On Fri, 12 April 2002, "Hatzenbeler, Tim" wrote

> I didn't want to scan through a possible 32k sql string looking
for
> libraries I didn't want to allow, so I figured switching the
authority would
> be better and faster.... And more secure...

And scanning SQL statements requires _parsing_ the SQL. Embedded
comments, quoted literals, sub-selects... any of these could
contain character strings that matched a restricted library or
object name. The pitfalls are many and performance can drop
significantly.

This is an area that requires great care.

Tom Liotta

--
Tom Liotta
The PowerTech Group, Inc.
19426 68th Avenue South
Kent, WA 98032
Phone  253-872-7788
Fax  253-872-7904
http://www.400Security.com
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