I saw this in the Ingres list.  It describes exactly how we process 

	SELECT * FROM tab WHERE col IN (1,2,3,4)

and describes a problem we could have if the list is large.

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Tue, 23 Feb 1999 23:46:18 -0500 (EST)
Bruce Momjian <maillist@candle.pha.pa.us>
IN list and OR processing