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<p class="MsoNormal">Hello all,<o:p></o:p></p>
<p class="MsoNormal">I'm creating topology data from almost all world road OSM data ( More than 77 Million ways).<o:p></o:p></p>
<p class="MsoNormal">Processing the data with postgis topology in one shot is so long than that I created a hexagonal grid that let me create topological data from only one or many cell of the grid.<o:p></o:p></p>
<p class="MsoNormal">Even this way, It' s going to take many month to process the world's data.<o:p></o:p></p>
<p class="MsoNormal">Is there a way to make it faster?<o:p></o:p></p>
<p class="MsoNormal">This is my function that I use to process data.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">CREATE OR REPLACE FUNCTION cm_update_tile_data(tile_id integer)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> RETURNS character varying AS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">$BODY$<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">DECLARE r RECORD;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">BEGIN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> FOR r IN SELECT * FROM way, join world_grid on line&& the_geom where gid=tile_id and topo_geom is NULL LOOP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> BEGIN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> UPDATE way
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">SET topo_geom = topology.toTopoGeom(st_force2d(line), 'way_topo', 1)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> WHERE id = r.id;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> EXCEPTION<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> WHEN OTHERS THEN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> RAISE WARNING 'Loading of record % failed: %', r.id, SQLERRM;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> END;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> END LOOP;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> UPDATE world_grid set last_update = now() where gid=tile_id;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> return 'OK';<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">END<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif"">$BODY$<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> LANGUAGE plpgsql VOLATILE<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif""> COST 100;<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal"><b><span lang="FR" style="color:#000099;mso-fareast-language:FR-CA"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="FR" style="color:#000099;mso-fareast-language:FR-CA">Marc</span></b><span lang="FR" style="mso-fareast-language:FR-CA">
</span><span style="mso-fareast-language:FR-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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