);
+--
+-- Edits, blocks, and other actions typically have a textual comment describing
+-- the action. They are stored here to reduce the size of the main tables, and
+-- to allow for deduplication.
+--
+-- Deduplication is currently best-effort to avoid locking on inserts that
+-- would be required for strict deduplication. There MAY be multiple rows with
+-- the same comment_text and comment_data.
+--
+CREATE TABLE /*_*/comment (
+ comment_id bigint unsigned NOT NULL PRIMARY KEY IDENTITY(0,1),
+ comment_hash INT NOT NULL,
+ comment_text nvarchar(max) NOT NULL,
+ comment_data nvarchar(max)
+);
+-- Index used for deduplication.
+CREATE INDEX /*i*/comment_hash ON /*_*/comment (comment_hash);
+
+-- dummy row for FKs. Hash is intentionally wrong so CommentStore won't match it.
+INSERT INTO /*_*/comment (comment_hash, comment_text) VALUES (-1, '** dummy **');
+
+
--
-- Core of the wiki: each page has an entry here which identifies
-- it by title and contains some essential metadata.
rev_id INT NOT NULL UNIQUE IDENTITY(0,1),
rev_page INT NOT NULL REFERENCES /*_*/page(page_id) ON DELETE CASCADE,
rev_text_id INT NOT NULL, -- FK added later
- rev_comment NVARCHAR(255) NOT NULL,
+ rev_comment NVARCHAR(255) NOT NULL CONSTRAINT DF_rev_comment DEFAULT '',
rev_user INT REFERENCES /*_*/mwuser(user_id) ON DELETE SET NULL,
rev_user_text NVARCHAR(255) NOT NULL DEFAULT '',
rev_timestamp varchar(14) NOT NULL default '',
ALTER TABLE /*_*/page ADD CONSTRAINT FK_page_latest_page_id FOREIGN KEY (page_latest) REFERENCES /*_*/revision(rev_id);
+--
+-- Temporary table to avoid blocking on an alter of revision.
+--
+-- On large wikis like the English Wikipedia, altering the revision table is a
+-- months-long process. This table is being created to avoid such an alter, and
+-- will be merged back into revision in the future.
+--
+CREATE TABLE /*_*/revision_comment_temp (
+ revcomment_rev INT NOT NULL CONSTRAINT FK_revcomment_rev FOREIGN KEY REFERENCES /*_*/revision(rev_id) ON DELETE CASCADE,
+ revcomment_comment_id bigint unsigned NOT NULL CONSTRAINT FK_revcomment_comment_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
+ CONSTRAINT PK_revision_comment_temp PRIMARY KEY (revcomment_rev, revcomment_comment_id)
+);
+CREATE UNIQUE INDEX /*i*/revcomment_rev ON /*_*/revision_comment_temp (revcomment_rev);
+
--
-- Holds TEXT of individual page revisions.
--
ar_namespace SMALLINT NOT NULL DEFAULT 0,
ar_title NVARCHAR(255) NOT NULL DEFAULT '',
ar_text NVARCHAR(MAX) NOT NULL,
- ar_comment NVARCHAR(255) NOT NULL,
+ ar_comment NVARCHAR(255) NOT NULL CONSTRAINT DF_ar_comment DEFAULT '',
+ ar_comment_id bigint unsigned NOT NULL CONSTRAINT DF_ar_comment_id DEFAULT 0 CONSTRAINT FK_ar_comment_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
ar_user INT CONSTRAINT ar_user__user_id__fk FOREIGN KEY REFERENCES /*_*/mwuser(user_id),
ar_user_text NVARCHAR(255) NOT NULL,
ar_timestamp varchar(14) NOT NULL default '',
ipb_by_text nvarchar(255) NOT NULL default '',
-- Text comment made by blocker.
- ipb_reason nvarchar(255) NOT NULL,
+ ipb_reason nvarchar(255) NOT NULL CONSTRAINT DF_ipb_reason DEFAULT '',
+
+ -- Key to comment_id. Text comment made by blocker.
+ -- ("DEFAULT 0" is temporary, signaling that ipb_reason should be used)
+ ipb_reason_id bigint unsigned NOT NULL CONSTRAINT DF_ipb_reason_id DEFAULT 0 CONSTRAINT FK_ipb_reason_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
-- Creation (or refresh) date in standard YMDHMS form.
-- IP blocks expire automatically.
-- Description field as entered by the uploader.
-- This is displayed in image upload history and logs.
