maintenance/mssql/archives/patch-user_groups-ug_expiry.sql

   1 -- Primary key and expiry column in user_groups table
   2
   3 DROP INDEX IF EXISTS /*i*/ug_user_group ON /*_*/user_groups;
   4 ALTER TABLE /*_*/tag_summary ADD CONSTRAINT pk_user_groups PRIMARY KEY(ug_user, ug_group);
   5 ALTER TABLE /*_*/tag_summary ADD ug_expiry varchar(14) DEFAULT NULL;
   6 CREATE INDEX /*i*/ug_expiry ON /*_*/user_groups(ug_expiry);