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<?php
/**
* @package Joomla.Platform
* @subpackage Database
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
JLoader::register('JDatabaseQueryMySQL', dirname(__FILE__) . '/mysqlquery.php');
JLoader::register('JDatabaseExporterMySQL', dirname(__FILE__) . '/mysqlexporter.php');
JLoader::register('JDatabaseImporterMySQL', dirname(__FILE__) . '/mysqlimporter.php');
/**
* MySQL database driver
*
* @package Joomla.Platform
* @subpackage Database
* @see http://dev.mysql.com/doc/
* @since 11.1
*/
class JDatabaseMySQL extends JDatabase
{
/**
* The name of the database driver.
*
* @var string
* @since 11.1
*/
public $name = 'mysql';
/**
* The character(s) used to quote SQL statement names such as table names or field names,
* etc. The child classes should define this as necessary. If a single character string the
* same character is used for both sides of the quoted name, else the first character will be
* used for the opening quote and the second for the closing quote.
*
* @var string
* @since 11.1
*/
protected $nameQuote = '`';
/**
* The null or zero representation of a timestamp for the database driver. This should be
* defined in child classes to hold the appropriate value for the engine.
*
* @var string
* @since 11.1
*/
protected $nullDate = '0000-00-00 00:00:00';
/**
* @var string The minimum supported database version.
* @since 12.1
*/
protected $dbMinimum = '5.0.4';
/**
* Constructor.
*
* @param array $options Array of database options with keys: host, user, password, database, select.
*
* @since 11.1
*/
protected function __construct($options)
{
// Get some basic values from the options.
$options['host'] = (isset($options['host'])) ? $options['host'] : 'localhost';
$options['user'] = (isset($options['user'])) ? $options['user'] : 'root';
$options['password'] = (isset($options['password'])) ? $options['password'] : '';
$options['database'] = (isset($options['database'])) ? $options['database'] : '';
$options['select'] = (isset($options['select'])) ? (bool) $options['select'] : true;
// Make sure the MySQL extension for PHP is installed and enabled.
if (!function_exists('mysql_connect'))
{
// Legacy error handling switch based on the JError::$legacy switch.
// @deprecated 12.1
if (JError::$legacy)
{
$this->errorNum = 1;
$this->errorMsg = JText::_('JLIB_DATABASE_ERROR_ADAPTER_MYSQL');
return;
}
else
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_ADAPTER_MYSQL'));
}
}
// Attempt to connect to the server.
if (!($this->connection = @ mysql_connect($options['host'], $options['user'], $options['password'], true)))
{
// Legacy error handling switch based on the JError::$legacy switch.
// @deprecated 12.1
if (JError::$legacy)
{
$this->errorNum = 2;
$this->errorMsg = JText::_('JLIB_DATABASE_ERROR_CONNECT_MYSQL');
return;
}
else
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_CONNECT_MYSQL'));
}
}
// Finalize initialisation
parent::__construct($options);
// Set sql_mode to non_strict mode
mysql_query("SET @@SESSION.sql_mode = '';", $this->connection);
// If auto-select is enabled select the given database.
if ($options['select'] && !empty($options['database']))
{
$this->select($options['database']);
}
}
/**
* Destructor.
*
* @since 11.1
*/
public function __destruct()
{
if (is_resource($this->connection))
{
mysql_close($this->connection);
}
}
/**
* Method to escape a string for usage in an SQL statement.
*
* @param string $text The string to be escaped.
* @param boolean $extra Optional parameter to provide extra escaping.
*
* @return string The escaped string.
*
* @since 11.1
*/
public function escape($text, $extra = false)
{
$result = mysql_real_escape_string($text, $this->getConnection());
if ($extra)
{
$result = addcslashes($result, '%_');
}
return $result;
}
/**
* Test to see if the MySQL connector is available.
*
* @return boolean True on success, false otherwise.
*
* @since 11.1
*/
public static function test()
{
return (function_exists('mysql_connect'));
}
/**
* Determines if the connection to the server is active.
*
* @return boolean True if connected to the database engine.
*
* @since 11.1
*/
public function connected()
{
if (is_resource($this->connection))
{
return mysql_ping($this->connection);
}
return false;
}
/**
* Drops a table from the database.
*
* @param string $tableName The name of the database table to drop.
* @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
*
* @return JDatabaseMySQL Returns this object to support chaining.
*
* @since 11.1
* @throws JDatabaseException
*/
public function dropTable($tableName, $ifExists = true)
{
$query = $this->getQuery(true);
$this->setQuery('DROP TABLE ' . ($ifExists ? 'IF EXISTS ' : '') . $query->quoteName($tableName));
$this->execute();
return $this;
}
/**
* Get the number of affected rows for the previous executed SQL statement.
