1645 lines
41 KiB
PHP
1645 lines
41 KiB
PHP
<?php
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namespace Friendica\Database;
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use Friendica\Core\Config\Cache\IConfigCache;
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use Friendica\Core\System;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Profiler;
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use mysqli;
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use mysqli_result;
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use mysqli_stmt;
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use ParagonIE\HiddenString\HiddenString;
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use PDO;
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use PDOException;
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use PDOStatement;
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use Psr\Log\LoggerInterface;
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/**
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* @class MySQL database class
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*
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* This class is for the low level database stuff that does driver specific things.
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*/
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class Database
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{
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private $connected = false;
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/**
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* @var IConfigCache
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*/
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private $configCache;
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/**
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* @var Profiler
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*/
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private $profiler;
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/**
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* @var LoggerInterface
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*/
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private $logger;
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private $server_info = '';
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/** @var PDO|mysqli */
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private $connection;
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private $driver;
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private $error = false;
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private $errorno = 0;
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private $affected_rows = 0;
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private $in_transaction = false;
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private $in_retrial = false;
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private $relation = [];
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private $db_serveraddr;
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private $db_user;
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/**
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* @var HiddenString
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*/
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private $db_pass;
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private $db_name;
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private $db_charset;
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public function __construct(IConfigCache $configCache, Profiler $profiler, LoggerInterface $logger, $serveraddr, $user, HiddenString $pass, $db, $charset = null)
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{
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// We are storing these values for being able to perform a reconnect
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$this->configCache = $configCache;
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$this->profiler = $profiler;
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$this->logger = $logger;
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$this->db_serveraddr = $serveraddr;
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$this->db_user = $user;
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$this->db_pass = $pass;
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$this->db_name = $db;
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$this->db_charset = $charset;
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$this->connect();
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DBA::init($this);
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}
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public function connect()
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{
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if (!is_null($this->connection) && $this->connected()) {
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return true;
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}
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$port = 0;
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$serveraddr = trim($this->db_serveraddr);
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$serverdata = explode(':', $serveraddr);
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$server = $serverdata[0];
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if (count($serverdata) > 1) {
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$port = trim($serverdata[1]);
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}
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$server = trim($server);
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$user = trim($this->db_user);
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$pass = trim($this->db_pass);
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$db = trim($this->db_name);
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$charset = trim($this->db_charset);
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if (!(strlen($server) && strlen($user))) {
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return false;
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}
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if (class_exists('\PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
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$this->driver = 'pdo';
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$connect = "mysql:host=" . $server . ";dbname=" . $db;
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if ($port > 0) {
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$connect .= ";port=" . $port;
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}
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if ($charset) {
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$connect .= ";charset=" . $charset;
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}
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try {
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$this->connection = @new PDO($connect, $user, $pass);
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$this->connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
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$this->connected = true;
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} catch (PDOException $e) {
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/// @TODO At least log exception, don't ignore it!
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}
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}
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if (!$this->connected && class_exists('\mysqli')) {
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$this->driver = 'mysqli';
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if ($port > 0) {
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$this->connection = @new mysqli($server, $user, $pass, $db, $port);
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} else {
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$this->connection = @new mysqli($server, $user, $pass, $db);
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}
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if (!mysqli_connect_errno()) {
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$this->connected = true;
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if ($charset) {
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$this->connection->set_charset($charset);
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}
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}
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}
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// No suitable SQL driver was found.
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if (!$this->connected) {
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$this->driver = null;
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$this->connection = null;
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}
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return $this->connected;
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}
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/**
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* Sets the logger for DBA
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*
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* @note this is necessary because if we want to load the logger configuration
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* from the DB, but there's an error, we would print out an exception.
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* So the logger gets updated after the logger configuration can be retrieved
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* from the database
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*
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* @param LoggerInterface $logger
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*/
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public function setLogger(LoggerInterface $logger)
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{
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$this->logger = $logger;
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}
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/**
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* Disconnects the current database connection
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*/
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public function disconnect()
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{
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if (is_null($this->connection)) {
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return;
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}
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switch ($this->driver) {
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case 'pdo':
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$this->connection = null;
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break;
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case 'mysqli':
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$this->connection->close();
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$this->connection = null;
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break;
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}
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}
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/**
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* Perform a reconnect of an existing database connection
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*/
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public function reconnect()
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{
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$this->disconnect();
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return $this->connect();
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}
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/**
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* Return the database object.
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*
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* @return PDO|mysqli
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*/
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public function getConnection()
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{
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return $this->connection;
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}
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/**
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* @brief Returns the MySQL server version string
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*
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* This function discriminate between the deprecated mysql API and the current
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* object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
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*
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* @return string
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*/
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public function serverInfo()
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{
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if ($this->server_info == '') {
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switch ($this->driver) {
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case 'pdo':
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$this->server_info = $this->connection->getAttribute(PDO::ATTR_SERVER_VERSION);
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break;
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case 'mysqli':
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$this->server_info = $this->connection->server_info;
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break;
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}
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}
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return $this->server_info;
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}
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/**
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* @brief Returns the selected database name
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*
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* @return string
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* @throws \Exception
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*/
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public function databaseName()
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{
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$ret = $this->p("SELECT DATABASE() AS `db`");
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$data = $this->toArray($ret);
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return $data[0]['db'];
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}
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/**
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* @brief Analyze a database query and log this if some conditions are met.
