mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
7d13ba7fb8
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@50107 467b73ca-7a2a-4603-9d3b-597d59a354a9
723 lines
22 KiB
PHP
723 lines
22 KiB
PHP
<?php
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/**
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* @package sapphire
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* @subpackage model
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*/
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/**
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* PDO (general database) connector class.
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* @package sapphire
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* @subpackage model
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*/
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class PDODatabase extends Database {
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/**
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* Connection to the DBMS.
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* @var resource
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*/
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private $dbConn;
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/**
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* True if we are connected to a database.
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* @var boolean
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*/
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private $active;
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/**
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* The name of the database.
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* @var string
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*/
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private $database;
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/**
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* Last PDO statement, needed for affectedRows()
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* @var PDO object
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*/
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private $stmt;
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/**
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* Parameters used for creating a connection
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* @var array
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*/
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private $param;
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/**
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* Connect to a database (MySQL, PostgreSQL, or MS SQL).
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* @param parameters An map of parameters, which should include:
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* <ul><li>database: The database to connect with</li>
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* <li>server: The server, eg, localhost</li>
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* <li>port: The port on which the server is listening (optional)</li>
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* <li>instance: Instance of the server, MS SQL only (optional)</li>
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* <li>username: The username to log on with</li>
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* <li>password: The password to log on with</li>
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* <li>database: The database to connect to</li></ul>
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*/
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public function __construct($parameters) {
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$this->param = $parameters;
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$connect = self::getConnect($parameters);
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$connectWithDB = $connect . ';dbname=' . $parameters['database'];
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try { // Try connect to the database, if it does not exist, create it
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$this->dbConn = new PDO($connectWithDB, $parameters['username'], $parameters['password']);
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} catch (PDOException $e) {
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// To do - this is an instance method, not a static method. Call it as such.
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if (!self::createDatabase($connect, $parameters['username'], $parameters['password'], $parameters['database'])) {
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$this->databaseError("Could not connect to the database, make sure the server is available and user credentials are correct");
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} else {
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$this->dbConn = new PDO($connectWithDB, $parameters['username'], $parameters['password']); // After creating the database, connect to it
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}
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}
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parent::__construct();
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}
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/**
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* Build the connection string from input.
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* @param array $parameters The connection details.
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* @return string $connect The connection string.
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**/
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public function getConnect($parameters) {
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switch ($parameters['type']) {
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case "mysql":
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$port = '3306';
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$type = 'mysql';
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$instance = '';
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break;
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case "postgresql":
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$port = '5432';
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$type = 'pgsql';
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$instance = '';
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break;
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case "mssql":
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$port = '1433';
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if (isset($parameters['instance']) && $parameters['instance'] != '') {
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$instance = '\\' . $parameters['instance'];
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} else {
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$instance = '';
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}
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$type = 'mssql';
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break;
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default:
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$this->databaseError("This database server is not available");
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}
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if (isset($parameters['port']) && is_numeric($parameters['port'])) {
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$port = $parameters['port'];
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}
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$connect = $type . ':host=' . $parameters['server'] . $instance . ';port=' . $port;
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return $connect;
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}
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/**
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* Returns true if this database supports collations
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*/
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public function supportsCollations() {
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$collations = false;
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switch (self::getDatabaseServer()) {
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case "pgsql": // Generally supported in PostgreSQL (supported versions), but handled differently than in MySQL, so do not set
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case "mssql": // Generally supported in MS SQL (supported versions), but handled differently than in MySQL, so do not set
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$collations = false;
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break;
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case "mysql":
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if (self::getVersion() >= 4.1) { // Supported in MySQL since 4.1
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$collations = true;
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}
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break;
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}
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return $collations;
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}
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/**
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* Get the database version.
