Hi,
I have a table Pois with points of interest (geogr. coordinate, label,
styleid) where I do regional querys using a rtree-index:
SELECT Pois.* FROM Pois_bb, Pois WHERE y0 < -14.8600 AND y1 > -15.12862
AND x0 < 30.46203 AND x1 > 30.00074766
AND 18 BETWEEN z0 AND z1
AND Pois_bb.Id = Pois.Id
Thats very fast, 50ms.
The problem is, when I add a second condition to get certain poi-types only
in the area:
AND styleid IN 1351,1362,1371,1374,1376,1542,1595,1597,1643,1762
The query becomes really slow, 800ms.
There is of course also an index on styleid.
I also realized, just this query:
SELECT * FROM Pois WHERE styleid IN
1351,1362,1371,1374,1376,1542,1595,1597,1643,1762
is also slow for the first call. The second call is fast.
(Using SQLite Expert Professional 3.5 for testing).
Any ideas, how to speed this up?
Thanks
Tom
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