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*
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* @param string $query The database query that will be analyzed
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*
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* @throws \Exception
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*/
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private function logIndex($query)
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{
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if (!$this->configCache->get('system', 'db_log_index')) {
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return;
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}
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// Don't explain an explain statement
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if (strtolower(substr($query, 0, 7)) == "explain") {
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return;
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}
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// Only do the explain on "select", "update" and "delete"
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if (!in_array(strtolower(substr($query, 0, 6)), ["select", "update", "delete"])) {
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return;
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}
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$r = $this->p("EXPLAIN " . $query);
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if (!$this->isResult($r)) {
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return;
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}
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$watchlist = explode(',', $this->configCache->get('system', 'db_log_index_watch'));
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$blacklist = explode(',', $this->configCache->get('system', 'db_log_index_blacklist'));
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while ($row = $this->fetch($r)) {
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if ((intval($this->configCache->get('system', 'db_loglimit_index')) > 0)) {
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$log = (in_array($row['key'], $watchlist) &&
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($row['rows'] >= intval($this->configCache->get('system', 'db_loglimit_index'))));
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} else {
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$log = false;
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}
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if ((intval($this->configCache->get('system', 'db_loglimit_index_high')) > 0) && ($row['rows'] >= intval($this->configCache->get('system', 'db_loglimit_index_high')))) {
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$log = true;
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}
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if (in_array($row['key'], $blacklist) || ($row['key'] == "")) {
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$log = false;
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}
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if ($log) {
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$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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@file_put_contents($this->configCache->get('system', 'db_log_index'), DateTimeFormat::utcNow() . "\t" .
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$row['key'] . "\t" . $row['rows'] . "\t" . $row['Extra'] . "\t" .
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basename($backtrace[1]["file"]) . "\t" .
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$backtrace[1]["line"] . "\t" . $backtrace[2]["function"] . "\t" .
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substr($query, 0, 2000) . "\n", FILE_APPEND);
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}
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}
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}
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/**
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* Removes every not whitelisted character from the identifier string
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*
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* @param string $identifier
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*
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* @return string sanitized identifier
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* @throws \Exception
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*/
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private function sanitizeIdentifier($identifier)
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{
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return preg_replace('/[^A-Za-z0-9_\-]+/', '', $identifier);
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}
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public function escape($str)
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{
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if ($this->connected) {
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switch ($this->driver) {
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case 'pdo':
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return substr(@$this->connection->quote($str, PDO::PARAM_STR), 1, -1);
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case 'mysqli':
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return @$this->connection->real_escape_string($str);
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}
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} else {
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return str_replace("'", "\\'", $str);
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}
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}
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public function connected()
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{
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$connected = false;
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if (is_null($this->connection)) {
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return false;
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}
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switch ($this->driver) {
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case 'pdo':
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$r = $this->p("SELECT 1");
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if ($this->isResult($r)) {
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$row = $this->toArray($r);
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$connected = ($row[0]['1'] == '1');
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}
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break;
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case 'mysqli':
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$connected = $this->connection->ping();
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break;
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}
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return $connected;
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}
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/**
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* @brief Replaces ANY_VALUE() function by MIN() function,
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* if the database server does not support ANY_VALUE().
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*
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* Considerations for Standard SQL, or MySQL with ONLY_FULL_GROUP_BY (default since 5.7.5).
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* ANY_VALUE() is available from MySQL 5.7.5 https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
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* A standard fall-back is to use MIN().
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*
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* @param string $sql An SQL string without the values
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*
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* @return string The input SQL string modified if necessary.
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*/
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public function anyValueFallback($sql)
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{
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$server_info = $this->serverInfo();
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if (version_compare($server_info, '5.7.5', '<') ||
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(stripos($server_info, 'MariaDB') !== false)) {
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$sql = str_ireplace('ANY_VALUE(', 'MIN(', $sql);
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}
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return $sql;
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}
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/**
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* @brief Replaces the ? placeholders with the parameters in the $args array
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*
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* @param string $sql SQL query
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* @param array $args The parameters that are to replace the ? placeholders
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*
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* @return string The replaced SQL query
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*/
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private function replaceParameters($sql, $args)
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{
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$offset = 0;
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foreach ($args AS $param => $value) {
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if (is_int($args[$param]) || is_float($args[$param])) {
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$replace = intval($args[$param]);
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} else {
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$replace = "'" . $this->escape($args[$param]) . "'";
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}
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$pos = strpos($sql, '?', $offset);
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if ($pos !== false) {
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$sql = substr_replace($sql, $replace, $pos, 1);
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}
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$offset = $pos + strlen($replace);
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}
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return $sql;
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}
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/**
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* @brief Executes a prepared statement that returns data
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* @usage Example: $r = p("SELECT * FROM `item` WHERE `guid` = ?", $guid);
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*
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* Please only use it with complicated queries.
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* For all regular queries please use DBA::select or DBA::exists
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*
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* @param string $sql SQL statement
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*
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* @return bool|object statement object or result object
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* @throws \Exception
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*/
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public function p($sql)
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{
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$stamp1 = microtime(true);
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$params = DBA::getParam(func_get_args());
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// Renumber the array keys to be sure that they fit
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$i = 0;
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$args = [];
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foreach ($params AS $param) {
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// Avoid problems with some MySQL servers and boolean values. See issue #3645
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if (is_bool($param)) {
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$param = (int)$param;
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}
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$args[++$i] = $param;
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}
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if (!$this->connected) {
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return false;
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}
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if ((substr_count($sql, '?') != count($args)) && (count($args) > 0)) {
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// Question: Should we continue or stop the query here?
