• Subject: Query Optimizer
  • From: Pete Hall <pbhall@xxxxxxxxxx>
  • Date: Wed, 03 Nov 1999 19:11:42 -0600

Does anyone have a clue as to why the query optimizer would chose to build 
a temporary access path with a key that exactly matches the second of two 
logical files (no includes or omits)? The explanation says that "The cost 
to use this access path, as determined by the optimizer, was higher than 
the cost associated with the chosen access method" (which was to build a 
temporary index). Does the fact that this is a logical file (DDS) as 
opposed to and SQL index have any bearing on the matter? This is at V4R3, 
current on database PTFs.
Pete Hall
pbhall@execpc.com
http://www.execpc.com/~pbhall
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