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- CREATE TYPE link_type AS ENUM ('page', 'subcat', 'file');
- DROP INDEX cl_sortkey;
- ALTER TABLE categorylinks
- ADD COLUMN cl_sortkey_prefix TEXT NOT NULL DEFAULT '',
- ADD COLUMN cl_collation SMALLINT NOT NULL DEFAULT 0,
- ADD COLUMN cl_type link_type NOT NULL DEFAULT 'page';
- CREATE INDEX cl_collation ON categorylinks ( cl_collation );
- CREATE INDEX cl_sortkey ON categorylinks ( cl_to, cl_type, cl_sortkey, cl_from );
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