maintenance/sqlite/archives/patch-categorylinks-fix-pk.sql

   1 CREATE TABLE /*_*/categorylinks_tmp (
   2   -- Key to page_id of the page defined as a category member.
   3   cl_from int unsigned NOT NULL default 0,
   4
   5   -- Name of the category.
   6   -- This is also the page_title of the category's description page;
   7   -- all such pages are in namespace 14 (NS_CATEGORY).
   8   cl_to varchar(255) binary NOT NULL default '',
   9
  10   -- A binary string obtained by applying a sortkey generation algorithm
  11   -- (Collation::getSortKey()) to page_title, or cl_sortkey_prefix . "\n"
  12   -- . page_title if cl_sortkey_prefix is nonempty.
  13   cl_sortkey varbinary(230) NOT NULL default '',
  14
  15   -- A prefix for the raw sortkey manually specified by the user, either via
  16   -- [[Category:Foo|prefix]] or {{defaultsort:prefix}}.  If nonempty, it's
  17   -- concatenated with a line break followed by the page title before the sortkey
  18   -- conversion algorithm is run.  We store this so that we can update
  19   -- collations without reparsing all pages.
  20   -- Note: If you change the length of this field, you also need to change
  21   -- code in LinksUpdate.php. See T27254.
  22   cl_sortkey_prefix varchar(255) binary NOT NULL default '',
  23
  24   -- This isn't really used at present. Provided for an optional
  25   -- sorting method by approximate addition time.
  26   cl_timestamp timestamp NOT NULL,
  27
  28   -- Stores $wgCategoryCollation at the time cl_sortkey was generated.  This
  29   -- can be used to install new collation versions, tracking which rows are not
  30   -- yet updated.  '' means no collation, this is a legacy row that needs to be
  31   -- updated by updateCollation.php.  In the future, it might be possible to
  32   -- specify different collations per category.
  33   cl_collation varbinary(32) NOT NULL default '',
  34
  35   -- Stores whether cl_from is a category, file, or other page, so we can
  36   -- paginate the three categories separately.  This never has to be updated
  37   -- after the page is created, since none of these page types can be moved to
  38   -- any other.
  39   cl_type ENUM('page', 'subcat', 'file') NOT NULL default 'page',
  40   PRIMARY KEY (cl_from,cl_to)
  41 ) /*$wgDBTableOptions*/;
  42
  43 INSERT INTO /*_*/categorylinks_tmp
  44         SELECT *
  45                 FROM /*_*/categorylinks;
  46
  47 DROP TABLE /*_*/categorylinks;
  48
  49 ALTER TABLE /*_*/categorylinks_tmp RENAME TO /*_*/categorylinks;
  50
  51 -- We always sort within a given category, and within a given type.  FIXME:
  52 -- Formerly this index didn't cover cl_type (since that didn't exist), so old
  53 -- callers won't be using an index: fix this?
  54 CREATE INDEX /*i*/cl_sortkey ON /*_*/categorylinks (cl_to,cl_type,cl_sortkey,cl_from);
  55
  56 -- Used by the API (and some extensions)
  57 CREATE INDEX /*i*/cl_timestamp ON /*_*/categorylinks (cl_to,cl_timestamp);
  58
  59 -- Used when updating collation (e.g. updateCollation.php)
  60 CREATE INDEX /*i*/cl_collation_ext ON /*_*/categorylinks (cl_collation, cl_to, cl_type, cl_from);