DB ERROR

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Mysql_Query : select sum(a.cart_price) as total_price, sum(a.cart_free_delivery) as cart_free_delivery, sum(c.goods_kg * b.option_num) as total_kg, b.option_num, a.cart_supply_id from morning_cart_table as a left join morning_cart_option_table as b on a.uid = b.cart_uid left join morning_goods_table as c on a.cart_goods_id = c.uid where a.cart_sess = '' and c.goods_free_delivery < 1 and b.option_uid = 8 and a.buy_chk = '1' and c.goods_delivery_price < 1 group by cart_supply_id
Mysql_Error : Query execution was interrupted
Mysql Error Num : 1317

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