5 require_once(CONST_LibDir.'/DatabaseError.php');
8 * Uses PDO to access the database specified in the CONST_Database_DSN
13 protected $connection;
15 public function __construct($sDSN = null)
17 $this->sDSN = $sDSN ?? getSetting('DATABASE_DSN');
20 public function connect($bNew = false, $bPersistent = true)
22 if (isset($this->connection) && !$bNew) {
25 $aConnOptions = array(
26 \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
27 \PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
28 \PDO::ATTR_PERSISTENT => $bPersistent
31 // https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
33 $conn = new \PDO($this->sDSN, null, null, $aConnOptions);
34 } catch (\PDOException $e) {
35 $sMsg = 'Failed to establish database connection:' . $e->getMessage();
36 throw new \Nominatim\DatabaseError($sMsg, 500, null, $e->getMessage());
39 $conn->exec("SET DateStyle TO 'sql,european'");
40 $conn->exec("SET client_encoding TO 'utf-8'");
41 $iMaxExecution = ini_get('max_execution_time');
42 if ($iMaxExecution > 0) $conn->setAttribute(\PDO::ATTR_TIMEOUT, $iMaxExecution); // seconds
44 $this->connection = $conn;
48 // returns the number of rows that were modified or deleted by the SQL
49 // statement. If no rows were affected returns 0.
50 public function exec($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
54 if (isset($aInputVars)) {
55 $stmt = $this->connection->prepare($sSQL);
56 $stmt->execute($aInputVars);
58 $val = $this->connection->exec($sSQL);
60 } catch (\PDOException $e) {
61 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
67 * Executes query. Returns first row as array.
68 * Returns false if no result found.
74 public function getRow($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
77 $stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
78 $row = $stmt->fetch();
79 } catch (\PDOException $e) {
80 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
86 * Executes query. Returns first value of first result.
87 * Returns false if no results found.
93 public function getOne($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
96 $stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
97 $row = $stmt->fetch(\PDO::FETCH_NUM);
98 if ($row === false) return false;
99 } catch (\PDOException $e) {
100 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
106 * Executes query. Returns array of results (arrays).
107 * Returns empty array if no results found.
109 * @param string $sSQL
113 public function getAll($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
116 $stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
117 $rows = $stmt->fetchAll();
118 } catch (\PDOException $e) {
119 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
125 * Executes query. Returns array of the first value of each result.
126 * Returns empty array if no results found.
128 * @param string $sSQL
132 public function getCol($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
136 $stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
138 while (($val = $stmt->fetchColumn(0)) !== false) { // returns first column or false
141 } catch (\PDOException $e) {
142 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
148 * Executes query. Returns associate array mapping first value to second value of each result.
149 * Returns empty array if no results found.
151 * @param string $sSQL
155 public function getAssoc($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
158 $stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
161 while ($aRow = $stmt->fetch(\PDO::FETCH_NUM)) {
162 $aList[$aRow[0]] = $aRow[1];
164 } catch (\PDOException $e) {
165 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
171 * Executes query. Returns a PDO statement to iterate over.
173 * @param string $sSQL
175 * @return PDOStatement
177 public function getQueryStatement($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
180 if (isset($aInputVars)) {
181 $stmt = $this->connection->prepare($sSQL);
182 $stmt->execute($aInputVars);
184 $stmt = $this->connection->query($sSQL);
186 } catch (\PDOException $e) {
187 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
193 * St. John's Way => 'St. John\'s Way'
195 * @param string $sVal Text to be quoted.
199 public function getDBQuoted($sVal)
201 return $this->connection->quote($sVal);
205 * Like getDBQuoted, but takes an array.
207 * @param array $aVals List of text to be quoted.
211 public function getDBQuotedList($aVals)
213 return array_map(function ($sVal) {
214 return $this->getDBQuoted($sVal);
219 * [1,2,'b'] => 'ARRAY[1,2,'b']''
221 * @param array $aVals List of text to be quoted.
225 public function getArraySQL($a)
227 return 'ARRAY['.join(',', $a).']';
231 * Check if a table exists in the database. Returns true if it does.
