0f13fff160
WMF DBAs have been doing a massive effort to convert UNIQUE KEYS into PRIMARY KEY. Having a PK is essential to do maintenance, specially on large tasks. By not having a PK it is impossible to add it in a safe way if not done directly on the master. Having a PK means that we can easily change the PK into another one if needed in the future. The ones we chose might not be the best ones, but will allow us to get them changed. Bug: T172514 Change-Id: Id635297838938c7c5dfe65d45285a4d16d65152d
27 lines
1 KiB
SQL
27 lines
1 KiB
SQL
CREATE TABLE /*_*/templatelinks_tmp (
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-- Key to the page_id of the page containing the link.
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tl_from int unsigned NOT NULL default 0,
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-- Namespace for this page
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tl_from_namespace int NOT NULL default 0,
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-- Key to page_namespace/page_title of the target page.
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-- The target page may or may not exist, and due to renames
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-- and deletions may refer to different page records as time
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-- goes by.
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tl_namespace int NOT NULL default 0,
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tl_title varchar(255) binary NOT NULL default '',
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PRIMARY KEY (tl_from,tl_namespace,tl_title)
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) /*$wgDBTableOptions*/;
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INSERT INTO /*_*/templatelinks_tmp
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SELECT * FROM /*_*/templatelinks;
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DROP TABLE /*_*/templatelinks;
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ALTER TABLE /*_*/templatelinks_tmp RENAME TO /*_*/templatelinks;
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-- Reverse index, for Special:Whatlinkshere
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CREATE INDEX /*i*/tl_namespace ON /*_*/templatelinks (tl_namespace,tl_title,tl_from);
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-- Index for Special:Whatlinkshere with namespace filter
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CREATE INDEX /*i*/tl_backlinks_namespace ON /*_*/templatelinks (tl_from_namespace,tl_namespace,tl_title,tl_from);
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