Sounds more and more like a "if a tree falls in the
forest and no-one is there" kind of discussion..

We're getting to the stage where there is an
indeterminate number of untraceable but deliberate
reasons for the optimizer to 'avoid' a hint. Without
access to the source code, that's getting pretty close
to the statement:  "the optimizer ignored my hint"

:-)



 --- Jonathan Lewis <[EMAIL PROTECTED]>
wrote: > 

snip

> 
> BTW - I still believe quite firmly that hints are
> never ignored.  They may be syntactically incorrect,
> there may be bugs, they may never become relevant;
> but I don't think they are ignored.  However, I will
> agree
> that there are more and more grey areas in 9.2 where
> the increased scope for (internal) query rewrites is
> so
> extensive that it is becoming a lot harder to decide
> why
> a hint appears to have been ignored.
> 
>  

=====
Connor McDonald
web: http://www.oracledba.co.uk
web: http://www.oaktable.net
email: [EMAIL PROTECTED]

"GIVE a man a fish and he will eat for a day. But TEACH him how to fish, and...he will 
sit in a boat and drink beer all day"

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