security-admin/db/mysql/patches/042-add-index-on-xdatahist-table.sql

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--     http://www.apache.org/licenses/LICENSE-2.0
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drop procedure if exists create_index_on_x_data_hist;

delimiter ;;
create procedure create_index_on_x_data_hist() begin
 /* check tables exist or not */
	if exists (select * from information_schema.columns where table_schema=database() and table_name = 'x_data_hist' and column_name in('obj_id', 'obj_class_type')) then
		/* check index exist on id and obj_class_type column or not */
		if not exists (select * from information_schema.statistics where table_schema=database() and table_name = 'x_data_hist' and column_name in('obj_id', 'obj_class_type'))  then
			ALTER TABLE x_data_hist ADD INDEX x_data_hist_idx_objid_objclstype(obj_id, obj_class_type);
		end if;
	end if;
end;;

delimiter ;
call create_index_on_x_data_hist();

drop procedure if exists create_index_on_x_data_hist;