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).
