Procedure PostgreSQL, ERROR: «ht_planes1.id» no es una variable conocida

[Rebuilding]

Código PHP:

CREATE FUNCTION ht_mostrarorden(us_id integer, tipo integer, statusreal integer) RETURNS TABLE(idventa integer, idplan integer, periodicidad integer, carac_uno character varying, carac_dos character varying, carac_tres character varying, precio numeric)
    LANGUAGE plpgsql
    AS $$DECLARE
numorden integer;
numtipouno integer;
numtipodos integer;
numtipotres integer;
dolar numeric;
idventa integer; 
idplan integer; 
periodicidad integer; 
carac_uno character varying; 
carac_dos character varying; 
carac_tres character varying;
precio numeric;
BEGIN
SELECT au_dolar.precio INTO dolar FROM au_dolar ORDER BY ID DESC LIMIT 1;
SELECT ID INTO numorden FROM HT_ORDENES WHERE USER_ID=US_ID AND STATUS=STATUSREAL LIMIT 1;
IF(TIPO=1) THEN
  SELECT ht_ventas.id into idventa, ht_planes1.id into idplan, ht_planes1.periodicidad into periodicidad, ht_planes1.espacio into carac_uno, ht_planes1.transferencia into carac_dos, ht_planes1.dominios into carac_tres, ht_planes1.precio into precio FROM ht_ventas RIGHT JOIN ht_planes1 ON ht_planes1.id=ht_ventas.idplan WHERE ht_ventas.id_orden=numorden AND ht_ventas.tipo=1;
END IF;
IF(TIPO=2) THEN
  SELECT ht_ventas.id into idventa, ht_planes2.id into idplan, ht_planes2.periodicidad into periodicidad, ht_planes2.espacio into carac_uno, ht_planes2.transferencia into carac_dos, '' into carac_tres, ht_planes2.precio into precio FROM ht_ventas RIGHT JOIN ht_planes2 ON ht_planes2.id=ht_ventas.idplan WHERE ht_ventas.id_orden=numorden AND ht_ventas.tipo=2;
END IF;
IF(TIPO=3) THEN
  SELECT ht_dominiordenado.id into idventa, ht_dominiordenado.id into idplan,'12' into  periodicidad, ht_dominiordenado.dominio into carac_uno,ht_planes3.extension into carac_dos, '' into carac_tres, ht_planes3.precio*dolar into precio FROM ht_ventas RIGHT JOIN ht_dominiordenado ON ht_dominiordenado.id=ht_ventas.idplan RIGHT JOIN ht_planes3 ON ht_dominiordenado.idplanreal=ht_planes3.id  WHERE ht_ventas.id_orden=numorden AND ht_ventas.tipo=3;
END IF;
end;
 
$$;
 

Me da error el siguiente procedure en plpgsql (postgresql) la tabla ht_planes1 es una tabla e id es el nombre de una columna

Código PHP:

ERROR:  «ht_planes1.id» no es una variable conocida
 

Saludos y gracias de antemano