FOR UPDATE

Hello,

PG: 9.4
CentOS 6

I am writing functions to lock results.

Let's take an example:

CREATE OR REPLACE FUNCTION usp_locking_my_result($1 VARCHAR(50), $2
VARCHAR(50))
RETURNS TEXT AS $$
SELECT value
FROM my_table
WHERE field1 = $1 AND field2 = $2 FOR UPDATE;
$$ LANGUAGE SQL;

What happens if one of those arguments are empty and database finds
results? ( I think they will locked )

Should I check the inputs and raise an exception if there are empty ?

Thank,
Saïd