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* @return float
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*/
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public function getVersion() {
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switch (self::getDatabaseServer()) {
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case "mysql":
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case "pgsql":
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$query = "SELECT VERSION()";
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break;
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case "mssql":
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$query = "SELECT @@VERSION";
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break;
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}
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$stmt = $this->dbConn->prepare($query);
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$stmt->execute();
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$dbVersion = $stmt->fetchColumn();
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$version = ereg_replace("([A-Za-z-])", "", $dbVersion);
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return substr(trim($version), 0, 3); // Just get the major and minor version
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}
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/**
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* Get the database server, namely mysql, pgsql, or mssql.
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* @return string
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*/
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public function getDatabaseServer() {
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return $this->dbConn->getAttribute(PDO::ATTR_DRIVER_NAME);
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}
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/**
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* Query the database.
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* @var string $sql The query to be issued to the database.
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* @return result Return the result of the quers (if any).
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*/
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public function query($sql, $errorLevel = E_USER_ERROR) {
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if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,6)), array('insert','update'))) {
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Debug::message("Will execute: $sql");
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return;
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}
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//Debug::backtrace();
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if(isset($_REQUEST['showqueries'])) {
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Debug::message("\n" . $sql . "\n");
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$starttime = microtime(true);
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}
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$stmt = $dbConn->prepare($sql);
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$stmt = $this->dbConn->prepare($sql);
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$handle = $stmt->execute(); // Execute and save the return value (true or false)
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if(isset($_REQUEST['showqueries'])) {
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$duration = microtime(true) - $starttime;
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Debug::message("\n" . $duration . "\n");
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}
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if(!$handle && $errorLevel) {
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$error = $stmt->errorInfo();
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$this->databaseError("Couldn't run query: $sql | " . $error[2], $errorLevel);
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}
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return new PDOQuery($this, $stmt);
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}
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/**
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* Get the ID for the next new record for the table.
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* Get the autogenerated ID from the previous INSERT query.
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* Simulate mysql_insert_id by fetching the highest ID as there is no other reliable method across databases.
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* @return int
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*/
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public function getGeneratedID($table) {
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$stmt = $this->dbConn->prepare("SELECT MAX(ID) FROM $table");
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$handle = $stmt->execute();
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$result = $stmt->fetchColumn();
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return $handle ? $result : 0;
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}
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/**
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* OBSOLETE: Get the ID for the next new record for the table.
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* @var string $table The name od the table.
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* @return int
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*/
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public function getNextID($table) {
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user_error('getNextID is OBSOLETE (and will no longer work properly)', E_USER_WARNING);
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$stmt = $this->dbConn->prepare("SELECT MAX(ID)+1 FROM $table");
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$handle = $stmt->execute();
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$result = $stmt->fetchColumn();
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return $handle ? $result : 1;
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}
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/**
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* Determine if the the table is active.
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* @return bool
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*/
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public function isActive() {
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return $this->active ? true : false;
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}
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/**
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* Create the database and connect to it. This can be called if the
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* initial database connection is not successful because the database
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* does not exist.
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* @param string $connect Connection string
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* @param string $username Database username
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* @param string $password Database Password
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* @param string $database Database to which to create
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* @return boolean Returns true if successful
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* @todo This shouldn't take any arguments; it should take the information given in the constructor instead.
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*/
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public function createDatabase($connect, $username, $password, $database) {
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try {
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$dbh = new PDO($connect, $username, $password);
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$stmt = $dbh->prepare("CREATE DATABASE $database");
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$stmt->execute();
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$this->active = true;
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} catch (PDOException $e) {
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$this->databaseError($e->getMessage());
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return false;
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}
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return true;
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}
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/**
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* Returns true if the named database exists.
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*/
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public function databaseExists($name) {
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$SQL_name = Convert::raw2sql($name);
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$connect = self::getConnect($this->param);
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$connectWithDB = $connect . ';dbname=' . $SQL_name;
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try { // Try connect to the database
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$testConn = new PDO($connectWithDB, $this->param['username'], $this->param['password']);
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} catch (PDOException $e) {
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return false;
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}
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return true;
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}
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/**
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* Switches to the given database.
