New files for setup

geocoder/setup/admin0/triggers.sql

@@ -0,0 +1,12 @@
+-- create trigger function. used in both admin0 and admin1 synonym tables
+CREATE OR REPLACE FUNCTION alpha_numeric_identifiers() RETURNS trigger AS $alpha_numeric_identifiers$
+    BEGIN
+        NEW.name_ := lower(regexp_replace(NEW.name, '[^a-zA-Z\u00C0-\u00ff]+', '', 'g'));
+        RETURN NEW;
+    END;
+$alpha_numeric_identifiers$ LANGUAGE plpgsql;
+
+-- add trigger on admin0 synonym table name_ column
+CREATE TRIGGER admin0_synonyms_name_update
+BEFORE INSERT OR UPDATE OF name ON admin0_synonyms
+  FOR EACH ROW EXECUTE PROCEDURE alpha_numeric_identifiers()