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Re: Optimizing Queries Against UNIONed View

From: Valentin Minzatu <valentinminzatu_at_yahoo.com>
Date: 23 Jan 2007 08:36:02 -0800
Message-ID: <1169570162.430384.254150@l53g2000cwa.googlegroups.com> 





You now know for sure the same row cannot repeat among the tables so
you can remove the ALL from the UNION clause. I think that should help
you getting rid of the full table scan on both tables. (btw, I assume
CODE_TYPE column is indexed)
Received on Tue Jan 23 2007 - 10:36:02 CST












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