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$this->logger->warning('Query parameters mismatch.', ['query' => $sql, 'args' => $args, 'callstack' => System::callstack()]);
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}
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$sql = DBA::cleanQuery($sql);
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$sql = $this->anyValueFallback($sql);
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$orig_sql = $sql;
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if ($this->configCache->get('system', 'db_callstack') !== null) {
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$sql = "/*" . System::callstack() . " */ " . $sql;
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}
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$this->error = '';
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$this->errorno = 0;
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$this->affected_rows = 0;
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// We have to make some things different if this function is called from "e"
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$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
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if (isset($trace[1])) {
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$called_from = $trace[1];
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} else {
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// We use just something that is defined to avoid warnings
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$called_from = $trace[0];
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}
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// We are having an own error logging in the function "e"
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$called_from_e = ($called_from['function'] == 'e');
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switch ($this->driver) {
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case 'pdo':
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// If there are no arguments we use "query"
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if (count($args) == 0) {
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if (!$retval = $this->connection->query($sql)) {
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$errorInfo = $this->connection->errorInfo();
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$this->error = $errorInfo[2];
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$this->errorno = $errorInfo[1];
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$retval = false;
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break;
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}
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$this->affected_rows = $retval->rowCount();
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break;
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}
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/** @var $stmt mysqli_stmt|PDOStatement */
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if (!$stmt = $this->connection->prepare($sql)) {
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$errorInfo = $this->connection->errorInfo();
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$this->error = $errorInfo[2];
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$this->errorno = $errorInfo[1];
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$retval = false;
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break;
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}
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foreach ($args AS $param => $value) {
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if (is_int($args[$param])) {
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$data_type = PDO::PARAM_INT;
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} else {
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$data_type = PDO::PARAM_STR;
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}
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$stmt->bindParam($param, $args[$param], $data_type);
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}
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if (!$stmt->execute()) {
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$errorInfo = $stmt->errorInfo();
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$this->error = $errorInfo[2];
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$this->errorno = $errorInfo[1];
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$retval = false;
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} else {
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$retval = $stmt;
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$this->affected_rows = $retval->rowCount();
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}
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break;
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case 'mysqli':
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// There are SQL statements that cannot be executed with a prepared statement
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$parts = explode(' ', $orig_sql);
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$command = strtolower($parts[0]);
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$can_be_prepared = in_array($command, ['select', 'update', 'insert', 'delete']);
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// The fallback routine is called as well when there are no arguments
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if (!$can_be_prepared || (count($args) == 0)) {
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$retval = $this->connection->query($this->replaceParameters($sql, $args));
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if ($this->connection->errno) {
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$this->error = $this->connection->error;
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$this->errorno = $this->connection->errno;
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$retval = false;
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} else {
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if (isset($retval->num_rows)) {
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$this->affected_rows = $retval->num_rows;
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} else {
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$this->affected_rows = $this->connection->affected_rows;
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}
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}
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break;
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}
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$stmt = $this->connection->stmt_init();
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if (!$stmt->prepare($sql)) {
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$this->error = $stmt->error;
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$this->errorno = $stmt->errno;
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$retval = false;
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break;
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}
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|
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$param_types = '';
|
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$values = [];
|
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foreach ($args AS $param => $value) {
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if (is_int($args[$param])) {
|
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$param_types .= 'i';
|
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} elseif (is_float($args[$param])) {
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$param_types .= 'd';
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} elseif (is_string($args[$param])) {
|
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$param_types .= 's';
|
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} else {
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$param_types .= 'b';
|
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}
|
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$values[] = &$args[$param];
|
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}
|
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|
|
if (count($values) > 0) {
|
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array_unshift($values, $param_types);
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call_user_func_array([$stmt, 'bind_param'], $values);
|
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}
|
|
|
|
if (!$stmt->execute()) {
|
|
$this->error = $this->connection->error;
|
|
$this->errorno = $this->connection->errno;
|
|
$retval = false;
|
|
} else {
|
|
$stmt->store_result();
|
|
$retval = $stmt;
|
|
$this->affected_rows = $retval->affected_rows;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// We are having an own error logging in the function "e"
|
|
if (($this->errorno != 0) && !$called_from_e) {
|
|
// We have to preserve the error code, somewhere in the logging it get lost
|
|
$error = $this->error;
|
|
$errorno = $this->errorno;
|
|
|
|
$this->logger->error('DB Error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
'callstack' => System::callstack(8),
|
|
'params' => $this->replaceParameters($sql, $args),
|
|
]);
|
|
|
|
// On a lost connection we try to reconnect - but only once.
|
|
if ($errorno == 2006) {
|
|
if ($this->in_retrial || !$this->reconnect()) {
|
|
// It doesn't make sense to continue when the database connection was lost
|
|
if ($this->in_retrial) {
|
|
$this->logger->notice('Giving up retrial because of database error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
]);
|
|
} else {
|
|
$this->logger->notice('Couldn\'t reconnect after database error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
]);
|
|
}
|
|
exit(1);
|
|
} else {
|
|
// We try it again
|
|
$this->logger->notice('Reconnected after database error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
]);
|
|
$this->in_retrial = true;
|
|
$ret = $this->p($sql, $args);
|
|
$this->in_retrial = false;
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
$this->error = $error;
|
|
$this->errorno = $errorno;
|
|
}
|
|
|
|
$this->profiler->saveTimestamp($stamp1, 'database', System::callstack());
|
|
|
|
if ($this->configCache->get('system', 'db_log')) {
|
|
$stamp2 = microtime(true);
|
|
$duration = (float)($stamp2 - $stamp1);
|
|
|
|
if (($duration > $this->configCache->get('system', 'db_loglimit'))) {
|
|
$duration = round($duration, 3);
|
|
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
|
|
|
|
@file_put_contents($this->configCache->get('system', 'db_log'), DateTimeFormat::utcNow() . "\t" . $duration . "\t" .
|
|
basename($backtrace[1]["file"]) . "\t" .
|
|
$backtrace[1]["line"] . "\t" . $backtrace[2]["function"] . "\t" .
