Autoincrement, but omit existing values in the column

Question

I have a table:

create table DB.t1 (id  SERIAL,name varchar(255));

and insert some data:

insert into DB.t1 (name) values (\'nam         


        

Answer 1

You can implement a trigger function on inserting. This function will chck if NEW.id is not null and update the sequence related to the id field.

IF NEW.id IS NOT NULL THEN SELECT SETVAL(sequence_name_of_id_field,NEW.id);
END IF;