Fix SQL update logic (patch from 3.6.2)

layers/waterway/update_waterway_linestring.sql

@@ -0,0 +1,28 @@
+DROP TRIGGER IF EXISTS trigger_refresh ON osm_waterway_linestring;
+
+DO $$
+BEGIN
+  update osm_waterway_linestring SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+  update osm_waterway_linestring_gen1 SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+  update osm_waterway_linestring_gen2 SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+  update osm_waterway_linestring_gen3 SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+END $$;
+
+
+-- Handle updates
+
+CREATE SCHEMA IF NOT EXISTS waterway_linestring;
+CREATE OR REPLACE FUNCTION waterway_linestring.refresh() RETURNS trigger AS
+  $BODY$
+  BEGIN
+    RAISE NOTICE 'Refresh waterway_linestring %', NEW.osm_id;
+    NEW.tags = slice_language_tags(NEW.tags) || get_basic_names(NEW.tags, NEW.geometry);
+    RETURN NEW;
+  END;
+  $BODY$
+language plpgsql;
+
+CREATE TRIGGER trigger_refresh
+    BEFORE INSERT OR UPDATE ON osm_waterway_linestring
+    FOR EACH ROW
+    EXECUTE PROCEDURE waterway_linestring.refresh();