Ben wrote:
Just the number of bits, not which ones. Basically, the hamming  distance.

I see.  Could you pre-compute the bit counts for the vectors in the table?
You could count the bits in the search vector as Martijn suggested, and then
do a lookup based on the count.

-- todd




---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
      choose an index scan if your joining column's datatypes do not
      match

Reply via email to