security-admin/db/mysql/patches/029-add-unique-constraint-on-table-x_group.sql

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drop procedure if exists create_unique_constraint_on_groupname;

delimiter ;;
create procedure create_unique_constraint_on_groupname() begin
DECLARE loginID bigint(20);
 /* check tables exist or not */
        if exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_group' and column_name='group_name') then
                /* check unique constraint exist on group_name column or not */
                if not exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_group' and column_name='group_name' and column_key='UNI') then
                        if not exists (select * from information_schema.table_constraints where table_schema=database() and table_name = 'x_group' and constraint_name='x_group_UK_group_name') then
                                ALTER TABLE x_group ADD UNIQUE INDEX x_group_UK_group_name(group_name(767));
--	 			ALTER TABLE x_group MODIFY COLUMN group_name varchar(767) NOT NULL, ADD CONSTRAINT x_group_UK_group_name UNIQUE(group_name(767));
                        end if;
                end if;
        end if;
        if exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_group_users' and column_name='group_name') then
                if exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_group_users' and column_name='user_id') then
                /* check unique constraint exist on group_name column or not */
                        if not exists (select * from information_schema.table_constraints where table_schema=database() and table_name = 'x_group_users' and constraint_name='x_group_users_UK_uid_gname') then
                                ALTER TABLE x_group_users ADD UNIQUE INDEX x_group_users_UK_uid_gname(user_id,group_name(740));
-- 				ALTER TABLE x_group_users MODIFY COLUMN group_name varchar(767), ADD CONSTRAINT x_group_users_UK_uid_gname UNIQUE(user_id,group_name(767));
                        end if;
                end if;
        end if;
end;;

delimiter ;
call create_unique_constraint_on_groupname();

drop procedure if exists create_unique_constraint_on_groupname;