problem with function trigger

<br /><br /><font face="sans-serif" size="2">Hi I'm trying to update a table column with a pl/pgsql function and a
trigger.</font><br /><font face="sans-serif" size="2">But I didn't managed to make it work so far.</font><br /><br
/><fontface="sans-serif" size="2">Here's my  function code :</font><br /><br /><font face="sans-serif" size="2">CREATE
FUNCTIONpublic.calcul_impact() RETURNS opaque AS '</font><br /><br /><font face="sans-serif" size="2">DECLARE
</font><br/><font face="sans-serif" size="2">id_line integer;</font><br /><font face="sans-serif" size="2">quantity
integer;</font><br/><font face="sans-serif" size="2">single_price real; </font><br /><font face="sans-serif"
size="2">total_costreal; </font><br /><font face="sans-serif" size="2">amort integer;</font><br /><font
face="sans-serif"size="2">month integer;</font><br /><font face="sans-serif" size="2">impact real;</font><br /><br
/><fontface="sans-serif" size="2">BEGIN </font><br /><br /><font face="sans-serif" size="2">SELECT INTO id_line
id_line_tableFROM table WHERE id_line_table = NEW.id_line;</font><br /><font face="sans-serif" size="2">SELECT INTO
single_pricesingle_price_previ FROM table WHERE id_line_table = NEW.id_line;</font><br /><font face="sans-serif"
size="2">SELECTINTO total_cost total_cost_previ FROM table WHERE id_line_table = NEW.id_line;</font><br /><font
face="sans-serif"size="2">SELECT INTO quantity quantity_previ FROM table WHERE id_line_table = NEW.id_line;</font><br
/><fontface="sans-serif" size="2">SELECT INTO amort amortis FROM table WHERE id_line_table = NEW.id_line;</font><br
/><fontface="sans-serif" size="2">SELECT INTO month month_previ FROM table WHERE id_line_table = NEW.id_line;</font><br
/><fontface="sans-serif" size="2">SELECT INTO impact impact_previ FROM table WHERE id_line_table =
NEW.id_line;</font><br/><br /><font face="sans-serif" size="2">IF(quantity IS NULL OR single_price IS NULL) THEN
impact:=0; </font><br /><font face="sans-serif" size="2">ELSE IF(quantity >= 12) THEN impact:= (total_cost / amort);
</font><br/><font face="sans-serif" size="2">     ELSE IF(quantity < 12 AND single_price <= 500) THEN impact:=
total_cost;</font><br /><font face="sans-serif" size="2">          ELSE IF(quantity < 12 AND single_price > 500)
THENimpact:= ((12 - month)*(total_cost/(amort*12))); </font><br /><font face="sans-serif" size="2">               END
IF;</font><br/><font face="sans-serif" size="2">          END IF;</font><br /><font face="sans-serif" size="2">     END
IF;</font><br/><font face="sans-serif" size="2">END IF;</font><br /><br /><font face="sans-serif" size="2">IF (TG_OP
=''INSERT''OR TG_OP=''UPDATE'') THEN </font><br /><font face="sans-serif" size="2">        UPDATE table SET
impact_previ= impact WHERE id_line_table = NEW.id_line; </font><br /><font face="sans-serif" size="2">END IF;
</font><br/><br /><font face="sans-serif" size="2">RETURN NEW; </font><br /><br /><font face="sans-serif"
size="2">END;</font><br/><br /><font face="sans-serif" size="2">' LANGUAGE 'plpgsql';</font><br /><br /><font
face="sans-serif"size="2">CREATE TRIGGER add_impact_previ BEFORE INSERT OR UPDATE ON public.budget FOR EACH ROW EXECUTE
PROCEDUREcalcul_impact();</font><br /><br /><font face="sans-serif" size="2">I always get the error :</font><br /><br
/><fontface="sans-serif" size="2">Error SQL :</font><br /><font face="sans-serif" size="2">ERROR:  record "new" has no
fieldnamed "id_ligne"</font><br /><br /><font face="sans-serif" size="2">Has anyone an idea about what's wrong
?</font><br/><br /><font face="sans-serif" size="2">thanks for answering me</font><br />