|
|
substr($this->replaceParameters($sql, $args), 0, 2000) . "\n", FILE_APPEND);
|
|
}
|
|
}
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Executes a prepared statement like UPDATE or INSERT that doesn't return data
|
|
*
|
|
* Please use DBA::delete, DBA::insert, DBA::update, ... instead
|
|
*
|
|
* @param string $sql SQL statement
|
|
*
|
|
* @return boolean Was the query successfull? False is returned only if an error occurred
|
|
* @throws \Exception
|
|
*/
|
|
public function e($sql)
|
|
{
|
|
|
|
$stamp = microtime(true);
|
|
|
|
$params = DBA::getParam(func_get_args());
|
|
|
|
// In a case of a deadlock we are repeating the query 20 times
|
|
$timeout = 20;
|
|
|
|
do {
|
|
$stmt = $this->p($sql, $params);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} elseif (is_object($stmt)) {
|
|
$retval = true;
|
|
} else {
|
|
$retval = false;
|
|
}
|
|
|
|
$this->close($stmt);
|
|
|
|
} while (($this->errorno == 1213) && (--$timeout > 0));
|
|
|
|
if ($this->errorno != 0) {
|
|
// We have to preserve the error code, somewhere in the logging it get lost
|
|
$error = $this->error;
|
|
$errorno = $this->errorno;
|
|
|
|
$this->logger->error('DB Error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
'callstack' => System::callstack(8),
|
|
'params' => $this->replaceParameters($sql, $params),
|
|
]);
|
|
|
|
// On a lost connection we simply quit.
|
|
// A reconnect like in $this->p could be dangerous with modifications
|
|
if ($errorno == 2006) {
|
|
$this->logger->notice('Giving up because of database error', [
|
|
'code' => $this->errorno,
|
|
'error' => $this->error,
|
|
]);
|
|
exit(1);
|
|
}
|
|
|
|
$this->error = $error;
|
|
$this->errorno = $errorno;
|
|
}
|
|
|
|
$this->profiler->saveTimestamp($stamp, "database_write", System::callstack());
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Check if data exists
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $condition array of fields for condition
|
|
*
|
|
* @return boolean Are there rows for that condition?
|
|
* @throws \Exception
|
|
*/
|
|
public function exists($table, $condition)
|
|
{
|
|
if (empty($table)) {
|
|
return false;
|
|
}
|
|
|
|
$fields = [];
|
|
|
|
if (empty($condition)) {
|
|
return DBStructure::existsTable($table);
|
|
}
|
|
|
|
reset($condition);
|
|
$first_key = key($condition);
|
|
if (!is_int($first_key)) {
|
|
$fields = [$first_key];
|
|
}
|
|
|
|
$stmt = $this->select($table, $fields, $condition, ['limit' => 1]);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} else {
|
|
$retval = ($this->numRows($stmt) > 0);
|
|
}
|
|
|
|
$this->close($stmt);
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* Fetches the first row
|
|
*
|
|
* Please use DBA::selectFirst or DBA::exists whenever this is possible.
|
|
*
|
|
* @brief Fetches the first row
|
|
*
|
|
* @param string $sql SQL statement
|
|
*
|
|
* @return array first row of query
|
|
* @throws \Exception
|
|
*/
|
|
public function fetchFirst($sql)
|
|
{
|
|
$params = DBA::getParam(func_get_args());
|
|
|
|
$stmt = $this->p($sql, $params);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} else {
|
|
$retval = $this->fetch($stmt);
|
|
}
|
|
|
|
$this->close($stmt);
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of affected rows of the last statement
|
|
*
|
|
* @return int Number of rows
|
|
*/
|
|
public function affectedRows()
|
|
{
|
|
return $this->affected_rows;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of columns of a statement
|
|
*
|
|
* @param object Statement object
|
|
*
|
|
* @return int Number of columns
|
|
*/
|
|
public function columnCount($stmt)
|
|
{
|
|
if (!is_object($stmt)) {
|
|
return 0;
|
|
}
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
return $stmt->columnCount();
|
|
case 'mysqli':
|
|
return $stmt->field_count;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of rows of a statement
|
|
*
|
|
* @param PDOStatement|mysqli_result|mysqli_stmt Statement object
|
|
*
|
|
* @return int Number of rows
|
|
*/
|
|
public function numRows($stmt)
|
|
{
|
|
if (!is_object($stmt)) {
|
|
return 0;
|
|
}
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
return $stmt->rowCount();
|
|
case 'mysqli':
|
|
return $stmt->num_rows;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Fetch a single row
|
|
*
|
|
* @param mixed $stmt statement object
|
|
*
|
|
* @return array current row
|
|
*/
|
|
public function fetch($stmt)
|
|
{
|
|
|
|
$stamp1 = microtime(true);
|
|
|
|
$columns = [];
|
|
|
|
if (!is_object($stmt)) {
|
|
return false;
|
|
}
|
|
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
$columns = $stmt->fetch(PDO::FETCH_ASSOC);
|
|
break;
|
|
case 'mysqli':
|
|
if (get_class($stmt) == 'mysqli_result') {
|
|
$columns = $stmt->fetch_assoc();
|
|
break;
|
|
}
|
|
|
|
// This code works, but is slow
|
|
|
|
// Bind the result to a result array
|
|
$cols = [];
|
|
|
|
$cols_num = [];
|
|
for ($x = 0; $x < $stmt->field_count; $x++) {
|
|
$cols[] = &$cols_num[$x];
|
|
}
|
|
|
|
call_user_func_array([$stmt, 'bind_result'], $cols);
|
|
|
|
if (!$stmt->fetch()) {
|
|
return false;
|
|
}
|
|
|
|
// The slow part:
|
|
// We need to get the field names for the array keys
|
|
// It seems that there is no better way to do this.
