ef8d484e44
It can change, by moving pages into and out of the category namespace Change-Id: I8f7a4fec5899be76f4ccac7bb6b131b44fdb9f94
61 lines
3 KiB
SQL
61 lines
3 KiB
SQL
CREATE TABLE /*_*/categorylinks_tmp (
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-- Key to page_id of the page defined as a category member.
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cl_from int unsigned NOT NULL default 0,
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-- Name of the category.
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-- This is also the page_title of the category's description page;
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-- all such pages are in namespace 14 (NS_CATEGORY).
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cl_to varchar(255) binary NOT NULL default '',
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-- A binary string obtained by applying a sortkey generation algorithm
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-- (Collation::getSortKey()) to page_title, or cl_sortkey_prefix . "\n"
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-- . page_title if cl_sortkey_prefix is nonempty.
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cl_sortkey varbinary(230) NOT NULL default '',
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-- A prefix for the raw sortkey manually specified by the user, either via
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-- [[Category:Foo|prefix]] or {{defaultsort:prefix}}. If nonempty, it's
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-- concatenated with a line break followed by the page title before the sortkey
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-- conversion algorithm is run. We store this so that we can update
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-- collations without reparsing all pages.
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-- Note: If you change the length of this field, you also need to change
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-- code in LinksUpdate.php. See T27254.
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cl_sortkey_prefix varchar(255) binary NOT NULL default '',
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-- This isn't really used at present. Provided for an optional
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-- sorting method by approximate addition time.
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cl_timestamp timestamp NOT NULL,
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-- Stores $wgCategoryCollation at the time cl_sortkey was generated. This
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-- can be used to install new collation versions, tracking which rows are not
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-- yet updated. '' means no collation, this is a legacy row that needs to be
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-- updated by updateCollation.php. In the future, it might be possible to
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-- specify different collations per category.
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cl_collation varbinary(32) NOT NULL default '',
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-- Stores whether cl_from is a category, file, or other page, so we can
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-- paginate the three categories separately. This only has to be updated
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-- when moving pages into or out of the category namespace, since file pages
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-- cannot be moved to other namespaces, nor can non-files be moved into the
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-- file namespace.
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cl_type ENUM('page', 'subcat', 'file') NOT NULL default 'page',
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PRIMARY KEY (cl_from,cl_to)
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) /*$wgDBTableOptions*/;
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INSERT INTO /*_*/categorylinks_tmp(cl_from, cl_to, cl_sortkey, cl_sortkey_prefix, cl_timestamp, cl_collation, cl_type)
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SELECT cl_from, cl_to, cl_sortkey, cl_sortkey_prefix, cl_timestamp, cl_collation, cl_type
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FROM /*_*/categorylinks;
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DROP TABLE /*_*/categorylinks;
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ALTER TABLE /*_*/categorylinks_tmp RENAME TO /*_*/categorylinks;
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-- We always sort within a given category, and within a given type. FIXME:
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-- Formerly this index didn't cover cl_type (since that didn't exist), so old
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-- callers won't be using an index: fix this?
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CREATE INDEX /*i*/cl_sortkey ON /*_*/categorylinks (cl_to,cl_type,cl_sortkey,cl_from);
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-- Used by the API (and some extensions)
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CREATE INDEX /*i*/cl_timestamp ON /*_*/categorylinks (cl_to,cl_timestamp);
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-- Used when updating collation (e.g. updateCollation.php)
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CREATE INDEX /*i*/cl_collation_ext ON /*_*/categorylinks (cl_collation, cl_to, cl_type, cl_from);
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