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* Simply switching database in PDO is not possible, you need to create a new PDO object
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*/
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public function selectDatabase($dbname) {
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$this->dbConn = null; // Remove the old connection
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$connect = self::getConnect($param);
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$connectWithDB = $connect . ';dbname=' . $dbname;
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try { // Try connect to the database, if it does not exist, create it
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$this->dbConn = new PDO($connectWithDB, $param['username'], $param['password']);
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} catch (PDOException $e) {
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if (!self::createDatabase($connect, $param['username'], $param['password'], $dbname)) {
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$this->databaseError("Could not connect to the database, make sure the server is available and user credentials are correct");
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} else {
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$this->dbConn = new PDO($connectWithDB, $param['username'], $param['password']); // After creating the database, connect to it
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}
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}
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}
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/**
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* Create a new table with an integer primary key called ID.
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* @var string $tableName The name of the table.
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* @return void.
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*/
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public function createTable($tableName, $fields = null, $indexes = null) {
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$fieldSchemas = $indexSchemas = "";
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if ($fields) {
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foreach($fields as $k => $v) $fieldSchemas .= "`$k` $v,\n";
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}
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switch (self::getDatabaseServer()) {
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case "mysql":
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$stmt = $this->dbConn->prepare("CREATE TABLE $tableName (ID INT(11) NOT NULL AUTO_INCREMENT, $fieldSchemas PRIMARY KEY (ID)) TYPE=MyISAM");
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break;
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case "pgsql":
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$stmt = $this->dbConn->prepare("CREATE TABLE $tableName (ID SERIAL, $fieldSchemas PRIMARY KEY (ID))");
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break;
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case "mssql":
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$stmt = $this->dbConn->prepare("CREATE TABLE $tableName (ID INT(11) IDENTITY(1,1), $fieldSchemas PRIMARY KEY (ID))");
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break;
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default:
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$this->databaseError("This database server is not available");
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}
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$stmt->execute();
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if ($indexes) {
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self::alterTable($tableName, null, $indexes, null, null);
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}
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}
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/**
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* Alter fields and indexes in existing table.
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* @param string $tableName The name of the table.
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* @param string $newFields Fields to add.
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* @param string $newIndexes Indexes to add.
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* @param string $alteredFields Fields to change.
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* @param string $alteredIndexes Indexes to change.
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* @return void.
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*/
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public function alterTable($table, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null) {
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if ($newFields) {
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foreach ($newFields as $field => $type) {
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$stmt = $this->dbConn->prepare("ALTER TABLE $table ADD $field $type");
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$stmt->execute();
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}
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}
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if ($newIndexes) {
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foreach ($newIndexes as $name => $column) {
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$stmt = $this->dbConn->prepare("CREATE INDEX $name ON $table $column");
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$stmt->execute();
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}
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}
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if ($alteredFields) {
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foreach ($alteredFields as $field => $type) {
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self::alterField($table, $field, $type);
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}
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}
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if ($alteredIndexes) {
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foreach ($newIndexes as $name => $column) {
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$this->dbConn->query("DROP INDEX $name");
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$stmt = $this->dbConn->prepare("CREATE INDEX $name ON $table $column");
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$stmt->execute();
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}
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}
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}
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/**
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* Rename an existing table, the TO is necessary for PostgreSQL and MS SQL.
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* @param string $oldTableName The name of the existing table.
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* @param string $newTableName How the table should be named from now on.
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* @return void.
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*/
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public function renameTable($oldTableName, $newTableName) {
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$stmt = $this->dbConn->prepare("ALTER TABLE $oldTableName RENAME TO $newTableName");
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$stmt->execute();
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}
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/**
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* Checks a table's integrity and repairs it if necessary - only available in MySQL, not supported in PostgreSQL and MS SQL.
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* @var string $tableName The name of the table.
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* @return boolean Return true if the table has integrity after the method is complete.
