Dear all,
What is the correct way to check whether an array is empty?
I have an array which I initialize with '{}' and then do som array_append
under some circonstances. I would like to know whether the array is empty at
the end of the function. I have not found the answer in the help page nor on
the web. I use the keyword isnull but that does not seem to work in all the
cases.
I would appreciate if someone could put this piece of information into the
Postgres documentation.
Here is what I do, in pseudo-code:
myarray varchar[];
myarray := '{}';
FOR ___ LOOP
IF (___) THEN
myarray := array_append(myarray, somestuff);
END IF;
END LOOP;
-- Is my array empty now?
IF (myarray isnull) THEN
__
END IF;
Regards,
Alexis Beuraud
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