use address counts for improving index lookup

[nominatim.git] / lib-sql / tiger_import_start.sql

diff --git a/lib-sql/tiger_import_start.sql b/lib-sql/tiger_import_start.sql
index f344e1745ac8da95a86fd3d8013a8916671f2f91..0ff534368d0929f6c58eb7b2fb6b2b6ab9d5402a 100644 (file)
--- a/lib-sql/tiger_import_start.sql
+++ b/lib-sql/tiger_import_start.sql
@@ -1,5 +1,19 @@
+-- SPDX-License-Identifier: GPL-2.0-only
+--
+-- This file is part of Nominatim. (https://nominatim.org)
+--
+-- Copyright (C) 2022 by the Nominatim developer community.
+-- For a full list of authors see the git log.
 DROP TABLE IF EXISTS location_property_tiger_import;
-CREATE TABLE location_property_tiger_import (linegeo GEOMETRY, place_id BIGINT, partition INTEGER, parent_place_id BIGINT, startnumber INTEGER, endnumber INTEGER, interpolationtype TEXT, postcode TEXT);
+CREATE TABLE location_property_tiger_import (
+  linegeo GEOMETRY,
+  place_id BIGINT,
+  partition INTEGER,
+  parent_place_id BIGINT,
+  startnumber INTEGER,
+  endnumber INTEGER,
+  step SMALLINT,
+  postcode TEXT);
 
 CREATE OR REPLACE FUNCTION tiger_line_import(linegeo GEOMETRY, in_startnumber INTEGER,
                                              in_endnumber INTEGER, interpolationtype TEXT,
@@ -18,11 +32,12 @@ DECLARE
 BEGIN
 
   IF in_endnumber > in_startnumber THEN
-    startnumber = in_startnumber;
-    endnumber = in_endnumber;
+    startnumber := in_startnumber;
+    endnumber := in_endnumber;
   ELSE
-    startnumber = in_endnumber;
-    endnumber = in_startnumber;
+    startnumber := in_endnumber;
+    endnumber := in_startnumber;
+    linegeo := ST_Reverse(linegeo);
   END IF;
 
   IF startnumber < 0 THEN
@@ -44,8 +59,10 @@ BEGIN
   END IF;
 
   -- Filter out really broken tiger data
-  IF numberrange > 0 AND (numberrange::float/stepsize::float > 500)
-                    AND ST_length(linegeo)/(numberrange::float/stepsize::float) < 0.000001 THEN
+  IF numberrange > 0
+     and numberrange::float/stepsize::float > 500
+     and ST_length(linegeo)/(numberrange::float/stepsize::float) < 0.000001
+  THEN
     RAISE WARNING 'Road too short for number range % to % (%)',startnumber,endnumber,
                   ST_length(linegeo)/(numberrange::float/stepsize::float);
     RETURN 0;
@@ -68,8 +85,12 @@ BEGIN
   END IF;
 
 --insert street(line) into import table
-insert into location_property_tiger_import (linegeo, place_id, partition, parent_place_id, startnumber, endnumber, interpolationtype, postcode)
-values (linegeo, nextval('seq_place'), out_partition, out_parent_place_id, startnumber, endnumber, interpolationtype, in_postcode);
+insert into location_property_tiger_import (linegeo, place_id, partition,
+                                            parent_place_id, startnumber, endnumber,
+                                            step, postcode)
+values (linegeo, nextval('seq_place'), out_partition,
+        out_parent_place_id, startnumber, endnumber,
+        stepsize, in_postcode);
 
   RETURN 1;
 END;