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The current news flying about on the net is that DDL created files do data validation (such as on numeric fields) on the write, not on the read. The old-style DDS files do the checking on the read. A very carefully researched and written column on this very topic by Dan Cruikshank (an IBM employee, as I understand it) appeared in a recent iSeries Network issue. http://www.iseriesnetwork.com/resources/artarchive/index.cfm?fuseaction= viewarticle&CO_ContentID=20067&channel= Joe > From: Jon Paris > > Don't forget to experiment with this before changing all of these files! > Unless this is something different, the only potential performance boost I > have heard of for SQL created files is that they use a larger paging size.
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