Why not try the two (one with qualifiers and one
without) and trace each - on a freshly started
database...

See how much additional recursive sql occurs (if any) 

hth
connor

--- Arn Klammer <[EMAIL PROTECTED]> wrote: >
At a course some years ago, we were told that in
> join statements, we should qualify ALL our column
> names with the appropriate table name, not just
> those that may be ambiguous. The reason was that the
> parser would not need to spend time checking
> multiple tables to determine the table to which each
> column belongs.
> 
> Is this still a valid rule?
> 
> Does this apply to statements in PL/SQL
> procedures/packages?  Or are they different, because
> they are checked at compile time?  
> 
> -a
> 
> 
>
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=====
Connor McDonald
http://www.oracledba.co.uk (mirrored at 
http://www.oradba.freeserve.co.uk)

"Some days you're the pigeon, some days you're the statue"

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