Re: Oracle Spatial and PostGis

From: Martin Gainty <mgainty(at)hotmail(dot)com>
To: <mabewlun(at)gmail(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Oracle Spatial and PostGis
Date: 2010-07-21 13:45:52
Message-ID: BLU142-W130525F11CB9725C24AF5CAEA10@phx.gbl
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take Oracle Spatial SDO_FILTER Functio

Uses the spatial index to identify either the set of spatial objects that are likely to interact spatially with a given object

Format: SDO_FILTER(geometry1, geometry2, params);

http://download.oracle.com/docs/html/A85337_01/sdo_oper.htm#76214

example:
select geom " +
"from geod_counties " +
"where sdo_filter (geom, sdo_geometry(2003,8307,null," +
"sdo_elem_info_array(1,1003,3)," +
"sdo_ordinate_array (-75,40,-74,41))) = 'TRUE'");

PostGIS equivalent:
SELECT a.geom
FROM geod_counties a
WHERE ST_Intersects(a.geom, sdo_geometry(2003,8307,null,"sdo_elem_info_array(1,1003,3))
Function name is different

Oracle sdo_filter 3rd param would need to be discarded

looks like a hand conversion
Martin Gainty
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Date: Wed, 21 Jul 2010 12:41:28 +0200
Subject: [GENERAL] Oracle Spatial and PostGis
From: mabewlun(at)gmail(dot)com
To: pgsql-general(at)postgresql(dot)org

Hi,
when I have an Oracle spatial database, I can easily convert it to PostgreSQL database, using handwritten tool, or just dumping it to a shape file and loading to the PostGis database. Do you know any simple way for (semi)automatical conversion of the spatial queries from Oracle to PostGis? I have many spatial queries in Oracle and I'd like to use them with PostgreSQL. Any ideas where I can find more information?

regards
Szymon Guz
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