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If the statement is not exactly the same, the new statement will be
reparsed.
If you are executing it under a different user the statement will be
reparsed.
If you drop/create an index, it will invalidate the explain plan if that was
part of the chosen path.
I believe statistics also invalidates the plans as well, but not 100% sure
on that.
"Do not criticize someone until you walked a mile in their shoes, that way
when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Thursday, September 13, 2001 8:11 PM
To: Multiple recipients of list ORACLE-L
!! Please do not post Off Topic to this List !!
No takers so far - anybody?
Alex Hillman
-----Original Message-----
Sent: Thursday, September 06, 2001 4:30 PM
To: Multiple recipients of list ORACLE-L
Let's assume that SQL statement was parsed by user X. If this or another
user reexecute this same statement what are the conditions that this SQL
statement will be reparsed? Let's assume that privileges are not changed and
tables and/or views are not dropped and views are not changed. And optimizer
parameters are not changed. First come to mind is dropping index. What about
reanalizing one of the object - theoretically should also reparse. Anything
else?
Also is there possibility to force reparsing of SQL statement if let say
index was added - short of flashing shared pool?
Alex Hillman
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