|
|
$result = $stmt->result_metadata();
|
|
$fields = $result->fetch_fields();
|
|
|
|
foreach ($cols_num AS $param => $col) {
|
|
$columns[$fields[$param]->name] = $col;
|
|
}
|
|
}
|
|
|
|
$this->profiler->saveTimestamp($stamp1, 'database', System::callstack());
|
|
|
|
return $columns;
|
|
}
|
|
|
|
/**
|
|
* @brief Insert a row into a table
|
|
*
|
|
* @param string/array $table Table name
|
|
*
|
|
* @return string formatted and sanitzed table name
|
|
* @throws \Exception
|
|
*/
|
|
public function formatTableName($table)
|
|
{
|
|
if (is_string($table)) {
|
|
return "`" . $this->sanitizeIdentifier($table) . "`";
|
|
}
|
|
|
|
if (!is_array($table)) {
|
|
return '';
|
|
}
|
|
|
|
$scheme = key($table);
|
|
|
|
return "`" . $this->sanitizeIdentifier($scheme) . "`.`" . $this->sanitizeIdentifier($table[$scheme]) . "`";
|
|
}
|
|
|
|
/**
|
|
* @brief Insert a row into a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $param parameter array
|
|
* @param bool $on_duplicate_update Do an update on a duplicate entry
|
|
*
|
|
* @return boolean was the insert successful?
|
|
* @throws \Exception
|
|
*/
|
|
public function insert($table, $param, $on_duplicate_update = false)
|
|
{
|
|
|
|
if (empty($table) || empty($param)) {
|
|
$this->logger->info('Table and fields have to be set');
|
|
return false;
|
|
}
|
|
|
|
$sql = "INSERT INTO " . $this->formatTableName($table) . " (`" . implode("`, `", array_keys($param)) . "`) VALUES (" .
|
|
substr(str_repeat("?, ", count($param)), 0, -2) . ")";
|
|
|
|
if ($on_duplicate_update) {
|
|
$sql .= " ON DUPLICATE KEY UPDATE `" . implode("` = ?, `", array_keys($param)) . "` = ?";
|
|
|
|
$values = array_values($param);
|
|
$param = array_merge_recursive($values, $values);
|
|
}
|
|
|
|
return $this->e($sql, $param);
|
|
}
|
|
|
|
/**
|
|
* @brief Fetch the id of the last insert command
|
|
*
|
|
* @return integer Last inserted id
|
|
*/
|
|
public function lastInsertId()
|
|
{
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
$id = $this->connection->lastInsertId();
|
|
break;
|
|
case 'mysqli':
|
|
$id = $this->connection->insert_id;
|
|
break;
|
|
}
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* @brief Locks a table for exclusive write access
|
|
*
|
|
* This function can be extended in the future to accept a table array as well.
|
|
*
|
|
* @param string $table Table name
|
|
*
|
|
* @return boolean was the lock successful?
|
|
* @throws \Exception
|
|
*/
|
|
public function lock($table)
|
|
{
|
|
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
|
|
if ($this->driver == 'pdo') {
|
|
$this->e("SET autocommit=0");
|
|
$this->connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
|
|
} else {
|
|
$this->connection->autocommit(false);
|
|
}
|
|
|
|
$success = $this->e("LOCK TABLES " . $this->formatTableName($table) . " WRITE");
|
|
|
|
if ($this->driver == 'pdo') {
|
|
$this->connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
|
|
}
|
|
|
|
if (!$success) {
|
|
if ($this->driver == 'pdo') {
|
|
$this->e("SET autocommit=1");
|
|
} else {
|
|
$this->connection->autocommit(true);
|
|
}
|
|
} else {
|
|
$this->in_transaction = true;
|
|
}
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* @brief Unlocks all locked tables
|
|
*
|
|
* @return boolean was the unlock successful?
|
|
* @throws \Exception
|
|
*/
|
|
public function unlock()
|
|
{
|
|
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
|
|
$this->performCommit();
|
|
|
|
if ($this->driver == 'pdo') {
|
|
$this->connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
|
|
}
|
|
|
|
$success = $this->e("UNLOCK TABLES");
|
|
|
|
if ($this->driver == 'pdo') {
|
|
$this->connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
|
|
$this->e("SET autocommit=1");
|
|
} else {
|
|
$this->connection->autocommit(true);
|
|
}
|
|
|
|
$this->in_transaction = false;
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a transaction
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public function transaction()
|
|
{
|
|
if (!$this->performCommit()) {
|
|
return false;
|
|
}
|
|
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
if (!$this->connection->inTransaction() && !$this->connection->beginTransaction()) {
|
|
return false;
|
|
}
|
|
break;
|
|
|
|
case 'mysqli':
|
|
if (!$this->connection->begin_transaction()) {
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
$this->in_transaction = true;
|
|
return true;
|
|
}
|
|
|
|
private function performCommit()
|
|
{
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
if (!$this->connection->inTransaction()) {
|
|
return true;
|
|
}
|
|
|
|
return $this->connection->commit();
|
|
|
|
case 'mysqli':
|
|
return $this->connection->commit();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Does a commit
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public function commit()
|
|
{
|
|
if (!$this->performCommit()) {
|
|
return false;
|
|
}
|
|
$this->in_transaction = false;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Does a rollback
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public function rollback()
|
|
{
|
|
$ret = false;
|
|
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
if (!$this->connection->inTransaction()) {
|
|
$ret = true;
|
|
break;
|
|
}
|
|
$ret = $this->connection->rollBack();
|
|
break;
|
|
|
|
case 'mysqli':
|
|
$ret = $this->connection->rollback();
|
|
break;
|
|
}
|
|
$this->in_transaction = false;
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Build the array with the table relations
|
|
*
|
|
* The array is build from the database definitions in DBStructure.php
|
|
*
|
|
* This process must only be started once, since the value is cached.
