Have you used the dbms_mview.explain_mview procedure. It will tell you exactly why your mview will not refresh. RF -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx To: oracle-l@xxxxxxxxxxxxx Sent: 9/30/2004 9:41 AM Subject: MV including clause Does anyone have expeirence with using including clause on a materialized view and can make a comparision of the overhead of including vs excluding? Any other hints, tips, pros, cons would be great. I have a complex query that won't work with excluding clause as an MV. Thanks -- .. David -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l