I am in set cart id parti am here. inside cartstored cart_id was : 717988 i am here. inside login status 0 SELECT IF(EXISTS(SELECT * FROM `cart` WHERE user_id=1 and tmp_id='{179DDAD2-FA2C-8EAF-9E26-5876620A0CAF}'),1,0) as result; This is existing guid : {179DDAD2-FA2C-8EAF-9E26-5876620A0CAF} This is existing : 717988 This is new guid is : {179DDAD2-FA2C-8EAF-9E26-5876620A0CAF} The extracted cart_id is :717988 in sessionCurrent cart_id is : 717988