use wikidata tag for linking places

[nominatim.git] / sql / functions / placex_triggers.sql

diff --git a/sql/functions/placex_triggers.sql b/sql/functions/placex_triggers.sql
index 0fd0c3bce4aabfd6256dfdb59b1e7c67ad2bdb4d..5c04ad065a9c58211e0bbb3912ac457f4adc76fa 100644 (file)
--- a/sql/functions/placex_triggers.sql
+++ b/sql/functions/placex_triggers.sql
@@ -220,6 +220,21 @@ BEGIN
     END LOOP;
   END IF;
 
+  IF bnd.extratags ? 'wikidata' THEN
+    FOR linked_placex IN
+      SELECT * FROM placex
+      WHERE placex.class = 'place' AND placex.osm_type = 'N'
+        AND placex.extratags ? 'wikidata' -- needed to select right index
+        AND placex.extratags->'wikidata' = bnd.extratags->'wikidata'
+        AND placex.rank_search < 26
+        AND _st_covers(bnd.geometry, placex.geometry)
+      ORDER BY make_standard_name(name->'name') = bnd_name desc
+    LOOP
+      --DEBUG: RAISE WARNING 'Found wikidata-matching place node %', linked_placex.osm_id;
+      RETURN linked_placex;
+    END LOOP;
+  END IF;
+
   -- Name searches can be done for ways as well as relations
   IF bnd_name is not null THEN
     --DEBUG: RAISE WARNING 'Looking for nodes with matching names';