5 require_once(CONST_BasePath.'/lib/DatabaseError.php');
8 * Uses PDO to access the database specified in the CONST_Database_DSN
13 protected $connection;
15 public function __construct($sDSN = CONST_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, $sErrMessage = 'Database query failed')
77 if (isset($aInputVars)) {
78 $stmt = $this->connection->prepare($sSQL);
79 $stmt->execute($aInputVars);
81 $stmt = $this->connection->query($sSQL);
83 $row = $stmt->fetch();
84 } catch (\PDOException $e) {
85 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
91 * Executes query. Returns first value of first result.
92 * Returns false if no results found.
98 public function getOne($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
101 if (isset($aInputVars)) {
102 $stmt = $this->connection->prepare($sSQL);
103 $stmt->execute($aInputVars);
105 $stmt = $this->connection->query($sSQL);
107 $row = $stmt->fetch(\PDO::FETCH_NUM);
108 if ($row === false) return false;
109 } catch (\PDOException $e) {
110 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
116 * Executes query. Returns array of results (arrays).
117 * Returns empty array if no results found.
119 * @param string $sSQL
123 public function getAll($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
126 if (isset($aInputVars)) {
127 $stmt = $this->connection->prepare($sSQL);
128 $stmt->execute($aInputVars);
130 $stmt = $this->connection->query($sSQL);
132 $rows = $stmt->fetchAll();
133 } catch (\PDOException $e) {
134 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
140 * Executes query. Returns array of the first value of each result.
141 * Returns empty array if no results found.
143 * @param string $sSQL
147 public function getCol($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
151 if (isset($aInputVars)) {
152 $stmt = $this->connection->prepare($sSQL);
153 $stmt->execute($aInputVars);
155 $stmt = $this->connection->query($sSQL);
157 while ($val = $stmt->fetchColumn(0)) { // returns first column or false
160 } catch (\PDOException $e) {
161 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
167 * Executes query. Returns associate array mapping first value to second value of each result.
168 * Returns empty array if no results found.
170 * @param string $sSQL
174 public function getAssoc($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
177 if (isset($aInputVars)) {
178 $stmt = $this->connection->prepare($sSQL);
179 $stmt->execute($aInputVars);
181 $stmt = $this->connection->query($sSQL);
184 while ($aRow = $stmt->fetch(\PDO::FETCH_NUM)) {
185 $aList[$aRow[0]] = $aRow[1];
187 } catch (\PDOException $e) {
188 throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
195 * St. John's Way => 'St. John\'s Way'
197 * @param string $sVal Text to be quoted.
201 public function getDBQuoted($sVal)
203 return $this->connection->quote($sVal);
207 * Like getDBQuoted, but takes an array.
209 * @param array $aVals List of text to be quoted.
213 public function getDBQuotedList($aVals)
215 return array_map(function ($sVal) {
216 return $this->getDBQuoted($sVal);
221 * [1,2,'b'] => 'ARRAY[1,2,'b']''
223 * @param array $aVals List of text to be quoted.
227 public function getArraySQL($a)
229 return 'ARRAY['.join(',', $a).']';
233 * Check if a table exists in the database. Returns true if it does.
235 * @param string $sTableName
239 public function tableExists($sTableName)
241 $sSQL = 'SELECT count(*) FROM pg_tables WHERE tablename = :tablename';
242 return ($this->getOne($sSQL, array(':tablename' => $sTableName)) == 1);
246 * Since the DSN includes the database name, checks if the connection works.
250 public function databaseExists()
254 $this->connect(true);
255 } catch (\Nominatim\DatabaseError $e) {
266 public function getPostgresVersion()
268 $sVersionString = $this->getOne('SHOW server_version_num');
269 preg_match('#([0-9]?[0-9])([0-9][0-9])[0-9][0-9]#', $sVersionString, $aMatches);
270 return (float) ($aMatches[1].'.'.$aMatches[2]);
278 public function getPostgisVersion()
280 $sVersionString = $this->getOne('select postgis_lib_version()');
281 preg_match('#^([0-9]+)[.]([0-9]+)[.]#', $sVersionString, $aMatches);
282 return (float) ($aMatches[1].'.'.$aMatches[2]);
285 public static function parseDSN($sDSN)
287 // https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
289 if (preg_match('/^pgsql:(.+)/', $sDSN, $aMatches)) {
290 foreach (explode(';', $aMatches[1]) as $sKeyVal) {
291 list($sKey, $sVal) = explode('=', $sKeyVal, 2);
292 if ($sKey == 'host') $sKey = 'hostspec';
293 if ($sKey == 'dbname') $sKey = 'database';
294 if ($sKey == 'user') $sKey = 'username';
295 $aInfo[$sKey] = $sVal;