mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-11-28 14:22:19 +03:00
15a1666f8a
As we can't refer to the project root dir in the module path, the module path may now also be a relative directory which is then taken as being relative to the project root path. Moves the checkModulePresence() function into the Setup class, so that it can work on the computed absolute module path.
422 lines
12 KiB
PHP
422 lines
12 KiB
PHP
<?php
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namespace Nominatim;
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require_once(CONST_LibDir.'/DatabaseError.php');
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/**
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* Uses PDO to access the database specified in the CONST_Database_DSN
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* setting.
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*/
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class DB
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{
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protected $connection;
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public function __construct($sDSN = null)
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{
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$this->sDSN = $sDSN ?? getSetting('DATABASE_DSN');
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}
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public function connect($bNew = false, $bPersistent = true)
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{
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if (isset($this->connection) && !$bNew) {
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return true;
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}
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$aConnOptions = array(
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\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
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\PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
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\PDO::ATTR_PERSISTENT => $bPersistent
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);
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// https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
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try {
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$conn = new \PDO($this->sDSN, null, null, $aConnOptions);
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} catch (\PDOException $e) {
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$sMsg = 'Failed to establish database connection:' . $e->getMessage();
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throw new \Nominatim\DatabaseError($sMsg, 500, null, $e->getMessage());
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}
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$conn->exec("SET DateStyle TO 'sql,european'");
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$conn->exec("SET client_encoding TO 'utf-8'");
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$iMaxExecution = ini_get('max_execution_time');
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if ($iMaxExecution > 0) $conn->setAttribute(\PDO::ATTR_TIMEOUT, $iMaxExecution); // seconds
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$this->connection = $conn;
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return true;
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}
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// returns the number of rows that were modified or deleted by the SQL
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// statement. If no rows were affected returns 0.
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public function exec($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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$val = null;
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try {
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if (isset($aInputVars)) {
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$stmt = $this->connection->prepare($sSQL);
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$stmt->execute($aInputVars);
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} else {
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$val = $this->connection->exec($sSQL);
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}
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $val;
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}
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/**
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* Executes query. Returns first row as array.
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* Returns false if no result found.
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*
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* @param string $sSQL
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*
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* @return array[]
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*/
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public function getRow($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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try {
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$stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
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$row = $stmt->fetch();
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $row;
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}
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/**
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* Executes query. Returns first value of first result.
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* Returns false if no results found.
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*
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* @param string $sSQL
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*
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* @return array[]
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*/
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public function getOne($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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try {
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$stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
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$row = $stmt->fetch(\PDO::FETCH_NUM);
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if ($row === false) return false;
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $row[0];
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}
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/**
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* Executes query. Returns array of results (arrays).
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* Returns empty array if no results found.
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*
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* @param string $sSQL
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*
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* @return array[]
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*/
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public function getAll($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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try {
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$stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
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$rows = $stmt->fetchAll();
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $rows;
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}
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/**
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* Executes query. Returns array of the first value of each result.
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* Returns empty array if no results found.
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*
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* @param string $sSQL
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*
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* @return array[]
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*/
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public function getCol($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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$aVals = array();
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try {
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$stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
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while (($val = $stmt->fetchColumn(0)) !== false) { // returns first column or false
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$aVals[] = $val;
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}
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $aVals;
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}
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/**
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* Executes query. Returns associate array mapping first value to second value of each result.
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* Returns empty array if no results found.
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*
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* @param string $sSQL
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*
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* @return array[]
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*/
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public function getAssoc($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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try {
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$stmt = $this->getQueryStatement($sSQL, $aInputVars, $sErrMessage);
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$aList = array();
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while ($aRow = $stmt->fetch(\PDO::FETCH_NUM)) {
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$aList[$aRow[0]] = $aRow[1];
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}
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $aList;
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}
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/**
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* Executes query. Returns a PDO statement to iterate over.
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*
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* @param string $sSQL
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*
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* @return PDOStatement
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*/
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public function getQueryStatement($sSQL, $aInputVars = null, $sErrMessage = 'Database query failed')
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{
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try {
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if (isset($aInputVars)) {
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$stmt = $this->connection->prepare($sSQL);
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$stmt->execute($aInputVars);
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} else {
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$stmt = $this->connection->query($sSQL);
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}
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} catch (\PDOException $e) {
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throw new \Nominatim\DatabaseError($sErrMessage, 500, null, $e, $sSQL);
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}
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return $stmt;
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}
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/**
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* St. John's Way => 'St. John\'s Way'
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*
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* @param string $sVal Text to be quoted.
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*
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* @return string
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*/
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public function getDBQuoted($sVal)
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{
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return $this->connection->quote($sVal);
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}
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/**
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* Like getDBQuoted, but takes an array.
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*
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* @param array $aVals List of text to be quoted.
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*
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* @return array[]
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*/
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public function getDBQuotedList($aVals)
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{
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return array_map(function ($sVal) {
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return $this->getDBQuoted($sVal);
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}, $aVals);
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}
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/**
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* [1,2,'b'] => 'ARRAY[1,2,'b']''
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*
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* @param array $aVals List of text to be quoted.
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*
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* @return string
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*/
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public function getArraySQL($a)
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{
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return 'ARRAY['.join(',', $a).']';
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}
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/**
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* Check if a table exists in the database. Returns true if it does.