*
* @return integer The number of affected rows.
*
* @since 11.1
*/
public function getAffectedRows()
{
return mysql_affected_rows($this->connection);
}
/**
* Method to get the database collation in use by sampling a text field of a table in the database.
*
* @return mixed The collation in use by the database (string) or boolean false if not supported.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getCollation()
{
$this->setQuery('SHOW FULL COLUMNS FROM #__users');
$array = $this->loadAssocList();
return $array['2']['Collation'];
}
/**
* Gets an exporter class object.
*
* @return JDatabaseExporterMySQL An exporter object.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getExporter()
{
// Make sure we have an exporter class for this driver.
if (!class_exists('JDatabaseExporterMySQL'))
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_MISSING_EXPORTER'));
}
$o = new JDatabaseExporterMySQL;
$o->setDbo($this);
return $o;
}
/**
* Gets an importer class object.
*
* @return JDatabaseImporterMySQL An importer object.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getImporter()
{
// Make sure we have an importer class for this driver.
if (!class_exists('JDatabaseImporterMySQL'))
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_MISSING_IMPORTER'));
}
$o = new JDatabaseImporterMySQL;
$o->setDbo($this);
return $o;
}
/**
* Get the number of returned rows for the previous executed SQL statement.
*
* @param resource $cursor An optional database cursor resource to extract the row count from.
*
* @return integer The number of returned rows.
*
* @since 11.1
*/
public function getNumRows($cursor = null)
{
return mysql_num_rows($cursor ? $cursor : $this->cursor);
}
/**
* Get the current or query, or new JDatabaseQuery object.
*
* @param boolean $new False to return the last query set, True to return a new JDatabaseQuery object.
*
* @return mixed The current value of the internal SQL variable or a new JDatabaseQuery object.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getQuery($new = false)
{
if ($new)
{
// Make sure we have a query class for this driver.
if (!class_exists('JDatabaseQueryMySQL'))
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_MISSING_QUERY'));
}
return new JDatabaseQueryMySQL($this);
}
else
{
return $this->sql;
}
}
/**
* Shows the table CREATE statement that creates the given tables.
*
* @param mixed $tables A table name or a list of table names.
*
* @return array A list of the create SQL for the tables.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getTableCreate($tables)
{
// Initialise variables.
$result = array();
// Sanitize input to an array and iterate over the list.
settype($tables, 'array');
foreach ($tables as $table)
{
// Set the query to get the table CREATE statement.
$this->setQuery('SHOW CREATE table ' . $this->quoteName($this->escape($table)));
$row = $this->loadRow();
// Populate the result array based on the create statements.
$result[$table] = $row[1];
}
return $result;
}
/**
* Retrieves field information about a given table.
*
* @param string $table The name of the database table.
* @param boolean $typeOnly True to only return field types.
*
* @return array An array of fields for the database table.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getTableColumns($table, $typeOnly = true)
{
$result = array();
// Set the query to get the table fields statement.
$this->setQuery('SHOW FULL COLUMNS FROM ' . $this->quoteName($this->escape($table)));
$fields = $this->loadObjectList();
// If we only want the type as the value add just that to the list.
if ($typeOnly)
{
foreach ($fields as $field)
{
$result[$field->Field] = preg_replace("/[(0-9)]/", '', $field->Type);
}
}
// If we want the whole field data object add that to the list.
else
{
foreach ($fields as $field)
{
$result[$field->Field] = $field;
}
}
return $result;
}
/**
* Get the details list of keys for a table.
*
* @param string $table The name of the table.
*
* @return array An array of the column specification for the table.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getTableKeys($table)
{
// Get the details columns information.
$this->setQuery('SHOW KEYS FROM ' . $this->quoteName($table));
$keys = $this->loadObjectList();
return $keys;
}
/**
* Method to get an array of all tables in the database.
*
* @return array An array of all the tables in the database.
*
* @since 11.1
* @throws JDatabaseException
*/
public function getTableList()
{
// Set the query to get the tables statement.
$this->setQuery('SHOW TABLES');
$tables = $this->loadColumn();
return $tables;
}
/**
* Get the version of the database connector.
*
* @return string The database connector version.
*
* @since 11.1
*/
public function getVersion()
{
return mysql_get_server_info($this->connection);
}
/**
* Determines if the database engine supports UTF-8 character encoding.
*
* @return boolean True if supported.
