Hi again.
First of all, tank you for the immediate and precise answers.
My solution to the problem was the following. However, I found
that to be quite slow. I would like to ask if one can suggest me
how to optimize this, because I need this regularly.
CREATE FUNCTION gyegyenlo(text, text) RETURNS boolean AS '
SELECT CASE WHEN $1 is null and $2 is null THEN true
ELSE ($1) = ($2)
END;
' LANGUAGE 'sql';
CREATE OPERATOR ~= (
leftarg = text,
rightarg = text,
procedure = gyegyenlo,
commutator = ~=
);
After these I use ~= if I need lines with NULLs in both to be selected.
The only problem is that it makes the query very slow. Does anyone
knows how to optimize this?
Thanks,
Baldvin
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