- img_description nvarchar(255) NOT NULL,
+ img_description nvarchar(255) NOT NULL CONSTRAINT DF_img_description DEFAULT '',
-- user_id and user_name of uploader.
img_user int REFERENCES /*_*/mwuser(user_id) ON DELETE SET NULL,
-- Used to get media of one type
CREATE INDEX /*i*/img_media_mime ON /*_*/image (img_media_type,img_major_mime,img_minor_mime);
+--
+-- Temporary table to avoid blocking on an alter of image.
+--
+-- On large wikis like Wikimedia Commons, altering the image table is a
+-- months-long process. This table is being created to avoid such an alter, and
+-- will be merged back into image in the future.
+--
+CREATE TABLE /*_*/image_comment_temp (
+ imgcomment_name nvarchar(255) NOT NULL CONSTRAINT FK_imgcomment_name FOREIGN KEY REFERENCES /*_*/image(imgcomment_name) ON DELETE CASCADE,
+ imgcomment_description_id bigint unsigned NOT NULL CONSTRAINT FK_imgcomment_description_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
+ CONSTRAINT PK_image_comment_temp PRIMARY KEY (imgcomment_name, imgcomment_description_id)
+);
+CREATE UNIQUE INDEX /*i*/imgcomment_name ON /*_*/image_comment_temp (imgcomment_name);
+
--
-- Previous revisions of uploaded files.
oi_width int NOT NULL default 0,
oi_height int NOT NULL default 0,
oi_bits int NOT NULL default 0,
- oi_description nvarchar(255) NOT NULL,
+ oi_description nvarchar(255) NOT NULL CONSTRAINT DF_oi_description DEFAULT '',
+ oi_description_id bigint unsigned NOT NULL CONSTRAINT DF_oi_description_id DEFAULT 0 CONSTRAINT FK_oi_description_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
oi_user int REFERENCES /*_*/mwuser(user_id),
oi_user_text nvarchar(255) NOT NULL,
oi_timestamp varchar(14) NOT NULL default '',
-- Deletion information, if this file is deleted.
fa_deleted_user int,
fa_deleted_timestamp varchar(14) default '',
- fa_deleted_reason nvarchar(max),
+ fa_deleted_reason nvarchar(max) CONSTRAINT DF_fa_deleted_reason DEFAULT '',
+ fa_deleted_reason_id bigint unsigned NOT NULL CONSTRAINT DF_fa_deleted_reason_id DEFAULT 0 CONSTRAINT FK_fa_deleted_reason_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
-- Duped fields from image
fa_size int default 0,
fa_media_type varchar(16) default null,
fa_major_mime varchar(16) not null default 'unknown',
fa_minor_mime nvarchar(100) default 'unknown',
- fa_description nvarchar(255),
+ fa_description nvarchar(255) CONSTRAINT DF_fa_description DEFAULT '',
+ fa_description_id bigint unsigned NOT NULL CONSTRAINT DF_fa_description DEFAULT 0 CONSTRAINT FK_fa_description FOREIGN KEY REFERENCES /*_*/comment(comment_id),
fa_user int default 0 REFERENCES /*_*/mwuser(user_id) ON DELETE SET NULL,
fa_user_text nvarchar(255),
fa_timestamp varchar(14) default '',
-- as in revision...
rc_comment nvarchar(255) NOT NULL default '',
+ rc_comment_id bigint unsigned NOT NULL CONSTRAINT DF_rc_comment_id DEFAULT 0 CONSTRAINT FK_rc_comment_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
rc_minor bit NOT NULL default 0,
-- Edits by user accounts with the 'bot' rights key are
-- Freeform text. Interpreted as edit history comments.
log_comment nvarchar(255) NOT NULL default '',
+ -- Key to comment_id. Comment summarizing the change.
+ -- ("DEFAULT 0" is temporary, signaling that log_comment should be used)
+ log_comment_id bigint unsigned NOT NULL CONSTRAINT DF_log_comment_id DEFAULT 0 CONSTRAINT FK_log_comment_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
+
-- miscellaneous parameters:
-- LF separated list (old system) or serialized PHP array (new system)
log_params nvarchar(max) NOT NULL,
pt_namespace int NOT NULL,
pt_title nvarchar(255) NOT NULL,
pt_user int REFERENCES /*_*/mwuser(user_id) ON DELETE SET NULL,
- pt_reason nvarchar(255),
+ pt_reason nvarchar(255) CONSTRAINT DF_pt_reason DEFAULT '',
+ pt_reason_id bigint unsigned NOT NULL CONSTRAINT DF_pt_reason_id DEFAULT 0 CONSTRAINT FK_pt_reason_id FOREIGN KEY REFERENCES /*_*/comment(comment_id),
pt_timestamp varchar(14) NOT NULL,
pt_expiry varchar(14) NOT NULL,
pt_create_perm nvarchar(60) NOT NULL
dépôts / lhc / web / wiklou.git / blobdiff