new_comment,
      log_params = @new_params,
      log_deleted = @new_deleted
   WHERE log_id = @old_id
END
;


CREATE TABLE /*_*/log_search (
  -- The type of ID (rev ID, log ID, rev timestamp, username)
  ls_field VARCHAR(32) NOT NULL,
  -- The value of the ID
  ls_value VARCHAR(255) NOT NULL,
  -- Key to log_id
  ls_log_id int NOT NULL DEFAULT 0,
   CONSTRAINT /*_*/pk_log_search PRIMARY KEY(ls_field,ls_value,ls_log_id),

) /*$wgDBTableOptions*/;
--CREATE UNIQUE INDEX /*i*/ls_field_val ON /*_*/log_search (ls_field,ls_value,ls_log_id);
CREATE INDEX /*i*/ls_log_id ON /*_*/log_search (ls_log_id);


CREATE TABLE /*_*/trackbacks (
   tb_id    INT IDENTITY PRIMARY KEY,
   tb_page  INT REFERENCES /*_*/page2(page_id) ON DELETE CASCADE,
   tb_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,
   tb_url   VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,
   tb_ex    TEXT,
   tb_name  VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS
);
CREATE INDEX /*i*/tb_page ON /*_*/trackbacks(tb_page);

-- Jobs performed by parallel apache threads or a command-line daemon
CREATE TABLE /*_*/job (
   job_id INT NOT NULL IDENTITY PRIMARY KEY,

  -- Command name
  -- Limited to 60 to prevent key length overflow
   job_cmd VARCHAR(60) NOT NULL DEFAULT '',

   -- Namespace and title to act on
   -- Should be 0 and '' if the command does not operate ON a title
   job_namespace INT NOT NULL,
   job_title VARCHAR(255) NOT NULL,

   -- Any other parameters to the command
   -- Presently unused, format undefined
   job_params VARCHAR(255) NOT NULL,
);
CREATE INDEX /*i*/job_idx ON /*_*/job(job_cmd,job_namespace,job_title);

-- Details of updates to cached special pages
CREATE TABLE /*_*/querycache_info (
   -- Special page name
   -- Corresponds to a qc_type value
   qci_type VARCHAR(32) NOT NULL DEFAULT '' PRIMARY KEY,

   -- Timestamp of last update
   qci_timestamp VARCHAR(14) NOT NULL DEFAULT '19700101000000',
);

-- For each redirect, this table contains exactly one row defining its target
CREATE TABLE /*_*/redirect (
   -- Key to the page_id of the redirect page
   rd_from INT NOT NULL DEFAULT 0,

   -- Key to page_namespace/page_title of the target page.
   -- The target page may or may not exist, and due to renames
   -- and deletions may refer to different page records as time
   -- goes by.
   rd_namespace INT NOT NULL DEFAULT '0',
   rd_title VARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',
   rd_interwiki VARCHAR(32) DEFAULT NULL,
   rd_fragment VARCHAR(255) DEFAULT NULL,
   CONSTRAINT /*_*/pk_redirect PRIMARY KEY(rd_namespace,rd_title,rd_from),
  );
--CREATE UNIQUE INDEX /*i*/rd_ns_title ON /*_*/redirect(rd_namespace,rd_title,rd_from);

-- Used for caching expensive grouped queries that need two links (for example double-redirects)
CREATE TABLE /*_*/querycachetwo (
   -- A key name, generally the base name of of the special page.
   qcc_type CHAR(32) NOT NULL,

   -- Some sort of stored value. Sizes, counts...
   qcc_value INT NOT NULL DEFAULT 0,

   -- Target namespace+title
   qcc_namespace INT NOT NULL DEFAULT 0,
   qcc_title CHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   -- Target namespace+title2
   qcc_namespacetwo INT NOT NULL DEFAULT 0,
   qcc_titletwo CHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL DEFAULT '',