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*/
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public function checkAndRepairTable($tableName) {
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if ($parameters['type'] == "mysql") {
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if (!$this->runTableCheckCommand("CHECK TABLE `$tableName`")) {
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if(!Database::$supressOutput) {
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echo "<li style=\"color: orange\">Table $tableName: repaired</li>";
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}
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return $this->runTableCheckCommand("REPAIR TABLE `$tableName` USE_FRM");
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} else {
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return true;
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}
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} else {
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$this->databaseError("Checking and repairing of tables is only supported in MySQL, for other databases please do manual checks");
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return false;
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}
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}
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/**
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* Helper function used by checkAndRepairTable.
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* @param string $sql Query to run.
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* @return boolean Returns if the query returns a successful result.
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*/
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protected function runTableCheckCommand($sql) {
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foreach($this->dbConn->query($sql) as $testRecord) {
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if(strtolower($testRecord['Msg_text']) != 'ok') {
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return false;
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}
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}
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return true;
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}
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/**
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* Add the given field to the given table.
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* @param string $tableName The name of the table on which to create the field.
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* @param string $fieldName The field to create.
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* @param string $fieldSpec The datatype of the field.
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* @return void
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*/
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public function createField($tableName, $fieldName, $fieldSpec) {
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$stmt = $this->dbConn->prepare("ALTER TABLE $tableName ADD $fieldName $fieldSpec");
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$stmt->execute();
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}
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/**
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* Change the database type of the given field.
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* @param string $table The table where to change the field.
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* @param string $field The field to change.
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* @param string $type The new type of the field
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* @return void
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*/
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public function alterField($table, $field, $type) {
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switch (self::getDatabaseServer()) {
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case "mysql":
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$stmt = $this->dbConn->prepare("ALTER TABLE $table CHANGE $field $field $type");
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break;
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case "pgsql":
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$stmt = $this->dbConn->prepare("
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BEGIN;
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ALTER TABLE $table RENAME $field TO oldfield;
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ALTER TABLE $table ADD COLUMN $field $type;
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UPDATE $table SET $field = CAST(oldfield AS $type);
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ALTER TABLE $table DROP COLUMN oldfield;
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COMMIT;
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");
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break;
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case "mssql":
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$stmt = $this->dbConn->prepare("ALTER TABLE $table ALTER COLUMN $field $type");
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break;
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default:
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$this->databaseError("This database server is not available");
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}
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$stmt->execute();
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}
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/**
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* Create an index on a table.
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* @param string $tableName The name of the table.
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* @param string $indexName The name of the index.
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* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
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* @return void
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*/
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public function createIndex($tableName, $indexName, $indexSpec) {
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$stmt = $this->dbConn->prepare("CREATE INDEX $indexName ON $tableName $indexSpec");
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$stmt->execute();
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}
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/**
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* Alter an index on a table.
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* @param string $tableName The name of the table.
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* @param string $indexName The name of the index.
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* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
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* @return void
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*/
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public function alterIndex($tableName, $indexName, $indexSpec) {
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$this->dbConn->query("DROP INDEX $indexName");
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$stmt = $this->dbConn->prepare("CREATE INDEX $indexName ON $tableName $indexSpec");
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$stmt->execute();
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}
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/**
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* Get a list of all the fields for the given table.
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* The results are not totally equal for all databases (for example collations are handled very differently, PostgreSQL disregards zerofill,...)
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* but as close as possible and necessary.
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* @param string $able Table of which to show the fields.
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* Returns a map of field name => field spec.