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*
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* @param string $sTableName
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*
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* @return boolean
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*/
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public function tableExists($sTableName)
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{
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$sSQL = 'SELECT count(*) FROM pg_tables WHERE tablename = :tablename';
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return ($this->getOne($sSQL, array(':tablename' => $sTableName)) == 1);
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}
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/**
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* Returns a list of table names in the database
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*
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* @return array[]
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*/
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public function getListOfTables()
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{
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return $this->getCol("SELECT tablename FROM pg_tables WHERE schemaname='public'");
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}
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/**
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* Deletes a table. Returns true if deleted or didn't exist.
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*
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* @param string $sTableName
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*
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* @return boolean
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*/
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public function deleteTable($sTableName)
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{
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return $this->exec('DROP TABLE IF EXISTS '.$sTableName.' CASCADE') == 0;
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}
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/**
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* Check if an index exists in the database. Optional filtered by tablename
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*
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* @param string $sTableName
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*
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* @return boolean
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*/
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public function indexExists($sIndexName, $sTableName = null)
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{
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return in_array($sIndexName, $this->getListOfIndices($sTableName));
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}
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/**
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* Returns a list of index names in the database, optional filtered by tablename
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*
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* @param string $sTableName
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*
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* @return array
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*/
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public function getListOfIndices($sTableName = null)
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{
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// table_name | index_name | column_name
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// -----------------------+---------------------------------+--------------
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// country_name | idx_country_name_country_code | country_code
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// country_osm_grid | idx_country_osm_grid_geometry | geometry
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// import_polygon_delete | idx_import_polygon_delete_osmid | osm_id
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// import_polygon_delete | idx_import_polygon_delete_osmid | osm_type
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// import_polygon_error | idx_import_polygon_error_osmid | osm_id
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// import_polygon_error | idx_import_polygon_error_osmid | osm_type
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$sSql = <<< END
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SELECT
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t.relname as table_name,
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i.relname as index_name,
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a.attname as column_name
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FROM
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pg_class t,
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pg_class i,
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pg_index ix,
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pg_attribute a
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WHERE
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t.oid = ix.indrelid
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and i.oid = ix.indexrelid
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and a.attrelid = t.oid
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and a.attnum = ANY(ix.indkey)
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and t.relkind = 'r'
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and i.relname NOT LIKE 'pg_%'
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FILTERS
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ORDER BY
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t.relname,
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i.relname,
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a.attname
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END;
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$aRows = null;
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if ($sTableName) {
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$sSql = str_replace('FILTERS', 'and t.relname = :tablename', $sSql);
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$aRows = $this->getAll($sSql, array(':tablename' => $sTableName));
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} else {
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$sSql = str_replace('FILTERS', '', $sSql);
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$aRows = $this->getAll($sSql);
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}
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$aIndexNames = array_unique(array_map(function ($aRow) {
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return $aRow['index_name'];
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}, $aRows));
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sort($aIndexNames);
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return $aIndexNames;
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}
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/**
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* Tries to connect to the database but on failure doesn't throw an exception.
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*
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* @return boolean
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*/
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public function checkConnection()
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{
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$bExists = true;
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try {
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$this->connect(true);
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} catch (\Nominatim\DatabaseError $e) {
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$bExists = false;
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}
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return $bExists;
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}
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/**
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* e.g. 9.6, 10, 11.2
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*
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* @return float
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*/
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public function getPostgresVersion()
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{
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$sVersionString = $this->getOne('SHOW server_version_num');
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preg_match('#([0-9]?[0-9])([0-9][0-9])[0-9][0-9]#', $sVersionString, $aMatches);
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return (float) ($aMatches[1].'.'.$aMatches[2]);
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}
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/**
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* e.g. 2, 2.2
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*
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* @return float
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*/
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public function getPostgisVersion()
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{
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$sVersionString = $this->getOne('select postgis_lib_version()');
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preg_match('#^([0-9]+)[.]([0-9]+)[.]#', $sVersionString, $aMatches);
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return (float) ($aMatches[1].'.'.$aMatches[2]);
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}
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/**
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* Returns an associate array of postgresql database connection settings. Keys can
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* be 'database', 'hostspec', 'port', 'username', 'password'.
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* Returns empty array on failure, thus check if at least 'database' is set.
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*
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* @return array[]
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*/
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public static function parseDSN($sDSN)
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{
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// https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
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$aInfo = array();
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if (preg_match('/^pgsql:(.+)$/', $sDSN, $aMatches)) {
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foreach (explode(';', $aMatches[1]) as $sKeyVal) {
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list($sKey, $sVal) = explode('=', $sKeyVal, 2);
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if ($sKey == 'host') $sKey = 'hostspec';
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if ($sKey == 'dbname') $sKey = 'database';
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if ($sKey == 'user') $sKey = 'username';
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$aInfo[$sKey] = $sVal;
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}
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}
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return $aInfo;
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}
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/**
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* Takes an array of settings and return the DNS string. Key names can be
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* 'database', 'hostspec', 'port', 'username', 'password' but aliases
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* 'dbname', 'host' and 'user' are also supported.
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*
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* @return string
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*
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*/
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public static function generateDSN($aInfo)
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{
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$sDSN = sprintf(
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'pgsql:host=%s;port=%s;dbname=%s;user=%s;password=%s;',
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$aInfo['host'] ?? $aInfo['hostspec'] ?? '',
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$aInfo['port'] ?? '',
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$aInfo['dbname'] ?? $aInfo['database'] ?? '',
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$aInfo['user'] ?? '',
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$aInfo['password'] ?? ''
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);
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$sDSN = preg_replace('/\b\w+=;/', '', $sDSN);
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$sDSN = preg_replace('/;\Z/', '', $sDSN);
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return $sDSN;
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}
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}
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