Hi,
I am having trouble with the geom module (Jun2010-SP1). A query constructing a Point(x,y) from longitude (x) and latitude (y) takes much longer than expected, see below:
# MonetDB server v5.20.3, based on kernel v1.38.3 # Serving database 'germany3', using 2 threads # Compiled for x86_64-pc-linux-gnu/64bit with 64bit OIDs dynamically linked # MonetDB/SQL module v2.38.3 loaded # MonetDB/GIS module v0.18.3 loaded
sql>\d nodes CREATE TABLE "sys"."nodes" ( "id" int NOT NULL DEFAULT next value for "sys"."s_nodes", "long" decimal(10,7), "lat" decimal(10,7), CONSTRAINT "pk_nodes_id" PRIMARY KEY ("id") );
sql>select long,lat from nodes limit 1; +--------------+--------------+ | long | lat | +==============+==============+ | 8.9766191 | 47.7913748 | +--------------+--------------+ 1 tuple (1.0s)
sql>select point(8.9766191, 47.7913748); +------------------------------------------------+ | point_single_value | +================================================+ | POINT (8.9766191000000006 47.7913747999999998) | +------------------------------------------------+ 1 tuple (0.897ms)
sql>select point(long,lat) from nodes limit 1; +------------------------------------------------+ | point_long | +================================================+ | POINT (8.9766191000000006 47.7913747999999998) | +------------------------------------------------+ 1 tuple (1m 23s)
And executing something similar for the whole table caused a segfault after eating a lot of virtual memory:
sql>ALTER TABLE nodes ADD geom POINT DEFAULT NULL; sql>UPDATE nodes SET geom = Point(long,lat) WHERE geom IS NULL;
In case you would like to try yourself, here is the import script and the parser to get such a database:
http://gitorious.org/osm-poi-tools/monetdb/blobs/master/scripts/import.sh http://gitorious.org/osm-poi-tools/monetdb/blobs/master/osmparser/src/osmpar...
Thanks for your help, Mitja