Daniel Kinzler has uploaded a new change for review. ( https://gerrit.wikimedia.org/r/378724 )
Change subject: [WIP] first shot at MCR database schema ...................................................................... [WIP] first shot at MCR database schema Bug: T174028 Change-Id: I30a3a9834d54d0e6957553d91908b2b73b2c802f --- M maintenance/tables.sql 1 file changed, 86 insertions(+), 0 deletions(-) git pull ssh://gerrit.wikimedia.org:29418/mediawiki/core refs/changes/24/378724/1 diff --git a/maintenance/tables.sql b/maintenance/tables.sql index 1813f6c..37c4dc5 100644 --- a/maintenance/tables.sql +++ b/maintenance/tables.sql @@ -611,6 +611,92 @@ -- 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 ( + -- The page this slot belongs to; reference to page_id + -- TODO: decide if we need this (for sharding, analysis, and recovery) + -- TODO: bigint? + slot_page int unsigned NOT NULL, + + -- reference to rev_id + slot_revision bigint unsigned NOT NULL, + + -- reference to role_id + slot_role smallint unsigned NOT NULL, + + -- reference to content_id + slot_content 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_page, slot_revision, slot_role ) +) /*$wgDBTableOptions*/; + +-- Index for finding revisions that modified a specific slot +CREATE INDEX /*i*/slot_page_role_inherited ON /*_*/slots (slot_page, slot_role, slot_inherited); + +-- Index for finding content usage (and thus detecting orphan content rows) +CREATE INDEX /*i*/slot_content ON /*_*/slots (slot_page, slot_content); + +-- +-- The content table represents content objects. It's primary purpose is to provide the necessary +-- meta-data for loading and interpreting a serialized data blob to create a content object. +-- +CREATE TABLE /*_*/content ( + -- The page this slot belongs to; reference to page_id + -- TODO: decide if we need this (for sharding, analysis, and recovery) + -- TODO: bigint? + content_page int unsigned NOT NULL, + + -- ID of the content object + content_id bigint unsigned NOT NULL AUTO_INCREMENT, + + -- Nominal size of the content object (not necessarily of the serialized blob) + content_size int unsigned NOT NULL, + + -- Nominal hash of the content object (not necessarily of the serialized blob) + -- TODO: only needed if we want to maintain a pre-computed rev_sha1 + content_sha1 varbinary(32) NOT NULL, + + -- reference to model_id + -- TODO: we may want an index for this for statistics + content_model smallint unsigned NOT NULL, + + -- URL-like address of the content blob + -- TODO: we may want an index on this so we can find orphan blobs + content_address varbinary(255) NOT NULL, + + PRIMARY KEY ( content_page, content_id ) +) /*$wgDBTableOptions*/; + +-- +-- Normalization table for role names +-- +CREATE TABLE /*_*/roles ( + role_id smallint PRIMARY KEY AUTO_INCREMENT, + role_name varbinary(64) NOT NULL +); + +-- Index for looking of the internal ID of for a name +-- TODO should this be (role_name, role_id) so the index covers the requested fields? +CREATE UNIQUE INDEX /*i*/role_name ON /*_*/roles (role_name); + +-- +-- Normalization table for content model names +-- +CREATE TABLE /*_*/models ( + model_id smallint PRIMARY KEY AUTO_INCREMENT, + model_name varbinary(64) NOT NULL +); + +-- Index for looking of the internal ID of for a name +-- TODO should this be (role_name, role_id) so the index covers the requested fields? +CREATE UNIQUE INDEX /*i*/model_name ON /*_*/models (model_name); -- -- Track page-to-page hyperlinks within the wiki. -- To view, visit https://gerrit.wikimedia.org/r/378724 To unsubscribe, visit https://gerrit.wikimedia.org/r/settings Gerrit-MessageType: newchange Gerrit-Change-Id: I30a3a9834d54d0e6957553d91908b2b73b2c802f Gerrit-PatchSet: 1 Gerrit-Project: mediawiki/core Gerrit-Branch: master Gerrit-Owner: Daniel Kinzler <daniel.kinz...@wikimedia.de> _______________________________________________ MediaWiki-commits mailing list MediaWiki-commits@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/mediawiki-commits