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*/
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public function fieldList($table) {
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switch (self::getDatabaseServer()) {
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case "mysql":
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foreach ($this->dbConn->query("SHOW FULL FIELDS IN $table") as $field) {
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$fieldSpec = $field['Type'];
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if(!$field['Null'] || $field['Null'] == 'NO') {
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$fieldSpec .= ' not null';
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}
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if($field['Collation'] && $field['Collation'] != 'NULL') {
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$values = $this->dbConn->prepare("SHOW COLLATION LIKE '$field[Collation]'");
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$values->execute();
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$collInfo = $values->fetchColumn();
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$fieldSpec .= " character set $collInfo[Charset] collate $field[Collation]";
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}
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if($field['Default'] || $field['Default'] === "0") {
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$fieldSpec .= " default '" . addslashes($field['Default']) . "'";
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}
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if($field['Extra']) $fieldSpec .= " $field[Extra]";
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$fieldList[$field['Field']] = $fieldSpec;
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}
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break;
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case "pgsql":
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foreach ($this->dbConn->query("
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SELECT
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column_name AS cname,
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column_default AS cdefault,
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is_nullable AS nullable,
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data_type AS dtype,
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character_maximum_length AS maxlength
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FROM
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information_schema.columns
|
|
WHERE
|
|
table_name = $table
|
|
") as $field) {
|
|
if ($field['maxlength']) {
|
|
$fieldSpec = $field['dtype'] . "(" . $field['maxlength'] . ")";
|
|
} else {
|
|
$fieldSpec = $field['dtype'];
|
|
}
|
|
if ($field['nullable'] == 'NO') {
|
|
$fieldSpec .= ' not null';
|
|
}
|
|
if($field['cdefault'] || $field['cdefault'] === "0") {
|
|
$fieldSpec .= " default '" . addslashes($field['cdefault']) . "'";
|
|
}
|
|
$fieldList[$field['cname']] = $fieldSpec;
|
|
}
|
|
break;
|
|
case "mssql":
|
|
foreach ($this->dbConn->query("
|
|
SELECT
|
|
COLUMN_NAME AS 'cname',
|
|
COLUMN_DEFAULT AS 'cdefault',
|
|
IS_NULLABLE AS 'nullable',
|
|
DATA_TYPE AS 'dtype',
|
|
COLLATION_NAME AS 'collname',
|
|
CHARACTER_SET_NAME AS 'cset',
|
|
CHARACTER_MAXIMUM_LENGTH AS 'maxlength'
|
|
FROM
|
|
information_schema.columns
|
|
WHERE
|
|
TABLE_NAME = '$table'
|
|
") as $field) {
|
|
if ($field['maxlength']) {
|
|
$fieldSpec = $field['dtype'] . "(" . $field['maxlength'] . ")";
|
|
} else {
|
|
$fieldSpec = $field['dtype'];
|
|
}
|
|
if ($field['nullable'] == 'NO') {
|
|
$fieldSpec .= ' not null';
|
|
}
|
|
|
|
if($field['collname'] && $field['collname'] != 'NULL') {
|
|
$fieldSpec .= " character set $field[cset] collate $field[collname]";
|
|
}
|
|
|
|
if($field['cdefault'] || $field['cdefault'] === "0") {
|
|
$fieldSpec .= " default '" . addslashes($field['cdefault']) . "'";
|
|
}
|
|
|
|
$fieldList[$field['cname']] = $fieldSpec;
|
|
}
|
|
break;
|
|
default:
|
|
$this->databaseError("This database server is not available");
|
|
}
|
|
|
|
return $fieldList;
|
|
}
|
|
|
|
/**
|
|
* Get a list of all the indexes for the given table.
|
|
* @param string $able Table of which to show the indexes.
|
|
* Returns a map of indexes.
