Bug in ResultSet.deleteRow() implementation

Hi,

I couldn't find some information about a bug tracker on 
jdbc.postgresql.org, so here's my bug report:

I do a
	SELECT pay_key FROM invoices;

and then delete some expired invoices using deleteRow() on the ResultSet. 
This throws

org.postgresql.util.PSQLException: The column name iid was not found in 
this ResultSet.
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.findColumn(AbstractJdbc2ResultSet.java:2562)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.isUpdateable(AbstractJdbc2ResultSet.java:1535)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.checkUpdateable(AbstractJdbc2ResultSet.java:2661)
	at 
org.postgresql.jdbc2.AbstractJdbc2ResultSet.deleteRow(AbstractJdbc2ResultSet.java:715)

iid is the primary key of invoices. If I change the query to

SELECT pay_key, iid FROM invoices;

deleteRow() works. But I don't need iid in the query because it's not 
relevant for determining if the invoice expired. So I found a work-around, 
but please fix this, as it is not required by the JDBC spec to include the 
primary key in the query.

My system:
postgresql-8.4-702.jdbc4.jar
postgresql-8.1.21-1.el5_5.1 on CentOS 5.5.
java version "1.6.0_17"
Java(TM) SE Runtime Environment (build 1.6.0_17-b04)
Java HotSpot(TM) Server VM (build 14.3-b01, mixed mode)

cu,
	boris