*
* @since 11.1
* @deprecated 12.1
*/
public function hasUTF()
{
JLog::add('JDatabaseMySQL::hasUTF() is deprecated.', JLog::WARNING, 'deprecated');
return true;
}
/**
* Method to get the auto-incremented value from the last INSERT statement.
*
* @return integer The value of the auto-increment field from the last inserted row.
*
* @since 11.1
*/
public function insertid()
{
return mysql_insert_id($this->connection);
}
/**
* Locks a table in the database.
*
* @param string $table The name of the table to unlock.
*
* @return JDatabaseMySQL Returns this object to support chaining.
*
* @since 11.4
* @throws JDatabaseException
*/
public function lockTable($table)
{
$this->setQuery('LOCK TABLES ' . $this->quoteName($table) . ' WRITE')->execute();
return $this;
}
/**
* Execute the SQL statement.
*
* @return mixed A database cursor resource on success, boolean false on failure.
*
* @since 11.1
* @throws JDatabaseException
*/
public function execute()
{
if (!is_resource($this->connection))
{
// Legacy error handling switch based on the JError::$legacy switch.
// @deprecated 12.1
if (JError::$legacy)
{
if ($this->debug)
{
JError::raiseError(500, 'JDatabaseMySQL::query: ' . $this->errorNum . ' - ' . $this->errorMsg);
}
return false;
}
else
{
JLog::add(JText::sprintf('JLIB_DATABASE_QUERY_FAILED', $this->errorNum, $this->errorMsg), JLog::ERROR, 'database');
throw new JDatabaseException($this->errorMsg, $this->errorNum);
}
}
// Take a local copy so that we don't modify the original query and cause issues later
$sql = $this->replacePrefix((string) $this->sql);
if ($this->limit > 0 || $this->offset > 0)
{
$sql .= ' LIMIT ' . $this->offset . ', ' . $this->limit;
}
// If debugging is enabled then let's log the query.
if ($this->debug)
{
// Increment the query counter and add the query to the object queue.
$this->count++;
$this->log[] = $sql;
JLog::add($sql, JLog::DEBUG, 'databasequery');
}
// Reset the error values.
$this->errorNum = 0;
$this->errorMsg = '';
// Execute the query.
$this->cursor = mysql_query($sql, $this->connection);
// If an error occurred handle it.
if (!$this->cursor)
{
$this->errorNum = (int) mysql_errno($this->connection);
$this->errorMsg = (string) mysql_error($this->connection) . ' SQL=' . $sql;
// Legacy error handling switch based on the JError::$legacy switch.
// @deprecated 12.1
if (JError::$legacy)
{
if ($this->debug)
{
JError::raiseError(500, 'JDatabaseMySQL::query: ' . $this->errorNum . ' - ' . $this->errorMsg);
}
return false;
}
else
{
JLog::add(JText::sprintf('JLIB_DATABASE_QUERY_FAILED', $this->errorNum, $this->errorMsg), JLog::ERROR, 'databasequery');
throw new JDatabaseException($this->errorMsg, $this->errorNum);
}
}
return $this->cursor;
}
/**
* Renames a table in the database.
*
* @param string $oldTable The name of the table to be renamed
* @param string $newTable The new name for the table.
* @param string $backup Not used by MySQL.
* @param string $prefix Not used by MySQL.
*
* @return JDatabase Returns this object to support chaining.
*
* @since 11.4
* @throws JDatabaseException
*/
public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
{
$this->setQuery('RENAME TABLE ' . $oldTable . ' TO ' . $newTable)->execute();
return $this;
}
/**
* Select a database for use.
*
* @param string $database The name of the database to select for use.
*
* @return boolean True if the database was successfully selected.
*
* @since 11.1
* @throws JDatabaseException
*/
public function select($database)
{
if (!$database)
{
return false;
}
if (!mysql_select_db($database, $this->connection))
{
// Legacy error handling switch based on the JError::$legacy switch.
// @deprecated 12.1
if (JError::$legacy)
{
$this->errorNum = 3;
$this->errorMsg = JText::_('JLIB_DATABASE_ERROR_DATABASE_CONNECT');
return false;
}
else
{
throw new JDatabaseException(JText::_('JLIB_DATABASE_ERROR_DATABASE_CONNECT'));
}
}
return true;
}
/**
* Set the connection to use UTF-8 character encoding.
*
* @return boolean True on success.
*
* @since 11.1
*/
public function setUTF()
{
return mysql_query("SET NAMES 'utf8'", $this->connection);
}
/**
* Method to commit a transaction.