|
|
*/
|
|
private function buildRelationData()
|
|
{
|
|
$definition = DBStructure::definition($this->configCache->get('system', 'basepath'));
|
|
|
|
foreach ($definition AS $table => $structure) {
|
|
foreach ($structure['fields'] AS $field => $field_struct) {
|
|
if (isset($field_struct['relation'])) {
|
|
foreach ($field_struct['relation'] AS $rel_table => $rel_field) {
|
|
$this->relation[$rel_table][$rel_field][$table][] = $field;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Delete a row from a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $conditions Field condition(s)
|
|
* @param array $options
|
|
* - cascade: If true we delete records in other tables that depend on the one we're deleting through
|
|
* relations (default: true)
|
|
* @param array $callstack Internal use: prevent endless loops
|
|
*
|
|
* @return boolean was the delete successful?
|
|
* @throws \Exception
|
|
*/
|
|
public function delete($table, array $conditions, array $options = [], array &$callstack = [])
|
|
{
|
|
if (empty($table) || empty($conditions)) {
|
|
$this->logger->info('Table and conditions have to be set');
|
|
return false;
|
|
}
|
|
|
|
$commands = [];
|
|
|
|
// Create a key for the loop prevention
|
|
$key = $table . ':' . json_encode($conditions);
|
|
|
|
// We quit when this key already exists in the callstack.
|
|
if (isset($callstack[$key])) {
|
|
return $commands;
|
|
}
|
|
|
|
$callstack[$key] = true;
|
|
|
|
$table = $this->sanitizeIdentifier($table);
|
|
|
|
$commands[$key] = ['table' => $table, 'conditions' => $conditions];
|
|
|
|
// Don't use "defaults" here, since it would set "false" to "true"
|
|
if (isset($options['cascade'])) {
|
|
$cascade = $options['cascade'];
|
|
} else {
|
|
$cascade = true;
|
|
}
|
|
|
|
// To speed up the whole process we cache the table relations
|
|
if ($cascade && count($this->relation) == 0) {
|
|
$this->buildRelationData();
|
|
}
|
|
|
|
// Is there a relation entry for the table?
|
|
if ($cascade && isset($this->relation[$table])) {
|
|
// We only allow a simple "one field" relation.
|
|
$field = array_keys($this->relation[$table])[0];
|
|
$rel_def = array_values($this->relation[$table])[0];
|
|
|
|
// Create a key for preventing double queries
|
|
$qkey = $field . '-' . $table . ':' . json_encode($conditions);
|
|
|
|
// When the search field is the relation field, we don't need to fetch the rows
|
|
// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
|
|
if ((count($conditions) == 1) && ($field == array_keys($conditions)[0])) {
|
|
foreach ($rel_def AS $rel_table => $rel_fields) {
|
|
foreach ($rel_fields AS $rel_field) {
|
|
$this->delete($rel_table, [$rel_field => array_values($conditions)[0]], $options, $callstack);
|
|
}
|
|
}
|
|
// We quit when this key already exists in the callstack.
|
|
} elseif (!isset($callstack[$qkey])) {
|
|
$callstack[$qkey] = true;
|
|
|
|
// Fetch all rows that are to be deleted
|
|
$data = $this->select($table, [$field], $conditions);
|
|
|
|
while ($row = $this->fetch($data)) {
|
|
$this->delete($table, [$field => $row[$field]], $options, $callstack);
|
|
}
|
|
|
|
$this->close($data);
|
|
|
|
// Since we had split the delete command we don't need the original command anymore
|
|
unset($commands[$key]);
|
|
}
|
|
}
|
|
|
|
// Now we finalize the process
|
|
$do_transaction = !$this->in_transaction;
|
|
|
|
if ($do_transaction) {
|
|
$this->transaction();
|
|
}
|
|
|
|
$compacted = [];
|
|
$counter = [];
|
|
|
|
foreach ($commands AS $command) {
|
|
$conditions = $command['conditions'];
|
|
reset($conditions);
|
|
$first_key = key($conditions);
|
|
|
|
$condition_string = DBA::buildCondition($conditions);
|
|
|
|
if ((count($command['conditions']) > 1) || is_int($first_key)) {
|
|
$sql = "DELETE FROM `" . $command['table'] . "`" . $condition_string;
|
|
$this->logger->debug($this->replaceParameters($sql, $conditions));
|
|
|
|
if (!$this->e($sql, $conditions)) {
|
|
if ($do_transaction) {
|
|
$this->rollback();
|
|
}
|
|
return false;
|
|
}
|
|
} else {
|
|
$key_table = $command['table'];
|
|
$key_condition = array_keys($command['conditions'])[0];
|
|
$value = array_values($command['conditions'])[0];
|
|
|
|
// Split the SQL queries in chunks of 100 values
|
|
// We do the $i stuff here to make the code better readable
|
|
$i = isset($counter[$key_table][$key_condition]) ? $counter[$key_table][$key_condition] : 0;
|
|
if (isset($compacted[$key_table][$key_condition][$i]) && count($compacted[$key_table][$key_condition][$i]) > 100) {
|
|
++$i;
|
|
}
|
|
|
|
$compacted[$key_table][$key_condition][$i][$value] = $value;
|
|
$counter[$key_table][$key_condition] = $i;
|
|
}
|
|
}
|
|
foreach ($compacted AS $table => $values) {
|
|
foreach ($values AS $field => $field_value_list) {
|
|
foreach ($field_value_list AS $field_values) {
|
|
$sql = "DELETE FROM `" . $table . "` WHERE `" . $field . "` IN (" .