   CONSTRAINT /*_*/qcc_type PRIMARY KEY(qcc_type,qcc_value),
);
CREATE UNIQUE INDEX /*i*/qcc_title    ON /*_*/querycachetwo(qcc_type,qcc_namespace,qcc_title);
CREATE UNIQUE INDEX /*i*/qcc_titletwo ON /*_*/querycachetwo(qcc_type,qcc_namespacetwo,qcc_titletwo);

CREATE TABLE /*_*/mediawiki_version (
   type        VARCHAR(255) NOT NULL,
   mw_version  VARCHAR(255) NOT NULL,
   notes       VARCHAR(255) NULL,
   pg_version  VARCHAR(255) NULL,
   pg_dbname   VARCHAR(255) NULL,
   pg_user     VARCHAR(255) NULL,
   pg_port     VARCHAR(255) NULL,
   mw_schema   VARCHAR(255) NULL,
   ts2_schema  VARCHAR(255) NULL,
   ctype       VARCHAR(255) NULL,
   sql_version VARCHAR(255) NULL,
   sql_date    VARCHAR(255) NULL,
   cdate       VARCHAR(14) DEFAULT CONVERT(VARCHAR(14), CURRENT_TIMESTAMP, 112)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 1, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 4, 2)
      + SUBSTRING(CONVERT(VARCHAR, CURRENT_TIMESTAMP, 114), 7, 2)
    CONSTRAINT/*_*/mw_vers PRIMARY KEY(mw_version)
);

INSERT INTO /*_*/mediawiki_version(type, mw_version) VALUES('MW', '1.16');


--- Used for storing page restrictions (i.e. protection levels)
CREATE TABLE /*_*/page_restrictions (
   -- Page to apply restrictions to (Foreign Key to page).
   pr_page INT NOT NULL,
   -- The protection type (edit, move, etc)
   pr_type VARCHAR(255) NOT NULL,
   -- The protection level (Sysop, autoconfirmed, etc)
   pr_level VARCHAR(255) NOT NULL,
   -- Whether or not to cascade the protection down to pages transcluded.
   pr_cascade INT NOT NULL,
   -- Field for future support of per-user restriction.
   pr_user INT NULL,
   -- Field for time-limited protection.
   pr_expiry VARCHAR(14) NULL,
   -- Field for an ID for this restrictions row (sort-key for Special:ProtectedPages)
   pr_id INT IDENTITY,

   CONSTRAINT /*_*/pr_pagetype PRIMARY KEY(pr_page,pr_type),
);
CREATE INDEX /*i*/pr_page      ON /*_*/page_restrictions(pr_page);
CREATE INDEX /*i*/pr_typelevel ON /*_*/page_restrictions(pr_type,pr_level);
CREATE INDEX /*i*/pr_pagelevel ON /*_*/page_restrictions(pr_level);
CREATE INDEX /*i*/pr_cascade   ON /*_*/page_restrictions(pr_cascade);
;

-- Protected titles - nonexistent pages that have been protected
CREATE TABLE /*_*/protected_titles (
  pt_namespace INT NOT NULL,
  pt_title nVARCHAR(255) COLLATE SQL_Latin1_General_CP1_CS_AS NOT NULL,
  pt_user INT NOT NULL,
  pt_by INT  NOT NULL,
  pt_reason VARCHAR(255),
  pt_timestamp VARCHAR(14) NOT NULL,          -- actually a date/time
  pt_expiry VARCHAR(14) NOT NULL DEFAULT '',  -- actually a date/time
  pt_create_perm VARCHAR(60) NOT NULL,
  CONSTRAINT /*_*/[REDACTED]PRIMARY KEY(pt_namespace,pt_title),
);
CREATE UNIQUE INDEX /*i*/pt_namespace_title ON /*_*/protected_titles (pt_namespace,pt_title);
CREATE INDEX /*i*/pt_timestamp ON /*_*/protected_titles (pt_timestamp);
;
-- Name/value pairs indexed by page_id
CREATE TABLE /*_*/page_props (
  pp_page int NOT NULL,
  pp_propname VARCHAR(60) NOT NULL,
  pp_value VARCHAR(8000),
  CONSTRAINT /*_*/pk_page_props PRIMARY KEY(pp_page,pp_propname)
) /*$wgDBTableOptions*/;

