2 -- Track category inclusions *used inline*
3 -- This tracks a single level of category membership
4 -- (folksonomic tagging, really).
6 CREATE TABLE /*$wgDBprefix*/categorylinks (
7 -- Key to page_id of the page defined as a category member.
8 cl_from int(8) unsigned NOT NULL default '0',
10 -- Name of the category.
11 -- This is also the page_title of the category's description page;
12 -- all such pages are in namespace 14 (NS_CATEGORY).
13 cl_to varchar(255) binary NOT NULL default '',
15 -- The title of the linking page, or an optional override
16 -- to determine sort order. Sorting is by binary order, which
17 -- isn't always ideal, but collations seem to be an exciting
18 -- and dangerous new world in MySQL...
20 -- For MySQL 4.1+ with charset set to utf8, the sort key *index*
21 -- needs cut to be smaller than 1024 bytes (at 3 bytes per char).
22 -- To sort properly on the shorter key, this field needs to be
23 -- the same shortness.
24 cl_sortkey varchar(86) binary NOT NULL default '',
26 -- This isn't really used at present. Provided for an optional
27 -- sorting method by approximate addition time.
28 cl_timestamp timestamp NOT NULL,
30 UNIQUE KEY cl_from(cl_from,cl_to),
32 -- This key is trouble. It's incomplete, AND it's too big
33 -- when collation is set to UTF-8. Bleeeacch!
34 KEY cl_sortkey(cl_to,cl_sortkey),
37 KEY cl_timestamp(cl_to,cl_timestamp)