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   1  -- A table to track tags for revisions, logs and recent changes.
   2  -- Andrew Garrett, 2009-01
   3  CREATE TABLE /*_*/change_tag (
   4      ct_rc_id int NULL,
   5      ct_log_id int NULL,
   6      ct_rev_id int NULL,
   7      ct_tag varchar(255) NOT NULL,
   8      ct_params BLOB NULL
   9  ) /*$wgDBTableOptions*/;
  10  
  11  CREATE UNIQUE INDEX /*i*/change_tag_rc_tag ON /*_*/change_tag (ct_rc_id,ct_tag);
  12  CREATE UNIQUE INDEX /*i*/change_tag_log_tag ON /*_*/change_tag (ct_log_id,ct_tag);
  13  CREATE UNIQUE INDEX /*i*/change_tag_rev_tag ON /*_*/change_tag (ct_rev_id,ct_tag);
  14  -- Covering index, so we can pull all the info only out of the index.
  15  CREATE INDEX /*i*/change_tag_tag_id ON /*_*/change_tag (ct_tag,ct_rc_id,ct_rev_id,ct_log_id);