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Message Posted: Mon, 07 Feb 2011 @ 19:47:43 GMT


     
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Subj:   Re: Performance impact of VARCHAR size
 
From:   Victor Sokovin

  For ORDER/GROUP BY any VARCHAR columns are converted to CHAR, so spool space needed for sorting is much larger now.  


Sorting can also get a lot less precise when the combined length of the sort columns gets high:

www.teradataforum.com/teradata/20090709_163603.htm


Victor



     
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