RE: But I *want* to use RBO!

RE: But I *want* to use RBO!Not sure about their Optimizer migration strategy. Would it be better if they
allow us to define the constants for the Optimizer when there is no statistics?

  -----Original Message-----
  From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Tim Gorman   Sent: Tuesday, October 08, 2002 1:14 PM   To: Multiple recipients of list ORACLE-L   Subject: Re: But I *want* to use RBO!

  The well-known problems with using CBO to query the statistics-less data dictionary had been resolved in Oracle9i, as discussed in an earlier thread on this list. Not sure how they fixed it, but I suspect that Oracle is not throwing away the RBO code-base, but rather absorbing the more useful parts of it into the CBO for uses like querying the data dictionary. Either that, or they have improved the constants applied in the absence of statistics. Or both...?

• Original Message ----- From: Jacques Kilchoer To: Multiple recipients of list ORACLE-L Sent: Tuesday, October 08, 2002 1:54 PM Subject: RE: But I *want* to use RBO!

> -----Original Message-----
> From: Jesse, Rich [mailto:Rich.Jesse_at_qtiworld.com]
>
> No more RBO as of 10i...
>
>

http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_datab ase_id=NOT&p_id=189702.1

    Does this mean Oracle is getting rid of their data dictionary too? :)

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