|
|
substr(str_repeat("?, ", count($field_values)), 0, -2) . ");";
|
|
|
|
$this->logger->debug($this->replaceParameters($sql, $field_values));
|
|
|
|
if (!$this->e($sql, $field_values)) {
|
|
if ($do_transaction) {
|
|
$this->rollback();
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ($do_transaction) {
|
|
$this->commit();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Updates rows
|
|
*
|
|
* Updates rows in the database. When $old_fields is set to an array,
|
|
* the system will only do an update if the fields in that array changed.
|
|
*
|
|
* Attention:
|
|
* Only the values in $old_fields are compared.
|
|
* This is an intentional behaviour.
|
|
*
|
|
* Example:
|
|
* We include the timestamp field in $fields but not in $old_fields.
|
|
* Then the row will only get the new timestamp when the other fields had changed.
|
|
*
|
|
* When $old_fields is set to a boolean value the system will do this compare itself.
|
|
* When $old_fields is set to "true" the system will do an insert if the row doesn't exists.
|
|
*
|
|
* Attention:
|
|
* Only set $old_fields to a boolean value when you are sure that you will update a single row.
|
|
* When you set $old_fields to "true" then $fields must contain all relevant fields!
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $fields contains the fields that are updated
|
|
* @param array $condition condition array with the key values
|
|
* @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate)
|
|
*
|
|
* @return boolean was the update successfull?
|
|
* @throws \Exception
|
|
*/
|
|
public function update($table, $fields, $condition, $old_fields = [])
|
|
{
|
|
|
|
if (empty($table) || empty($fields) || empty($condition)) {
|
|
$this->logger->info('Table, fields and condition have to be set');
|
|
return false;
|
|
}
|
|
|
|
$condition_string = DBA::buildCondition($condition);
|
|
|
|
if (is_bool($old_fields)) {
|
|
$do_insert = $old_fields;
|
|
|
|
$old_fields = $this->selectFirst($table, [], $condition);
|
|
|
|
if (is_bool($old_fields)) {
|
|
if ($do_insert) {
|
|
$values = array_merge($condition, $fields);
|
|
return $this->insert($table, $values, $do_insert);
|
|
}
|
|
$old_fields = [];
|
|
}
|
|
}
|
|
|
|
$do_update = (count($old_fields) == 0);
|
|
|
|
foreach ($old_fields AS $fieldname => $content) {
|
|
if (isset($fields[$fieldname])) {
|
|
if (($fields[$fieldname] == $content) && !is_null($content)) {
|
|
unset($fields[$fieldname]);
|
|
} else {
|
|
$do_update = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$do_update || (count($fields) == 0)) {
|
|
return true;
|
|
}
|
|
|
|
$sql = "UPDATE " . $this->formatTableName($table) . " SET `" .
|
|
implode("` = ?, `", array_keys($fields)) . "` = ?" . $condition_string;
|
|
|
|
$params1 = array_values($fields);
|
|
$params2 = array_values($condition);
|
|
$params = array_merge_recursive($params1, $params2);
|
|
|
|
return $this->e($sql, $params);
|
|
}
|
|
|
|
/**
|
|
* Retrieve a single record from a table and returns it in an associative array
|
|
*
|
|
* @brief Retrieve a single record from a table
|
|
*
|
|
* @param string $table
|
|
* @param array $fields
|
|
* @param array $condition
|
|
* @param array $params
|
|
*
|
|
* @return bool|array
|
|
* @throws \Exception
|
|
* @see $this->select
|
|
*/
|
|
public function selectFirst($table, array $fields = [], array $condition = [], $params = [])
|
|
{
|
|
$params['limit'] = 1;
|
|
$result = $this->select($table, $fields, $condition, $params);
|
|
|
|
if (is_bool($result)) {
|
|
return $result;
|
|
} else {
|
|
$row = $this->fetch($result);
|
|
$this->close($result);
|
|
return $row;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Select rows from a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $fields Array of selected fields, empty for all
|
|
* @param array $condition Array of fields for condition
|
|
* @param array $params Array of several parameters
|
|
*
|
|
* @return boolean|object
|
|
*
|
|
* Example:
|
|
* $table = "item";
|
|
* $fields = array("id", "uri", "uid", "network");
|
|
*
|
|
* $condition = array("uid" => 1, "network" => 'dspr');
|
|
* or:
|
|
* $condition = array("`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr');
|
|
*
|
|
* $params = array("order" => array("id", "received" => true), "limit" => 10);
|
|
*
|
|
* $data = DBA::select($table, $fields, $condition, $params);
|
|
* @throws \Exception
|
|
*/
|
|
public function select($table, array $fields = [], array $condition = [], array $params = [])
|
|
{
|
|
if (empty($table)) {
|
|
return false;
|
|
}
|
|
|
|
if (count($fields) > 0) {
|
|
$select_fields = "`" . implode("`, `", array_values($fields)) . "`";
|
|
} else {
|
|
$select_fields = "*";
|
|
}
|
|
|
|
$condition_string = DBA::buildCondition($condition);
|
|
|
|
$param_string = DBA::buildParameter($params);
|
|
|
|
$sql = "SELECT " . $select_fields . " FROM " . $this->formatTableName($table) . $condition_string . $param_string;
|
|
|
|
$result = $this->p($sql, $condition);
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief Counts the rows from a table satisfying the provided condition
