On 4/26/05, Lex de Haan <lex.de.haan@xxxxxxxxxxxxxx> wrote: > you can't -- if histograms are available, they will be used. > of course, you can use various hints and/or session settings > to influence the optimizer. > just out of curiosity: why would you, in the presence of histograms, > ever want to tell the optimizer *not* to use them? Because you issue a report with bind variables that for 99% of its executions *should* use histograms, but for 1% of them - the report to the board say, shouldn't use the execution path generated with histograms, and bind variable peeking isn't in operation. I don't think this applies to 9204 though. --=20 Niall Litchfield Oracle DBA http://www.niall.litchfield.dial.pipex.com -- //www.freelists.org/webpage/oracle-l