-- rows, such as change_tag.
CREATE INDEX /*i*/ar_revid ON /*_*/archive (ar_rev_id);
+--
+-- Slots represent an n:m relation between revisions and content objects.
+-- A content object can have a specific "role" in one or more revisions.
+-- Each revision can have multiple content objects, each having a different role.
+--
+CREATE TABLE /*_*/slots (
+
+ -- reference to rev_id
+ slot_revision_id bigint unsigned NOT NULL,
+
+ -- reference to role_id
+ slot_role_id smallint unsigned NOT NULL,
+
+ -- reference to content_id
+ slot_content_id bigint unsigned NOT NULL,
+
+ -- whether the content is inherited (1) or new in this revision (0)
+ slot_inherited tinyint unsigned NOT NULL DEFAULT 0,
+
+ PRIMARY KEY ( slot_revision_id, slot_role_id )
+) /*$wgDBTableOptions*/;
+
+-- Index for finding revisions that modified a specific slot
+CREATE INDEX /*i*/slot_role_inherited ON /*_*/slots (slot_revision_id, slot_role_id, slot_inherited);
+
+--
+-- The content table represents content objects. It's primary purpose is to provide the necessary
+-- meta-data for loading and interpreting a serialized data blob to create a content object.
+--
+CREATE TABLE /*_*/content (
+
+ -- ID of the content object
+ content_id bigint unsigned PRIMARY KEY AUTO_INCREMENT,
+
+ -- Nominal size of the content object (not necessarily of the serialized blob)
+ content_size int unsigned NOT NULL,
+
+ -- Nominal hash of the content object (not necessarily of the serialized blob)
+ content_sha1 varbinary(32) NOT NULL,
+
+ -- reference to model_id
+ content_model smallint unsigned NOT NULL,
+
+ -- URL-like address of the content blob
+ content_address varbinary(255) NOT NULL
+) /*$wgDBTableOptions*/;
+
+--
+-- Normalization table for role names
+--
+CREATE TABLE /*_*/slot_roles (
+ role_id smallint PRIMARY KEY AUTO_INCREMENT,
+ role_name varbinary(64) NOT NULL
+) /*$wgDBTableOptions*/;
+
+-- Index for looking of the internal ID of for a name
+CREATE UNIQUE INDEX /*i*/role_name ON /*_*/slot_roles (role_name);
+
+--
+-- Normalization table for content model names
+--
+CREATE TABLE /*_*/content_models (
+ model_id smallint PRIMARY KEY AUTO_INCREMENT,
+ model_name varbinary(64) NOT NULL
+) /*$wgDBTableOptions*/;
+
+-- Index for looking of the internal ID of for a name
+CREATE UNIQUE INDEX /*i*/model_name ON /*_*/content_models (model_name);
--
-- Track page-to-page hyperlinks within the wiki.