CREATE TABLE /*_*/updatelog (
  ul_key nVARCHAR(50) NOT NULL,
  CONSTRAINT /*_*/pk_updatelog PRIMARY KEY (ul_key)
) /*$wgDBTableOptions*/;

CREATE TABLE /*_*/change_tag (
  ct_id    INT IDENTITY PRIMARY KEY,
  ct_rc_id INT NULL,
  ct_log_id INT NULL,
  ct_rev_id INT NULL,
  ct_tag nVARCHAR(255) NOT NULL,
  ct_params nVARCHAR(800) NULL
);

CREATE UNIQUE INDEX /*i*/change_tag_rc_tag ON /*_*/change_tag(ct_rc_id, ct_tag);
CREATE UNIQUE INDEX /*i*/change_tag_log_tag ON /*_*/change_tag(ct_log_id, ct_tag);
CREATE UNIQUE INDEX /*i*/change_tag_rev_tag ON /*_*/change_tag(ct_rev_id, ct_tag);
-- Covering index
CREATE INDEX /*i*/change_tag_tag_id ON /*_*/change_tag(ct_tag,ct_rc_id,ct_rev_id,ct_log_id);

-- Rollup table to pull a LIST of tags simply without ugly GROUP_CONCAT that only works on MySQL 4.1+
CREATE TABLE /*_*/tag_summary (
  ct_id    INT IDENTITY PRIMARY KEY,
  ts_rc_id INT NULL,
	ts_log_id INT NULL,
	ts_rev_id INT NULL,
	ts_tags VARCHAR(2048) NOT NULL
) /*$wgDBTableOptions*/;

CREATE UNIQUE INDEX /*i*/tag_summary_rc_id ON /*_*/tag_summary (ts_rc_id);
CREATE UNIQUE INDEX /*i*/tag_summary_log_id ON /*_*/tag_summary (ts_log_id);
CREATE UNIQUE INDEX /*i*/tag_summary_rev_id ON /*_*/tag_summary (ts_rev_id);


CREATE TABLE /*_*/valid_tag (
	vt_tag VARCHAR(255) NOT NULL PRIMARY KEY
);

-- Table for storing localisation data
CREATE TABLE /*_*/l10n_cache (
  -- Language code
  lc_lang NVARCHAR(32) NOT NULL,
  -- Cache key
  lc_key NVARCHAR(255) NOT NULL,
  -- Value
  lc_value NVARCHAR(4000) NULL,
  CONSTRAINT /*_*/pk_l10_cache PRIMARY KEY(lc_lang, lc_key)  
) /*$wgDBTableOptions*/;
CREATE INDEX /*i*/lc_lang_key ON /*_*/l10n_cache (lc_lang, lc_key);


CREATE TABLE /*_*/php_sessions (
  sessionid varchar(40) NOT NULL default '',
  expiry int NOT NULL default '0',
  value text NOT NULL,
PRIMARY KEY (sessionid)
);

--- Add the full-text capabilities
-- These steps are no longer applicaple with the use of Lucene-based search!
-- STEP 1: Enable Full Text Search for the database
--sp_fulltext_database 'enable';
-- STEP 2: Create a full-text catalog
--sp_fulltext_catalog 'WikiCatalog', 'create'
-- STEP 3: Create a full-text index for the table
--sp_fulltext_table /*_*/text, 'create', 'WikiCatalog', 'PK_Text'
-- STEP 4: Add the column to the table's full-text index
--sp_fulltext_column /*wgDBprefix*/text, 'old_text', 'add'
-- STEP 5: Activate the newly created full-text index
--sp_fulltext_table 'FTI_Wiki_Text', 'activate'
-- STEP 6: Populate the newly created full-text catalog
