gregaeq

SET @Test = "08770871-df3b-4d02-ae40-fd9bb340b39a";

SELECT UUID_FROM_BIN(T1.user_id) as UUID, group_id,
(
	SELECT COUNT(id) > 0
	FROM contact
	WHERE sender_id = T1.user_id AND recipient_id = UUID_TO_BIN(@Test)
	OR sender_id = UUID_TO_BIN(@Test) AND recipient_id = T1.user_id
) as Is_Contact,
(