|
|
*/
|
|
public function indexList($table) {
|
|
switch (self::getDatabaseServer()) {
|
|
case "mysql":
|
|
foreach($this->dbConn->query("SHOW INDEXES IN '$table'") as $index) {
|
|
$groupedIndexes[$index['Key_name']]['fields'][$index['Seq_in_index']] = $index['Column_name'];
|
|
if($index['Index_type'] == 'FULLTEXT') {
|
|
$groupedIndexes[$index['Key_name']]['type'] = 'fulltext ';
|
|
} else if(!$index['Non_unique']) {
|
|
$groupedIndexes[$index['Key_name']]['type'] = 'unique ';
|
|
} else {
|
|
$groupedIndexes[$index['Key_name']]['type'] = '';
|
|
}
|
|
}
|
|
foreach($groupedIndexes as $index => $details) {
|
|
ksort($details['fields']);
|
|
$indexList[$index] = $details['type'] . '(' . implode(',',$details['fields']) . ')';
|
|
}
|
|
break;
|
|
case "pgsql":
|
|
foreach($this->dbConn->query("SELECT indexname, indexdef FROM pg_indexes WHERE tablename = '$table'") as $index) {
|
|
$indexList[$index['indexname']] = $index['indexdef'];
|
|
}
|
|
break;
|
|
case "mssql":
|
|
foreach($this->dbConn->query("
|
|
SELECT
|
|
i.name AS 'iname',
|
|
i.type_desc AS 'itype',
|
|
s.name AS 'sname'
|
|
FROM
|
|
sys.indexes i,
|
|
sys.objects o,
|
|
sys.index_columns c,
|
|
sys.columns s
|
|
WHERE
|
|
o.name = '$table'
|
|
AND o.object_id = i.object_id
|
|
AND o.object_id = c.object_id
|
|
AND o.object_id = s.object_id
|
|
AND s.column_id = c.column_id
|
|
") as $index) {
|
|
$indexList[$index['iname']] = $index['itype'] . " (" . $index['sname'] . ")";
|
|
}
|
|
break;
|
|
default:
|
|
$this->databaseError("This database server is not available");
|
|
}
|
|
|
|
return $indexList;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of all the tables in the database.
|
|
* Table names will all be in lowercase.
|
|
* Returns a map of a table.
|
|
*/
|
|
public function tableList() {
|
|
switch (self::getDatabaseServer()) {
|
|
case "mysql":
|
|
$sql = "SHOW TABLES";
|
|
break;
|
|
case "pgsql":
|
|
$sql = "SELECT tablename FROM pg_tables WHERE tablename NOT ILIKE 'pg_%' AND tablename NOT ILIKE 'sql_%'";
|
|
break;
|
|
case "mssql":
|
|
$sql = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_NAME NOT LIKE 'sysdiagrams%'";
|
|
break;
|
|
default:
|
|
$this->databaseError("This database server is not available");
|
|
}
|
|
if (is_array($this->dbConn->query($sql))) {
|
|
foreach($this->dbConn->query($sql) as $record) {
|
|
$table = strtolower(reset($record));
|
|
$tables[$table] = $table;
|
|
}
|
|
}
|
|
return isset($tables) ? $tables : null;
|
|
}
|
|
|
|
/**
|
|
* Return the number of rows affected (DELETE, INSERT, or UPDATE) by the previous operation.
|
|
*/
|
|
public function affectedRows() {
|
|
return $stmt->rowCount();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a database query (array).
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class PDOQuery extends Query {
|
|
private $database;
|
|
private $handle;
|
|
|
|
/**
|
|
* The object that holds the result set.
|
|
* @var $stmt
|
|
*/
|
|
private $stmt;
|
|
|
|
/**
|
|
* Hook the result-set given into a Query class, suitable for use by sapphire.
|
|
* @param PDO object $stmt The object of all returned values.
|
|
*/
|
|
public function __construct(PDODatabase $database, $stmt) {
|
|
$this->database = $database;
|
|
$this->stmt = $stmt;
|
|
parent::__construct();
|
|
}
|
|
|
|
|
|
/**
|
|
* Free the result-set given into a Query class.
|
|
*/
|
|
public function __destroy() {
|
|
$this->stmt = null;
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if a given element is part of the result set.
|
|
* @param string string $row The element to search for.
|
|
*/
|
|
public function seek($row) {
|
|
return in_array($row, $this->stmt->fetchAll());
|
|
}
|
|
|
|
/**
|
|
* Return the number of results.
|
|
*/
|
|
public function numRecords() {
|
|
$value = $this->stmt->fetchAll();
|
|
return count($value);
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
*/
|
|
public function nextRecord() {
|
|
$record = $this->stmt->fetch(PDO::FETCH_ASSOC);
|
|
if (count($record)) {
|
|
return $record;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
?>
|