diff options
Diffstat (limited to 'system/database/drivers/pdo/pdo_driver.php')
| -rw-r--r-- | system/database/drivers/pdo/pdo_driver.php | 109 |
1 files changed, 25 insertions, 84 deletions
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php index 9c140a69b..ab1e4ce23 100644 --- a/system/database/drivers/pdo/pdo_driver.php +++ b/system/database/drivers/pdo/pdo_driver.php @@ -42,7 +42,7 @@ class CI_DB_pdo_driver extends CI_DB { public $dbdriver = 'pdo'; - // the character used to excape - not necessary for PDO + // The character used to escaping protected $_escape_char = '"'; // clause and character used for LIKE escape sequences @@ -62,6 +62,14 @@ class CI_DB_pdo_driver extends CI_DB { // need to track the PDO options public $options = array(); + /** + * Constructor + * + * Validates the DSN string and/or detects the subdriver + * + * @param array + * @return void + */ public function __construct($params) { parent::__construct($params); @@ -71,14 +79,17 @@ class CI_DB_pdo_driver extends CI_DB { // If there is a minimum valid dsn string pattern found, we're done // This is for general PDO users, who tend to have a full DSN string. $this->subdriver = $match[1]; + return; } - else + // Legacy support for DSN specified in the hostname field + elseif (preg_match('/([^;]+):/', $this->hostname, $match) && count($match) === 2) { - // Try to build a complete DSN string from params - $this->_connect_string($params); + $this->dsn = $this->hostname; + $this->hostname = NULL; + $this->subdriver = $match[1]; + return; } - - if (in_array($this->subdriver, array('mssql', 'sybase'), TRUE)) + elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE)) { $this->subdriver = 'dblib'; } @@ -86,52 +97,19 @@ class CI_DB_pdo_driver extends CI_DB { { $this->subdriver = '4d'; } - - // clause and character used for LIKE escape sequences - // this one depends on the driver being used - if ($this->subdriver === 'odbc') + elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'sqlite', 'sqlsrv'), TRUE)) { - $this->_escape_char = ''; - $this->_like_escape_str = " {escape '%s'} "; - } - } + log_message('error', 'PDO: Invalid or non-existent subdriver'); - /** - * Connection String - * - * @param array - * @return void - */ - protected function _connect_string($params) - { - if (strpos($this->hostname, ':')) - { - // hostname generally would have this prototype - // $db['hostname'] = 'subdriver:host(/Server(/DSN))=hostname(/DSN);'; - // We need to get the prefix (subdriver used by PDO). - $dsnarray = explode(':', $this->hostname); - $this->subdriver = $dsnarray[0]; - - // End dsn with a semicolon for extra backward compability - // if database property was not empty. - if ( ! empty($this->database)) + if ($this->db_debug) { - $this->dsn .= rtrim($this->hostname, ';').';'; + show_error('Invalid or non-existent PDO subdriver'); } - } - else - { - // Invalid DSN, display an error - if ( ! array_key_exists('subdriver', $params)) - { - show_error('Invalid DB Connection String for PDO'); - } - - // Assuming that the following DSN string format is used: - // $dsn = 'pdo://username:password@hostname:port/database?subdriver=pgsql'; - $this->dsn = $this->subdriver.':'; + throw new Exception('Invalid or non-existent PDO subdriver'); } + + $this->dsn = NULL; } // -------------------------------------------------------------------- @@ -330,43 +308,6 @@ class CI_DB_pdo_driver extends CI_DB { // -------------------------------------------------------------------- /** - * Show table query - * - * Generates a platform-specific query string so that the table names can be fetched - * - * @param bool - * @return string - */ - protected function _list_tables($prefix_limit = FALSE) - { - $sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database); - - if ($prefix_limit !== FALSE AND $this->dbprefix !== '') - { - return FALSE; - } - - return $sql; - } - - // -------------------------------------------------------------------- - - /** - * Show column query - * - * Generates a platform-specific query string so that the column names can be fetched - * - * @param string the table name - * @return string - */ - protected function _list_columns($table = '') - { - return 'SHOW COLUMNS FROM '.$this->escape_identifiers($table); - } - - // -------------------------------------------------------------------- - - /** * Field data query * * Generates a platform-specific query so that the column data can be retrieved @@ -376,7 +317,7 @@ class CI_DB_pdo_driver extends CI_DB { */ protected function _field_data($table) { - return 'SELECT TOP 1 FROM '.$this->escape_identifiers($table); + return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table); } // -------------------------------------------------------------------- |