Also, if there have been a lot of updates to the table, you may need to run a 
REINDEX on it.   An attenuated index would be slow to load because of the 
nummber of empty disk blocks. 

-Josh Berkus
 Aglio Database Solutions
 San Francisco

---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

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