Thank you! I completely missed that in the documentation. That explains why I can't get it to use the index even with a hint. What an annoying, and seemingly unnecessary restriction.
-----Original Message----- Sent: Friday, February 15, 2002 9:48 AM To: Multiple recipients of list ORACLE-L Oracle function based indexes do not work if OR clause is used .This is mentioned in the oracle docs. I think if u use union clause it may work out . try and see... > --- "Seefelt, Beth" <[EMAIL PROTECTED]> > wrote: > > > Hi everybody, > > > > I'm hoping someone can help me understand this. > > > > I have this query - > > > > SELECT ORDERID FROM WWW SHOPCART > > WHERE UPPER(MEMBERNAME) ='198917777' ; > > > > I added an index on the column UPPER(MEMBERNAME) and > > it works great. > > > > I have another query - > > > > SELECT ORDERID FROM WWW SHOPCART > > WHERE UPPER(MEMBERNAME) ='198917777' OR > > UPPER(MEMBERNAME)='1989155555'; > > > > and this query will not use the index at all. > > > > I can't understand why the optimizer won't choose to > > use the function based index when there is an OR > > clause. I've tried the same query with just > > MEMBERNAME= and using an index on MEMBERNAME, and > > the optimizer will use the index if I OR my > > criteria together. > > > > Any ideas? > > > > Thanks, > > > > Beth > > > > -- > > Please see the official ORACLE-L FAQ: > > http://www.orafaq.com > > -- > > Author: Seefelt, Beth > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- (858) 538-5051 FAX: > > (858) 538-5051 > > San Diego, California -- Public Internet > > access / Mailing Lists > > > --------------------------------------------------------- > ------------ > > To REMOVE yourself from this mailing list, send an > > E-Mail message > > to: [EMAIL PROTECTED] (note EXACT spelling of > > 'ListGuru') and in > > the message BODY, include a line containing: UNSUB > > ORACLE-L > > (or the name of mailing list you want to be removed > > from). You may > > also send the HELP command for other information > > (like subscribing). > > ===== > Connor McDonald > http://www.oracledba.co.uk (mirrored at > http://www.oradba.freeserve.co.uk) > > "Some days you're the pigeon, some days you're the > statue" > > __________________________________________________ > Do You Yahoo!? > Everything you'll ever need on one web page > from News and Sport to Email and Music Charts http://uk.my.yahoo.com > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: =?iso-8859-1?q?Connor=20McDonald?= > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: > (858) 538-5051 > San Diego, California -- Public Internet access > / Mailing Lists > --------------------------------------------------------- > ------------ > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > ORACLE-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information (like > subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ratnesh Kumar Singh INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Seefelt, Beth INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