*
* @return void
*
* @since 11.1
* @throws JDatabaseException
*/
public function transactionCommit()
{
$this->setQuery('COMMIT');
$this->execute();
}
/**
* Method to roll back a transaction.
*
* @return void
*
* @since 11.1
* @throws JDatabaseException
*/
public function transactionRollback()
{
$this->setQuery('ROLLBACK');
$this->execute();
}
/**
* Method to initialize a transaction.
*
* @return void
*
* @since 11.1
* @throws JDatabaseException
*/
public function transactionStart()
{
$this->setQuery('START TRANSACTION');
$this->execute();
}
/**
* Method to fetch a row from the result set cursor as an array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
* @since 11.1
*/
protected function fetchArray($cursor = null)
{
return mysql_fetch_row($cursor ? $cursor : $this->cursor);
}
/**
* Method to fetch a row from the result set cursor as an associative array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
* @since 11.1
*/
protected function fetchAssoc($cursor = null)
{
return mysql_fetch_assoc($cursor ? $cursor : $this->cursor);
}
/**
* Method to fetch a row from the result set cursor as an object.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
* @param string $class The class name to use for the returned row object.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
* @since 11.1
*/
protected function fetchObject($cursor = null, $class = 'stdClass')
{
return mysql_fetch_object($cursor ? $cursor : $this->cursor, $class);
}
/**
* Method to free up the memory used for the result set.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return void
*
* @since 11.1
*/
protected function freeResult($cursor = null)
{
mysql_free_result($cursor ? $cursor : $this->cursor);
}
/**
* Diagnostic method to return explain information for a query.
*
* @return string The explain output.
*
* @since 11.1
* @deprecated 12.1
*/
public function explain()
{
// Deprecation warning.
JLog::add('JDatabaseMySQL::explain() is deprecated.', JLog::WARNING, 'deprecated');
// Backup the current query so we can reset it later.
$backup = $this->sql;
// Prepend the current query with EXPLAIN so we get the diagnostic data.
$this->sql = 'EXPLAIN ' . $this->sql;
// Execute the query and get the result set cursor.
if (!($cursor = $this->execute()))
{
return null;
}
// Build the HTML table.
$first = true;
$buffer = '<table id="explain-sql">';
$buffer .= '<thead><tr><td colspan="99">' . $this->getQuery() . '</td></tr>';
while ($row = $this->fetchAssoc($cursor))
{
if ($first)
{
$buffer .= '<tr>';
foreach ($row as $k => $v)
{
$buffer .= '<th>' . $k . '</th>';
}
$buffer .= '</tr></thead><tbody>';
$first = false;
}
$buffer .= '<tr>';
foreach ($row as $k => $v)
{
$buffer .= '<td>' . $v . '</td>';
}
$buffer .= '</tr>';
}
$buffer .= '</tbody></table>';
// Restore the original query to its state before we ran the explain.
$this->sql = $backup;
// Free up system resources and return.
$this->freeResult($cursor);
return $buffer;
}
/**
* Execute a query batch.
*
* @param boolean $abortOnError Abort on error.
* @param boolean $transactionSafe Transaction safe queries.
*
* @return mixed A database resource if successful, false if not.
*
* @deprecated 12.1
* @since 11.1
*/
public function queryBatch($abortOnError = true, $transactionSafe = false)
{
// Deprecation warning.
JLog::add('JDatabaseMySQL::queryBatch() is deprecated.', JLog::WARNING, 'deprecated');
$sql = $this->replacePrefix((string) $this->sql);
$this->errorNum = 0;
$this->errorMsg = '';
// If the batch is meant to be transaction safe then we need to wrap it in a transaction.
if ($transactionSafe)
{
$sql = 'START TRANSACTION;' . rtrim($sql, "; \t\r\n\0") . '; COMMIT;';
}
$queries = $this->splitSql($sql);
$error = 0;
foreach ($queries as $query)
{
$query = trim($query);
if ($query != '')
{
$this->cursor = mysql_query($query, $this->connection);
if ($this->debug)
{
$this->count++;
$this->log[] = $query;
}
if (!$this->cursor)
{
$error = 1;
$this->errorNum .= mysql_errno($this->connection) . ' ';
$this->errorMsg .= mysql_error($this->connection) . " SQL=$query <br />";
if ($abortOnError)
{
return $this->cursor;
}
}
}
}
return $error ? false : true;
}
/**
* Unlocks tables in the database.
*
* @return JDatabaseMySQL Returns this object to support chaining.
*
* @since 11.4
* @throws JDatabaseException
*/
public function unlockTables()
{
$this->setQuery('UNLOCK TABLES')->execute();
return $this;
}
}