Help to realise function

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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