Hi, I have simplified function like this:
----------------
CREATE OR REPLACE FUNCTION f(varchar) RETURNS varchar AS $FUNC$
DECLARE
addr ALIAS FOR $1;
BEGIN
-- return NULL;
-- return '';
END
$FUNC$ LANGUAGE 'plpgsql';
-----------------
This function is returning varchar and it always returns at least one row. How
can I make it to return 0 rows? Is it possible or not and how?
Returning NULL does not help (return NULL string in 1 row). Not to return a
value leads to error output.
Many thanks for help
Tomas
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