How can i cancel an SQL query 'update' in postgresql

Question

please i need help, i want to cancel an SQL query in postgresql (update) after the execution how can i do that ?

this is my sql query:

UPDATE mail_activity2 SET activity_type_id =3 WHERE activity_type_id = 5 ;

Thanks in advance.

Answer 1

do you mean the condition will always be false? like below

UPDATE mail_activity2 SET activity_type_id =3 WHERE 1=2