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $condition array of fields for condition
|
|
*
|
|
* @return int
|
|
*
|
|
* Example:
|
|
* $table = "item";
|
|
*
|
|
* $condition = ["uid" => 1, "network" => 'dspr'];
|
|
* or:
|
|
* $condition = ["`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr'];
|
|
*
|
|
* $count = DBA::count($table, $condition);
|
|
* @throws \Exception
|
|
*/
|
|
public function count($table, array $condition = [])
|
|
{
|
|
if (empty($table)) {
|
|
return false;
|
|
}
|
|
|
|
$condition_string = DBA::buildCondition($condition);
|
|
|
|
$sql = "SELECT COUNT(*) AS `count` FROM " . $this->formatTableName($table) . $condition_string;
|
|
|
|
$row = $this->fetchFirst($sql, $condition);
|
|
|
|
return $row['count'];
|
|
}
|
|
|
|
/**
|
|
* @brief Fills an array with data from a query
|
|
*
|
|
* @param object $stmt statement object
|
|
* @param bool $do_close
|
|
*
|
|
* @return array Data array
|
|
*/
|
|
public function toArray($stmt, $do_close = true)
|
|
{
|
|
if (is_bool($stmt)) {
|
|
return $stmt;
|
|
}
|
|
|
|
$data = [];
|
|
while ($row = $this->fetch($stmt)) {
|
|
$data[] = $row;
|
|
}
|
|
if ($do_close) {
|
|
$this->close($stmt);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the error number of the last query
|
|
*
|
|
* @return string Error number (0 if no error)
|
|
*/
|
|
public function errorNo()
|
|
{
|
|
return $this->errorno;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the error message of the last query
|
|
*
|
|
* @return string Error message ('' if no error)
|
|
*/
|
|
public function errorMessage()
|
|
{
|
|
return $this->error;
|
|
}
|
|
|
|
/**
|
|
* @brief Closes the current statement
|
|
*
|
|
* @param object $stmt statement object
|
|
*
|
|
* @return boolean was the close successful?
|
|
*/
|
|
public function close($stmt)
|
|
{
|
|
|
|
$stamp1 = microtime(true);
|
|
|
|
if (!is_object($stmt)) {
|
|
return false;
|
|
}
|
|
|
|
switch ($this->driver) {
|
|
case 'pdo':
|
|
$ret = $stmt->closeCursor();
|
|
break;
|
|
case 'mysqli':
|
|
// MySQLi offers both a mysqli_stmt and a mysqli_result class.
|
|
// We should be careful not to assume the object type of $stmt
|
|
// because DBA::p() has been able to return both types.
|
|
if ($stmt instanceof mysqli_stmt) {
|
|
$stmt->free_result();
|
|
$ret = $stmt->close();
|
|
} elseif ($stmt instanceof mysqli_result) {
|
|
$stmt->free();
|
|
$ret = true;
|
|
} else {
|
|
$ret = false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
$this->profiler->saveTimestamp($stamp1, 'database', System::callstack());
|
|
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Return a list of database processes
|
|
*
|
|
* @return array
|
|
* 'list' => List of processes, separated in their different states
|
|
* 'amount' => Number of concurrent database processes
|
|
* @throws \Exception
|
|
*/
|
|
public function processlist()
|
|
{
|
|
$ret = $this->p("SHOW PROCESSLIST");
|
|
$data = $this->toArray($ret);
|
|
|
|
$processes = 0;
|
|
$states = [];
|
|
foreach ($data as $process) {
|
|
$state = trim($process["State"]);
|
|
|
|
// Filter out all non blocking processes
|
|
if (!in_array($state, ["", "init", "statistics", "updating"])) {
|
|
++$states[$state];
|
|
++$processes;
|
|
}
|
|
}
|
|
|
|
$statelist = "";
|
|
foreach ($states as $state => $usage) {
|
|
if ($statelist != "") {
|
|
$statelist .= ", ";
|
|
}
|
|
$statelist .= $state . ": " . $usage;
|
|
}
|
|
return (["list" => $statelist, "amount" => $processes]);
|
|
}
|
|
|
|
/**
|
|
* Checks if $array is a filled array with at least one entry.
|
|
*
|
|
* @param mixed $array A filled array with at least one entry
|
|
*
|
|
* @return boolean Whether $array is a filled array or an object with rows
|
|
*/
|
|
public function isResult($array)
|
|
{
|
|
// It could be a return value from an update statement
|
|
if (is_bool($array)) {
|
|
return $array;
|
|
}
|
|
|
|
if (is_object($array)) {
|
|
return $this->numRows($array) > 0;
|
|
}
|
|
|
|
return (is_array($array) && (count($array) > 0));
|
|
}
|
|
|
|
/**
|
|
* @brief Callback function for "esc_array"
|
|
*
|
|
* @param mixed $value Array value
|
|
* @param string $key Array key
|
|
* @param boolean $add_quotation add quotation marks for string values
|
|
*
|
|
* @return void
|
|
*/
|
|
private function escapeArrayCallback(&$value, $key, $add_quotation)
|
|
{
|
|
if (!$add_quotation) {
|
|
if (is_bool($value)) {
|
|
$value = ($value ? '1' : '0');
|
|
} else {
|
|
$value = $this->escape($value);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (is_bool($value)) {
|
|
$value = ($value ? 'true' : 'false');
|
|
} elseif (is_float($value) || is_integer($value)) {
|
|
$value = (string)$value;
|
|
} else {
|
|
$value = "'" . $this->escape($value) . "'";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Escapes a whole array
|
|
*
|
|
* @param mixed $arr Array with values to be escaped
|
|
* @param boolean $add_quotation add quotation marks for string values
|
|
*
|
|
* @return void
|
|
*/
|
|
public function escapeArray(&$arr, $add_quotation = false)
|
|
{
|
|
array_walk($arr, [$this, 'escapeArrayCallback'], $add_quotation);
|
|
}
|
|
}
|