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-rw-r--r--system/database/drivers/pdo/pdo_driver.php287
1 files changed, 49 insertions, 238 deletions
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index a3ad46900..d18720ed2 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -42,8 +42,8 @@ class CI_DB_pdo_driver extends CI_DB {
public $dbdriver = 'pdo';
- // the character used to excape - not necessary for PDO
- protected $_escape_char = '';
+ // The character used to escaping
+ protected $_escape_char = '"';
// clause and character used for LIKE escape sequences
protected $_like_escape_str = " ESCAPE '%s' ";
@@ -57,10 +57,19 @@ class CI_DB_pdo_driver extends CI_DB {
protected $_count_string = 'SELECT COUNT(*) AS ';
protected $_random_keyword;
- // need to track the pdo driver and options
- public $pdodriver;
+ protected $trans_enabled = FALSE;
+
+ // 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);
@@ -69,118 +78,38 @@ 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.
- $this->pdodriver = end($match);
+ $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 = $match[1];
+ return;
}
-
- // clause and character used for LIKE escape sequences
- // this one depends on the driver being used
- if ($this->pdodriver === 'mysql')
+ elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE))
{
- $this->_escape_char = '`';
- $this->_like_escape_str = '';
- $this->_like_escape_chr = '\\';
+ $this->subdriver = 'dblib';
}
- elseif ($this->pdodriver === 'odbc')
- {
- $this->_like_escape_str = " {escape '%s'} ";
- }
- elseif ( ! in_array($this->pdodriver, array('sqlsrv', 'mssql', 'dblib', 'sybase')))
- {
- $this->_escape_char = '"';
- }
-
- $this->trans_enabled = FALSE;
- $this->_random_keyword = ' RND('.time().')'; // database specific random keyword
- }
-
- /**
- * Connection String
- *
- * @param array
- * @return void
- */
- protected function _connect_string($params)
- {
- if (strpos($this->hostname, ':'))
+ elseif ($this->subdriver === '4D')
{
- // hostname generally would have this prototype
- // $db['hostname'] = 'pdodriver:host(/Server(/DSN))=hostname(/DSN);';
- // We need to get the prefix (pdodriver used by PDO).
- $dsnarray = explode(':', $this->hostname);
- $this->pdodriver = $dsnarray[0];
-
- // End dsn with a semicolon for extra backward compability
- // if database property was not empty.
- if ( ! empty($this->database))
- {
- $this->dsn .= rtrim($this->hostname, ';').';';
- }
+ $this->subdriver = '4d';
}
- else
+ elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'sqlite', 'sqlsrv'), TRUE))
{
- // Invalid DSN, display an error
- if ( ! array_key_exists('pdodriver', $params))
- {
- show_error('Invalid DB Connection String for PDO');
- }
+ log_message('error', 'PDO: Invalid or non-existent subdriver');
- // Assuming that the following DSN string format is used:
- // $dsn = 'pdo://username:password@hostname:port/database?pdodriver=pgsql';
- $this->dsn = $this->pdodriver.':';
-
- // Add hostname to the DSN for databases that need it
- if ( ! empty($this->hostname)
- && strpos($this->hostname, ':') === FALSE
- && in_array($this->pdodriver, array('informix', 'mysql', 'pgsql', 'sybase', 'mssql', 'dblib', 'cubrid')))
+ if ($this->db_debug)
{
- $this->dsn .= 'host='.$this->hostname.';';
+ show_error('Invalid or non-existent PDO subdriver');
}
- // Add a port to the DSN for databases that can use it
- if ( ! empty($this->port) && in_array($this->pdodriver, array('informix', 'mysql', 'pgsql', 'ibm', 'cubrid')))
- {
- $this->dsn .= 'port='.$this->port.';';
- }
+ throw new Exception('Invalid or non-existent PDO subdriver');
}
- // Add the database name to the DSN, if needed
- if (stripos($this->dsn, 'dbname') === FALSE
- && in_array($this->pdodriver, array('4D', 'pgsql', 'mysql', 'firebird', 'sybase', 'mssql', 'dblib', 'cubrid')))
- {
- $this->dsn .= 'dbname='.$this->database.';';
- }
- elseif (stripos($this->dsn, 'database') === FALSE && in_array($this->pdodriver, array('ibm', 'sqlsrv')))
- {
- if (stripos($this->dsn, 'dsn') === FALSE)
- {
- $this->dsn .= 'database='.$this->database.';';
- }
- }
- elseif ($this->pdodriver === 'sqlite' && $this->dsn === 'sqlite:')
- {
- if ($this->database !== ':memory')
- {
- if ( ! file_exists($this->database))
- {
- show_error('Invalid DB Connection string for PDO SQLite');
- }
-
- $this->dsn .= (strpos($this->database, DIRECTORY_SEPARATOR) !== 0) ? DIRECTORY_SEPARATOR : '';
- }
-
- $this->dsn .= $this->database;
- }
-
- // Add charset to the DSN, if needed
- if ( ! empty($this->char_set) && in_array($this->pdodriver, array('4D', 'mysql', 'sybase', 'mssql', 'dblib', 'oci')))
- {
- $this->dsn .= 'charset='.$this->char_set.';';
- }
+ $this->dsn = NULL;
}
// --------------------------------------------------------------------
@@ -188,48 +117,13 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Non-persistent database connection
*
- * @return object
- */
- public function db_connect()
- {
- return $this->_pdo_connect();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Persistent database connection
- *
- * @return object
- */
- public function db_pconnect()
- {
- return $this->_pdo_connect(TRUE);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * PDO connection
- *
* @param bool
* @return object
*/
- protected function _pdo_connect($persistent = FALSE)
+ public function db_connect($persistent = FALSE)
{
$this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
- $persistent === FALSE OR $this->options[PDO::ATTR_PERSISTENT] = TRUE;
-
- /* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
- * on connect - it was ignored. This is a work-around for the issue.
