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ebocher avatar ebocher commented on September 26, 2024

Thanks !
We must check the shp spec to see if it can support empty geometry.
Here a unit test for H2GIS

@Test
    public void exportImportEmptyGeometry() throws SQLException {
        Statement stat = connection.createStatement();
        stat.execute("DROP TABLE IF EXISTS GEOTABLE");
        stat.execute("create table GEOTABLE(idarea int primary key, the_geom GEOMETRY(POINT))");
        stat.execute("insert into GEOTABLE values(1, 'POINT (0 0)'::GEOMETRY),(2, 'POINT EMPTY'::GEOMETRY);");
        // Create a shape file using table area
        stat.execute("CALL SHPWrite('target/points_withempty.shp', 'GEOTABLE', true)");
        stat.execute("CALL SHPRead('target/points_withempty.shp', 'IMPORT_GEOTABLE')");
        ResultSet res = stat.executeQuery("SELECT THE_GEOM FROM IMPORT_GEOTABLE ORDER BY idarea;");
        res.next();
        assertGeometryEquals("POINT(0 0)", res.getObject(1));
        res.next();
        assertTrue( ((Geometry)res.getObject(1)).isEmpty());
        res.close();
    }

from h2gis.

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