mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
f912a33b63
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@41712 467b73ca-7a2a-4603-9d3b-597d59a354a9
450 lines
13 KiB
PHP
450 lines
13 KiB
PHP
<?php
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/**
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* @package sapphire
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* @subpackage core
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*/
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/**
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* MySQL connector class.
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*/
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class MySQLDatabase 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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* Connect to a MySQL database.
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* @param array $parameters An map of parameters, which should include:
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* <ul><li>server: The server, eg, localhost</li>
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* <li>username: The username to log on with</li>
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* <li>password: The password to log on with</li>
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* <li>database: The database to connect to</li>
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*/
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public function __construct($parameters) {
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$this->dbConn = mysql_connect($parameters['server'], $parameters['username'], $parameters['password']);
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$this->active = mysql_select_db($parameters['database'], $this->dbConn);
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$this->database = $parameters['database'];
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if(!$this->dbConn) {
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$this->databaseError("Couldn't connect to MySQL database");
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}
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parent::__construct();
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}
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/**
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* Not implemented, needed for PDO
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*/
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public function getConnect($parameters) {
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return null;
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}
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/**
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* Returns true if this database supports collations
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* @return boolean
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*/
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public function supportsCollations() {
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return $this->getVersion() >= 4.1;
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}
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/**
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* The version of MySQL.
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* @var float
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*/
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private $mysqlVersion;
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/**
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* Get the version of MySQL.
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* @return float
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*/
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public function getVersion() {
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if(!$this->mysqlVersion) {
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$this->mysqlVersion = (float)$this->query("SELECT VERSION()")->value();
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}
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return $this->mysqlVersion;
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}
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/**
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* Get the database server, namely mysql.
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* @return string
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*/
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public function getDatabaseServer() {
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return "mysql";
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}
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public function query($sql, $errorLevel = E_USER_ERROR) {
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if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,strpos($sql,' '))), array('insert','update','delete','replace'))) {
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echo "<p>Will execute: $sql</p>";
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return;
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}
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if(isset($_REQUEST['showqueries'])) {
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$starttime = microtime(true);
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}
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$handle = mysql_query($sql, $this->dbConn);
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if(isset($_REQUEST['showqueries'])) {
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$endtime = round(microtime(true) - $starttime,4);
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Debug::message("\n$sql\n{$endtime}ms\n", false);
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}
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if(!$handle && $errorLevel) $this->databaseError("Couldn't run query: $sql | " . mysql_error($this->dbConn), $errorLevel);
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return new MySQLQuery($this, $handle);
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}
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public function getGeneratedID($table) {
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return mysql_insert_id($this->dbConn);
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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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*
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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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$result = $this->query("SELECT MAX(ID)+1 FROM `$table`")->value();
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return $result ? $result : 1;
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}
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public function isActive() {
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return $this->active ? true : false;
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}
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public function createDatabase($connect, $username, $password, $db) {
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$this->query("CREATE DATABASE $this->database");
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$this->query("USE $this->database");
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$this->tableList = $this->fieldList = $this->indexList = null;
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if(mysql_select_db($this->database, $this->dbConn)) {
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$this->active = true;
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return true;
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}
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}
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/**
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* Drop the database that this object is currently connected to.
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* Use with caution.
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*/
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public function dropDatabase() {
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$this->query("DROP DATABASE $this->database");
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}
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/**
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* Returns the name of the currently selected database
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*/
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public function currentDatabase() {
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return $this->database;
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}
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/**
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* Switches to the given database.
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* If the database doesn't exist, you should call createDatabase() after calling selectDatabase()
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*/
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public function selectDatabase($dbname) {
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$this->database = $dbname;
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if($this->databaseExists($this->database)) mysql_select_db($this->database, $this->dbConn);
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$this->tableList = $this->fieldList = $this->indexList = null;
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}
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/**
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* Returns true if the named database exists.
