Merge remote-tracking branch 'upstream/master'

[nominatim.git] / lib / Geocode.php

diff --git a/lib/Geocode.php b/lib/Geocode.php
index 1dd5a0e5ea3dd484d963d362959d2aafeae369c1..12410acc81a03373bdbd9e44d1dbee84daf13307 100644 (file)
--- a/lib/Geocode.php
+++ b/lib/Geocode.php
@@ -348,10 +348,7 @@ class Geocode
             $aNewPhraseSearches = array();
             $sPhraseType = $bIsStructured ? $oPhrase->getPhraseType() : '';
 
-            foreach ($oPhrase->getWordSets() as $iWordSet => $aWordset) {
-                // Too many permutations - too expensive
-                if ($iWordSet > 120) break;
-
+            foreach ($oPhrase->getWordSets() as $aWordset) {
                 $aWordsetSearches = $aSearches;
 
                 // Add all words from this wordset
@@ -527,8 +524,8 @@ class Geocode
         $sNormQuery = $this->normTerm($this->sQuery);
         Debug::printVar('Normalized query', $sNormQuery);
 
-        $sLanguagePrefArraySQL = getArraySQL(
-            array_map('getDBQuoted', $this->aLangPrefOrder)
+        $sLanguagePrefArraySQL = $this->oDB->getArraySQL(
+            $this->oDB->getDBQuotedList($this->aLangPrefOrder)
         );
 
         $sQuery = $this->sQuery;
@@ -546,7 +543,6 @@ class Geocode
         // Do we have anything that looks like a lat/lon pair?
         $sQuery = $oCtx->setNearPointFromQuery($sQuery);
 
-        $aResults = array();
         if ($sQuery || $this->aStructuredQuery) {
             // Start with a single blank search
             $aSearches = array(new SearchDescription($oCtx));
@@ -582,8 +578,9 @@ class Geocode
 
             if ($sSpecialTerm && !$aSearches[0]->hasOperator()) {
                 $sSpecialTerm = pg_escape_string($sSpecialTerm);
-                $sToken = chksql(
-                    $this->oDB->getOne("SELECT make_standard_name('$sSpecialTerm')"),
+                $sToken = $this->oDB->getOne(
+                    'SELECT make_standard_name(:term)',
+                    array(':term' => $sSpecialTerm),
                     'Cannot decode query. Wrong encoding?'
                 );
                 $sSQL = 'SELECT class, type FROM word ';
@@ -591,7 +588,7 @@ class Geocode
                 $sSQL .= '   AND class is not null AND class not in (\'place\')';
 
                 Debug::printSQL($sSQL);
-                $aSearchWords = chksql($this->oDB->getAll($sSQL));
+                $aSearchWords = $this->oDB->getAll($sSQL);
                 $aNewSearches = array();
                 foreach ($aSearches as $oSearch) {
                     foreach ($aSearchWords as $aSearchTerm) {
@@ -629,8 +626,9 @@ class Geocode
             $aTokens = array();
             $aPhrases = array();
             foreach ($aInPhrases as $iPhrase => $sPhrase) {
-                $sPhrase = chksql(
-                    $this->oDB->getOne('SELECT make_standard_name('.getDBQuoted($sPhrase).')'),
+                $sPhrase = $this->oDB->getOne(
+                    'SELECT make_standard_name(:phrase)',
+                    array(':phrase' => $sPhrase),
                     'Cannot normalize query string (is it a UTF-8 string?)'
                 );
                 if (trim($sPhrase)) {
@@ -640,7 +638,6 @@ class Geocode
                 }
             }
 
-            Debug::printDebugTable('Phrases', $aPhrases);
             Debug::printVar('Tokens', $aTokens);
 
             $oValidTokens = new TokenList();
@@ -648,7 +645,7 @@ class Geocode
             if (!empty($aTokens)) {
                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
                 $sSQL .= ' FROM word ';
-                $sSQL .= ' WHERE word_token in ('.join(',', array_map('getDBQuoted', $aTokens)).')';
+                $sSQL .= ' WHERE word_token in ('.join(',', $this->oDB->getDBQuotedList($aTokens)).')';
 
                 Debug::printSQL($sSQL);
 
@@ -685,6 +682,11 @@ class Geocode
 
                 Debug::printGroupTable('Valid Tokens', $oValidTokens->debugInfo());
 
+                foreach ($aPhrases as $oPhrase) {
+                    $oPhrase->computeWordSets($oValidTokens);
+                }
+                Debug::printDebugTable('Phrases', $aPhrases);
+
                 Debug::newSection('Search candidates');
 
                 $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $oValidTokens, $bStructuredPhrases);
@@ -746,8 +748,10 @@ class Geocode
             // Start the search process
             $iGroupLoop = 0;
             $iQueryLoop = 0;
+            $aNextResults = array();
             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
                 $iGroupLoop++;
+                $aResults = $aNextResults;
                 foreach ($aSearches as $oSearch) {
                     $iQueryLoop++;
 
@@ -757,16 +761,42 @@ class Geocode
                         $oValidTokens->debugTokenByWordIdList()
                     );
 
-                    $aResults += $oSearch->query(
+                    $aNewResults = $oSearch->query(
                         $this->oDB,
                         $this->iMinAddressRank,
                         $this->iMaxAddressRank,
                         $this->iLimit
                     );
 
+                    // The same result may appear in different rounds, only
+                    // use the one with minimal rank.
+                    foreach ($aNewResults as $iPlace => $oRes) {
+                        if (!isset($aResults[$iPlace])
+                            || $aResults[$iPlace]->iResultRank > $oRes->iResultRank) {
+                            $aResults[$iPlace] = $oRes;
+                        }
+                    }
+
                     if ($iQueryLoop > 20) break;
                 }
 
+                if (!empty($aResults)) {
+                    $aSplitResults = Result::splitResults($aResults);
+                    Debug::printVar('Split results', $aSplitResults);
+                    if ($iGroupLoop <= 4 && empty($aSplitResults['tail'])
+                        && reset($aSplitResults['head'])->iResultRank > 0) {
+                        // Haven't found an exact match for the query yet.
+                        // Therefore add result from the next group level.
+                        $aNextResults = $aSplitResults['head'];
+                        foreach ($aNextResults as $oRes) {
+                            $oRes->iResultRank--;
+                        }
+                        $aResults = array();
+                    } else {
+                        $aResults = $aSplitResults['head'];
+                    }
+                }
+
                 if (!empty($aResults) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
                     // reduces the number of place ids, like a filter
@@ -803,7 +833,7 @@ class Geocode
                     if ($aFilterSql) {
                         $sSQL = join(' UNION ', $aFilterSql);
                         Debug::printSQL($sSQL);
-                        $aFilteredIDs = chksql($this->oDB->getCol($sSQL));
+                        $aFilteredIDs = $this->oDB->getCol($sSQL);
                     }
 
                     $tempIDs = array();