Tom,
I thought the rules of precedence were for RBO (the R in RBO). Whereas CBO was _intelligent_ enough to choose a path based on information available on hand.
Raj
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Rajendra dot Jamadagni at nospamespn dot com
All Views expressed in this email are strictly personal.
QOTD: Any clod can have facts, having an opinion is an art !
-----Original Message-----
Mercadante, Thomas F
Sent: Wednesday, June 11, 2003 9:30 AM
To: Multiple recipients of list ORACLE-L
CBO was what I learned on in late version of 5.x and 6.0. It was what
Oracle taught developers back then - with the chart showing the precedence
of how indexes were selected for a spcific query. And how the order of the
tables in the FROM clause was *very* important in telling the CBO how to
operate. Of course, that was when the developers had to know everything
about the data within all the tables to get things to work right.
Tom Mercadante
Oracle Certified Professional
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