X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/1ce8b530cd8070f3c652a35ed0ec559e522bd22b..8c2f287ce4cd90a9b8cf5d6e9d6f27adf90fa3bb:/lib-sql/functions/normalization.sql

diff --git a/lib-sql/functions/normalization.sql b/lib-sql/functions/normalization.sql
index 6fcdf552..f283f916 100644
--- a/lib-sql/functions/normalization.sql
+++ b/lib-sql/functions/normalization.sql
@@ -47,6 +47,25 @@ END;
 $$
 LANGUAGE plpgsql;
 
+-- Create housenumber tokens from an OSM addr:housenumber.
+-- The housnumber is split at comma and semicolon as necessary.
+-- The function returns the normalized form of the housenumber suitable
+-- for comparison.
+CREATE OR REPLACE FUNCTION create_housenumber_id(housenumber TEXT)
+  RETURNS TEXT
+  AS $$
+DECLARE
+  normtext TEXT;
+BEGIN
+  SELECT array_to_string(array_agg(trans), ';')
+    INTO normtext
+    FROM (SELECT lookup_word as trans, getorcreate_housenumber_id(lookup_word)
+          FROM (SELECT make_standard_name(h) as lookup_word
+                FROM regexp_split_to_table(housenumber, '[,;]') h) x) y;
+
+  return normtext;
+END;
+$$ LANGUAGE plpgsql STABLE STRICT;
 
 CREATE OR REPLACE FUNCTION getorcreate_housenumber_id(lookup_word TEXT)
   RETURNS INTEGER