- *
- * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
- */
- if ($this->pdodriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
- {
- $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
- .( ! empty($this->db_collat) ? " COLLATE '".$this->dbcollat."'" : '');
- }
+ $this->options[PDO::ATTR_PERSISTENT] = $persistent;
// Connecting...
try
@@ -250,6 +144,18 @@ class CI_DB_pdo_driver extends CI_DB {
// --------------------------------------------------------------------
/**
+ * Persistent database connection
+ *
+ * @return object
+ */
+ public function db_pconnect()
+ {
+ return $this->db_connect(TRUE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* Database version number
*
* @return string
@@ -358,7 +264,7 @@ class CI_DB_pdo_driver extends CI_DB {
$str = $this->conn_id->quote($str);
// If there are duplicated quotes, trim them away
- if (strpos($str, "'") === 0)
+ if ($str[0] === "'")
{
$str = substr($str, 1, -1);
}
@@ -396,69 +302,12 @@ class CI_DB_pdo_driver extends CI_DB {
*/
public function insert_id($name = NULL)
{
- if ($this->pdodriver === 'pgsql' && $name === NULL && $this->version() >= '8.1')
- {
- $query = $this->query('SELECT LASTVAL() AS ins_id');
- $query = $query->row();
- return $query->ins_id;
- }
-
return $this->conn_id->lastInsertId($name);
}
// --------------------------------------------------------------------
/**
- * 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($prefix_limit = FALSE)
- {
- if ($this->pdodriver === 'pgsql')
- {
- // Analog function to show all tables in postgre
- $sql = "SELECT * FROM information_schema.tables WHERE table_schema = 'public'";
- }
- elseif ($this->pdodriver === 'sqlite')
- {
- // Analog function to show all tables in sqlite
- $sql = "SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'";
- }
- else
- {
- $sql = 'SHOW TABLES FROM '.$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
@@ -468,23 +317,7 @@ class CI_DB_pdo_driver extends CI_DB {
*/
protected function _field_data($table)
{
- if ($this->pdodriver === 'mysql' or $this->pdodriver === 'pgsql')
- {
- // Analog function for mysql and postgre
- return 'SELECT * FROM '.$this->escape_identifiers($table).' LIMIT 1';
- }
- elseif ($this->pdodriver === 'oci')
- {
- // Analog function for oci
- return 'SELECT * FROM '.$this->escape_identifiers($table).' WHERE ROWNUM <= 1';
- }
- elseif ($this->pdodriver === 'sqlite')
- {
- // Analog function for sqlite
- return 'PRAGMA table_info('.$this->escape_identifiers($table).')';
- }
-
- return 'SELECT TOP 1 FROM '.$this->escape_identifiers($table);
+ return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);
}
// --------------------------------------------------------------------
@@ -530,7 +363,7 @@ class CI_DB_pdo_driver extends CI_DB {
*/
protected function _update_batch($table, $values, $index, $where = NULL)
{
- $ids = array();
+ $ids = array();
$where = ($where !== '' && count($where) >=1) ? implode(" ", $where).' AND ' : '';
foreach ($values as $key => $val)
@@ -582,29 +415,7 @@ class CI_DB_pdo_driver extends CI_DB {
*/
protected function _truncate($table)
{
- return 'DELETE FROM '.$table;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Limit string
- *
- * Generates a platform-specific LIMIT clause
- *
- * @param string the sql query string
- * @param int the number of rows to limit the query to
- * @param int the offset value
- * @return string
- */
- protected function _limit($sql, $limit, $offset)
- {
- if ($this->pdodriver === 'pgsql')
- {
- return $sql.' LIMIT '.$limit.($offset ? ' OFFSET '.$offset : '');
- }
-
- return $sql.' LIMIT '.($offset ? $offset.', ' : '').$limit;
+ return 'TRUNCATE TABLE '.$table;
}
}
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-19 18:27:17 +0100