deduplicate words: do not look for duplicates in empty partitions

[nominatim.git] / utils / update.php

diff --git a/utils/update.php b/utils/update.php
index 232a23c97dc57dca322381e14da2b3d282d268b8..d8ac134add94d52c2894a59a1e59569f2296750f 100755 (executable)
--- a/utils/update.php
+++ b/utils/update.php
@@ -156,16 +156,25 @@ if ($bHaveDiff) {
 }
 
 if ($aResult['deduplicate']) {
-    //
-    if (getPostgresVersion() < 9.3) {
+    $oDB =& getDB();
+
+    if (getPostgresVersion($oDB) < 9.3) {
         fail("ERROR: deduplicate is only currently supported in postgresql 9.3");
     }
 
-    $oDB =& getDB();
     $sSQL = 'select partition from country_name order by country_code';
     $aPartitions = chksql($oDB->getCol($sSQL));
     $aPartitions[] = 0;
 
+    // we don't care about empty search_name_* artitions, they can't contain mentions of duplicates
+    foreach ($aPartitions as $i => $sPartition) {
+        $sSQL = "select count(*) from search_name_".$sPartition;
+        $nEntries = chksql($oDB->getOne($sSQL));
+        if ($nEntries == 0) {
+            unset($aPartitions[$i]);
+        }
+    }
+
     $sSQL = "select word_token,count(*) from word where substr(word_token, 1, 1) = ' '";
     $sSQL .= " and class is null and type is null and country_code is null";
     $sSQL .= " group by word_token having count(*) > 1 order by word_token";