Help to realise function

["Harvey, Allan AC" <HarveyA@xxxxxxxxxxxx>]

Hi all,

Can anyone offer suggestions on how to realise this function....

It is the $1 as the table name that is the problem.

I'm using Version 7.4.5

create or replace function last_scan( varchar, varchar ) returns float as '
    declare
        result float;

    begin
        result := value from $1 where parameter = $2 order by dt desc limit 1;

        return result;
    end;
' LANGUAGE plpgsql;



Thanks

Allan


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