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*/
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public function databaseExists($name) {
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$SQL_name = Convert::raw2sql($name);
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return $this->query("SHOW DATABASES LIKE '$SQL_name'")->value() ? true : false;
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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) foreach($fields as $k => $v) $fieldSchemas .= "`$k` $v,\n";
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if($indexes) foreach($indexes as $k => $v) $fieldSchemas .= $this->getIndexSqlDefinition($k, $v) . ",\n";
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$this->query("CREATE TABLE `$tableName` (
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ID int(11) not null auto_increment,
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$fieldSchemas
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$indexSchemas
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primary key (ID)
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) TYPE=MyISAM");
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}
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/**
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* Alter a table's schema.
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* @param $table The name of the table to alter
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* @param $newFields New fields, a map of field name => field schema
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* @param $newIndexes New indexes, a map of index name => index type
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* @param $alteredFields Updated fields, a map of field name => field schema
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* @param $alteredIndexes Updated indexes, a map of index name => index type
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*/
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public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null) {
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$fieldSchemas = $indexSchemas = "";
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if($newFields) foreach($newFields as $k => $v) $alterList[] .= "ADD `$k` $v";
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if($newIndexes) foreach($newIndexes as $k => $v) $alterList[] .= "ADD " . $this->getIndexSqlDefinition($k, $v);
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if($alteredFields) foreach($alteredFields as $k => $v) $alterList[] .= "CHANGE `$k` `$k` $v";
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if($alteredIndexes) foreach($alteredIndexes as $k => $v) {
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$alterList[] .= "DROP INDEX `$k`";
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$alterList[] .= "ADD ". $this->getIndexSqlDefinition($k, $v);
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}
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$alterations = implode(",\n", $alterList);
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$this->query("ALTER TABLE `$tableName` " . $alterations);
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}
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public function renameTable($oldTableName, $newTableName) {
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$this->query("ALTER TABLE `$oldTableName` RENAME `$newTableName`");
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}
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/**
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* Checks a table's integrity and repairs it if necessary.
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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(!$this->runTableCheckCommand("CHECK TABLE `$tableName`")) {
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Database::alteration_message("Table $tableName: repaired","repaired");
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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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}
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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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$testResults = $this->query($sql);
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foreach($testResults 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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public function createField($tableName, $fieldName, $fieldSpec) {
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$this->query("ALTER TABLE `$tableName` ADD `$fieldName` $fieldSpec");
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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 $tableName The name of the tbale the field is in.
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* @param string $fieldName The name of the field to change.
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* @param string $fieldSpec The new field specification
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*/
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public function alterField($tableName, $fieldName, $fieldSpec) {
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// This wee function was built for MoT. It will preserve the binary format of the content,
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// but change the character set
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/*
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$changes = $this->query("SELECT ID, `$fieldName` FROM `$tableName`")->map();
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*/
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$this->query("ALTER TABLE `$tableName` CHANGE `$fieldName` `$fieldName` $fieldSpec");
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// This wee function was built for MoT. It will preserve the binary format of the content,
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// but change the character set
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/*
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echo "<li>Fixing " . sizeof($changes) . " page's contnet";
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foreach($changes as $id => $text) {
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$SQL_text = Convert::raw2sql($text);
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$this->query("UPDATE `$tableName` SET `$fieldName` = '$SQL_text' WHERE ID = '$id'");
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}
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*/
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}
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public function fieldList($table) {
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$fields = DB::query("SHOW FULL FIELDS IN `$table`");
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foreach($fields 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'] && $field['Collation'] != 'NULL') {
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$collInfo = DB::query("SHOW COLLATION LIKE '$field[Collation]'")->record();
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$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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return $fieldList;
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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 $indexSpec The specification of the index, see Database::requireIndex() for more details.
