How can I address a column from a record in a plpgsql function dynamically?
In the following snippet I have access to a variable
entity.colname that contains the column that should be checked in the IF constrol structure. I'm looking into how I can replace the
foobar part in the snippet below with
entity.colname. Is that possible in plpgsql?
IF NEW.foobar IS NULL THEN RAISE EXCEPTION '% cannot be null', foobar; END IF;
This is something that could but doesn't work.
IF NEW.entity.colname IS NULL THEN RAISE EXCEPTION '% cannot be null', entity.colname; END IF;
The example above is just for illustration what I'm looking to achieve, don't judge the functionality. :)
I'm using PostgreSQL 9.1.