233 * @param string $sTableName
237 public function tableExists($sTableName)
239 $sSQL = 'SELECT count(*) FROM pg_tables WHERE tablename = :tablename';
240 return ($this->getOne($sSQL, array(':tablename' => $sTableName)) == 1);
244 * Returns a list of table names in the database
248 public function getListOfTables()
250 return $this->getCol("SELECT tablename FROM pg_tables WHERE schemaname='public'");
254 * Deletes a table. Returns true if deleted or didn't exist.
256 * @param string $sTableName
260 public function deleteTable($sTableName)
262 return $this->exec('DROP TABLE IF EXISTS '.$sTableName.' CASCADE') == 0;
266 * Check if an index exists in the database. Optional filtered by tablename
268 * @param string $sTableName
272 public function indexExists($sIndexName, $sTableName = null)
274 return in_array($sIndexName, $this->getListOfIndices($sTableName));
278 * Returns a list of index names in the database, optional filtered by tablename
280 * @param string $sTableName
284 public function getListOfIndices($sTableName = null)
286 // table_name | index_name | column_name
287 // -----------------------+---------------------------------+--------------
288 // country_name | idx_country_name_country_code | country_code
289 // country_osm_grid | idx_country_osm_grid_geometry | geometry
290 // import_polygon_delete | idx_import_polygon_delete_osmid | osm_id
291 // import_polygon_delete | idx_import_polygon_delete_osmid | osm_type
292 // import_polygon_error | idx_import_polygon_error_osmid | osm_id
293 // import_polygon_error | idx_import_polygon_error_osmid | osm_type
296 t.relname as table_name,
297 i.relname as index_name,
298 a.attname as column_name
306 and i.oid = ix.indexrelid
307 and a.attrelid = t.oid
308 and a.attnum = ANY(ix.indkey)
310 and i.relname NOT LIKE 'pg_%'
320 $sSql = str_replace('FILTERS', 'and t.relname = :tablename', $sSql);
321 $aRows = $this->getAll($sSql, array(':tablename' => $sTableName));
323 $sSql = str_replace('FILTERS', '', $sSql);
324 $aRows = $this->getAll($sSql);
327 $aIndexNames = array_unique(array_map(function ($aRow) {
328 return $aRow['index_name'];
336 * Tries to connect to the database but on failure doesn't throw an exception.
340 public function checkConnection()
344 $this->connect(true);
345 } catch (\Nominatim\DatabaseError $e) {
356 public function getPostgresVersion()
358 $sVersionString = $this->getOne('SHOW server_version_num');
359 preg_match('#([0-9]?[0-9])([0-9][0-9])[0-9][0-9]#', $sVersionString, $aMatches);
360 return (float) ($aMatches[1].'.'.$aMatches[2]);
368 public function getPostgisVersion()
370 $sVersionString = $this->getOne('select postgis_lib_version()');
371 preg_match('#^([0-9]+)[.]([0-9]+)[.]#', $sVersionString, $aMatches);
372 return (float) ($aMatches[1].'.'.$aMatches[2]);
376 * Returns an associate array of postgresql database connection settings. Keys can
377 * be 'database', 'hostspec', 'port', 'username', 'password'.
378 * Returns empty array on failure, thus check if at least 'database' is set.
382 public static function parseDSN($sDSN)
384 // https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
386 if (preg_match('/^pgsql:(.+)$/', $sDSN, $aMatches)) {
387 foreach (explode(';', $aMatches[1]) as $sKeyVal) {
388 list($sKey, $sVal) = explode('=', $sKeyVal, 2);
389 if ($sKey == 'host') $sKey = 'hostspec';
390 if ($sKey == 'dbname') $sKey = 'database';
391 if ($sKey == 'user') $sKey = 'username';
392 $aInfo[$sKey] = $sVal;
399 * Takes an array of settings and return the DNS string. Key names can be
400 * 'database', 'hostspec', 'port', 'username', 'password' but aliases
401 * 'dbname', 'host' and 'user' are also supported.
406 public static function generateDSN($aInfo)
409 'pgsql:host=%s;port=%s;dbname=%s;user=%s;password=%s;',
410 $aInfo['host'] ?? $aInfo['hostspec'] ?? '',
411 $aInfo['port'] ?? '',
412 $aInfo['dbname'] ?? $aInfo['database'] ?? '',
413 $aInfo['user'] ?? '',
414 $aInfo['password'] ?? ''
416 $sDSN = preg_replace('/\b\w+=;/', '', $sDSN);
417 $sDSN = preg_replace('/;\Z/', '', $sDSN);