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*/
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public function createIndex($tableName, $indexName, $indexSpec) {
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$this->query("ALTER TABLE `$tableName` ADD " . $this->getIndexSqlDefinition($indexName, $indexSpec));
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}
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protected function getIndexSqlDefinition($indexName, $indexSpec) {
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$indexSpec = trim($indexSpec);
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if($indexSpec[0] != '(') list($indexType, $indexFields) = explode(' ',$indexSpec,2);
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else $indexFields = $indexSpec;
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if(!isset($indexType)) {
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$indexType = "index";
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}
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return "$indexType `$indexName` $indexFields";
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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 $indexSpec The specification of the index, see Database::requireIndex() for more details.
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*/
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public function alterIndex($tableName, $indexName, $indexSpec) {
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$indexSpec = trim($indexSpec);
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if($indexSpec[0] != '(') {
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list($indexType, $indexFields) = explode(' ',$indexSpec,2);
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} else {
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$indexFields = $indexSpec;
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}
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if(!$indexType) {
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$indexType = "index";
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}
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$this->query("ALTER TABLE `$tableName` DROP INDEX `$indexName`");
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$this->query("ALTER TABLE `$tableName` ADD $indexType `$indexName` $indexFields");
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}
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/**
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* Return the list of indexes in a table.
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* @param string $table The table name.
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* @return array
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*/
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public function indexList($table) {
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$indexes = DB::query("SHOW INDEXES IN `$table`");
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foreach($indexes as $index) {
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$groupedIndexes[$index['Key_name']]['fields'][$index['Seq_in_index']] = $index['Column_name'];
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if($index['Index_type'] == 'FULLTEXT') {
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$groupedIndexes[$index['Key_name']]['type'] = 'fulltext ';
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} else if(!$index['Non_unique']) {
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$groupedIndexes[$index['Key_name']]['type'] = 'unique ';
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} else {
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$groupedIndexes[$index['Key_name']]['type'] = '';
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}
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}
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foreach($groupedIndexes as $index => $details) {
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ksort($details['fields']);
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$indexList[$index] = $details['type'] . '(' . implode(',',$details['fields']) . ')';
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}
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return $indexList;
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}
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/**
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* Returns a list of all the tables in the database.
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* Table names will all be in lowercase.
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* @return array
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*/
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public function tableList() {
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foreach($this->query("SHOW TABLES") as $record) {
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$table = strtolower(reset($record));
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$tables[$table] = $table;
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}
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return isset($tables) ? $tables : null;
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}
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/**
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* Return the number of rows affected by the previous operation.
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* @return int
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*/
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public function affectedRows() {
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return mysql_affected_rows($this->dbConn);
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}
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}
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/**
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* A result-set from a MySQL database.
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*/
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class MySQLQuery extends Query {
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/**
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* The MySQLDatabase object that created this result set.
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* @var MySQLDatabase
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*/
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private $database;
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/**
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* The internal MySQL handle that points to the result set.
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* @var resource
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*/
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private $handle;
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/**
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* Hook the result-set given into a Query class, suitable for use by sapphire.
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* @param database The database object that created this query.
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* @param handle the internal mysql handle that is points to the resultset.
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*/
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public function __construct(MySQLDatabase $database, $handle) {
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$this->database = $database;
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$this->handle = $handle;
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parent::__construct();
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}
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public function __destroy() {
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mysql_free_result($this->handle);
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}
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public function seek($row) {
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return mysql_data_seek($this->handle, $row);
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}
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public function numRecords() {
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return mysql_num_rows($this->handle);
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}
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public function nextRecord() {
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// Coalesce rather than replace common fields.
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if($data = mysql_fetch_row($this->handle)) {
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foreach($data as $columnIdx => $value) {
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$columnName = mysql_field_name($this->handle, $columnIdx);
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// $value || !$ouput[$columnName] means that the *last* occurring value is shown
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// !$ouput[$columnName] means that the *first* occurring value is shown
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if(isset($value) || !isset($output[$columnName])) {
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$output[$columnName] = $value;
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}
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}
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return $output;
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} else {
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return false;
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}
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}
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}
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?>
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