inet Operator Does not exists

[ABBAS SHAKEEL <shakeel.abbas.qau@xxxxxxxxx>]

Hello Team,

I am facing an issue with inet . 

Locally i am using postgresql 8.3 and for remote server i am using 8.1

CREATE   FUNCTION inet_to_bigint(inet) RETURNS bigint AS $$
    SELECT   $1 -  inet '0.0.0.0' 
$$ LANGUAGE SQL;

Now above querry works fine for 8.3 but not for 8.1.  I was wondering if there is some thing wrong from my side.

Below is the error message

ERROR:  operator does not exist: inet - inet
HINT:  No operator matches the given name and argument type(s). You may need to add explicit type casts.
CONTEXT:  SQL function "inet_to_bigint"

 

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Best Regards
Shakeel Abbas