bitmap conversion to rowids operation with btree indexes?

  • From: ryan_gaffuri@xxxxxxxxxxx
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Tue, 11 Jan 2005 15:54:50 +0000

I see this operation in plans occasionally when I'm using btree indexes and 
there are not any bitmaps. I also see:
BITMAP OR

when using 2 btree indexes in the plan. 

does oracle do some conversion to bits to optimize certain plans even without 
bitmap indexes? 

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