Generate an access path plan for each as well as checking some tkprof output and you'll see why this is the case.
hth connor --- Daniel Wisser <[EMAIL PROTECTED]> wrote: > hi! > > to speed up queries i have created a bitmap index on > a column > that contains 2 chars as a maximum. to my surprise > the bitmap > index does not make the query quicker than the > 'usual' B-tree > index, though there are only bout 100 different > values in > half a million rows. > > has n.e.one got experience with bitmap indices? are > there any > further poosibilities to adapt them when creating??? > > tia & bye > > daniel > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: Daniel Wisser > 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 http://www.oaktable.net "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).