1. Turning autocommit=FALSE is most useful when using COPY to load data to a table and could impact the performance of INSERT of similiar data on the same table.
2. What comparison operator is the most efficient when comparing text or varchar? Today the SELECT I use to compare rows in this table do a simple row comparison
(A.c1,A.c2,A.c3,...)<>(B.c1,B.c2,B.c3,...)
but there is a mix of int8, varchar, text in there. Just fishing to see if I should instead use
((A.i1,A.i2,A.i3)<>(B.i1,B.i2,B.i3)AND A.t1!=B.t1)
or
((A.i1,A.i2,A.i3)<>(B.i1,B.i2,B.i3)AND compare_func(A.t1,B.t1))
where columns iX are integer and tX are text or varchar.
While I'm asking, how is TEXT and VARCHAR compared? Byte by Byte until there's an inequality?
Just checking.
Ty, Greg
-- Greg Spiegelberg Sr. Product Development Engineer Cranel, Incorporated. Phone: 614.318.4314 Fax: 614.431.8388 Email: [EMAIL PROTECTED] Cranel. Technology. Integrity. Focus.
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