Bruce Momjian <pgman@candle.pha.pa.us> writes:
>>> * Use index to restrict rows returned by multi-key index when used with
>>> non-consecutive keys or OR clauses, so fewer heap accesses
>>
>> Not sure what this means.
> This is a Vadim idea. The idea was that if you had a multi-key index on
> col1,col2,col3, and you wanted to do a lookup on col1,col3, you could
> still use the index, and just run through all the matching col1 values
> looking for a matching col3 in the index, rather than going to the heap
> and looking for a col3 match? Is this item worth keeping?
Hmm. Maybe. Might as well leave it there awhile longer.
regards, tom lane