security-admin/db/mysql/patches/058-add-unique-constraint-on-x_policy-table-service-resourcesign-column.sql

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drop procedure if exists create_unique_constraint_on_service_and_resourcesignature;

delimiter ;;
create procedure create_unique_constraint_on_service_and_resourcesignature() begin
 /* check table and columns exist or not */
	if exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_policy' and column_name in('resource_signature','service')) then
		/* check unique constraint exist on resource_signature and service column or not */
		if not exists (select * from information_schema.table_constraints where table_schema=database() and table_name = 'x_policy' and constraint_name='x_policy_UK_service_signature') then
			ALTER TABLE x_policy ADD UNIQUE INDEX x_policy_UK_service_signature(service,resource_signature);
		end if;
	end if;
end;;

delimiter ;
call create_unique_constraint_on_service_and_resourcesignature();

drop procedure if exists create_unique_constraint_on_service_and_resourcesignature;