From: Sarah Hoffmann <lonvia@denofr.de>
Date: Sat, 28 Jan 2012 23:27:25 +0000 (+0000)
Subject: improve import performance for special phrases
X-Git-Tag: v2.0.0~124
X-Git-Url: https://git.openstreetmap.org/nominatim.git/commitdiff_plain/c5e69fadd0beed697a4a3d1708fcdaa4f29ac703

improve import performance for special phrases

- create a temporary index on placex
- create indices on place_classtype_* tables after insert
- grant www-data permission to tables
---

diff --git a/utils/specialphrases.php b/utils/specialphrases.php
index 39c4dc4f..5b3abe40 100755
--- a/utils/specialphrases.php
+++ b/utils/specialphrases.php
@@ -81,13 +81,15 @@
 			}
 		}
 
+        echo "create index idx_placex_classtype on placex (class, type);";
+
 		foreach($aPairs as $aPair)
 		{
 			if ($aPair[1] == 'highway') continue;
 
 			echo "create table place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])." as ";
 			echo "select place_id as place_id,st_centroid(geometry) as centroid from placex where ";
-			echo "class = '".pg_escape_string($aPair[0])."' and type = '".pg_escape_string($aPair[1])."' limit 0;\n";
+			echo "class = '".pg_escape_string($aPair[0])."' and type = '".pg_escape_string($aPair[1])."';\n";
 
 			echo "CREATE INDEX idx_place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])."_centroid ";
 			echo "ON place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])." USING GIST (centroid);\n";
@@ -95,10 +97,9 @@
 			echo "CREATE INDEX idx_place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])."_place_id ";
 			echo "ON place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])." USING btree(place_id);\n";
 
-			echo "truncate place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1]).";\n";
-			echo "insert into place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])." ";
-			echo "select place_id as place_id,st_centroid(geometry) as centroid from placex where ";
-			echo "class = '".pg_escape_string($aPair[0])."' and type = '".pg_escape_string($aPair[1])."';\n";
+            echo "GRANT SELECT ON place_classtype_".pg_escape_string($aPair[0])."_".pg_escape_string($aPair[1])." TO \"www-data\";";
 
 		}
+
+        echo "drop index idx_placex_classtype;";
 	}