Tom Lane wrote:
"Cristian Prieto" <cristian@xxxxxxxxxxxxxxx> writes:
mydb=# explain analyze select locid from geoip_block where
'216.230.158.50'::inet between start_block and end_block;
As you see it still using a sequential scan in the table and ignores the
index, any other suggestion?
That two-column index is entirely useless for this query; in fact btree
indexes of any sort are pretty useless. You really need some sort of
multidimensional index type like rtree or gist. There was discussion
just a week or three ago of how to optimize searches for intervals
overlapping a specified point, which is identical to your problem.
Can't remember if the question was about timestamp intervals or plain
intervals, but try checking the list archives.
regards, tom lane
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I think that Tom is talking about a discussion which I started entitled
"Planner create a slow plan without an available index" search for it
maybe it will help you.
At the end I created an RTREE index and it did solved my problem though
my data was 2 INT fields and not INET fields as yours so im not sure how
can you work with that... To solve my problem I created boxes from the 2
numbers and with them I did overlapping.
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