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-rw-r--r--system/database/drivers/pdo/pdo_driver.php478
1 files changed, 120 insertions, 358 deletions
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index 83a9c31ca..f4c3a7438 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* PDO Database Adapter Class
*
@@ -42,28 +40,28 @@
*/
class CI_DB_pdo_driver extends CI_DB {
- var $dbdriver = 'pdo';
+ public $dbdriver = 'pdo';
// the character used to excape - not necessary for PDO
- var $_escape_char = '';
+ protected $_escape_char = '';
// clause and character used for LIKE escape sequences
- var $_like_escape_str;
- var $_like_escape_chr;
+ protected $_like_escape_str = " ESCAPE '%s' ";
+ protected $_like_escape_chr = '!';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
* used for the count_all() and count_all_results() functions.
*/
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword;
+ protected $_count_string = 'SELECT COUNT(*) AS ';
+ protected $_random_keyword;
// need to track the pdo driver and options
- var $pdodriver;
- var $options = array();
+ public $pdodriver;
+ public $options = array();
- function __construct($params)
+ public function __construct($params)
{
parent::__construct($params);
@@ -83,32 +81,30 @@ class CI_DB_pdo_driver extends CI_DB {
// this one depends on the driver being used
if ($this->pdodriver == 'mysql')
{
+ $this->_escape_char = '`';
$this->_like_escape_str = '';
$this->_like_escape_chr = '';
}
elseif ($this->pdodriver == 'odbc')
{
$this->_like_escape_str = " {escape '%s'} ";
- $this->_like_escape_chr = '!';
}
- else
+ elseif ( ! in_array($this->pdodriver, array('sqlsrv', 'mssql', 'dblib', 'sybase')))
{
- $this->_like_escape_str = " ESCAPE '%s' ";
- $this->_like_escape_chr = '!';
+ $this->_escape_char = '"';
}
-
- $this->trans_enabled = FALSE;
+
+ $this->trans_enabled = FALSE;
$this->_random_keyword = ' RND('.time().')'; // database specific random keyword
}
/**
* Connection String
*
- * @access private
* @param array
* @return void
*/
- function _connect_string($params)
+ protected function _connect_string($params)
{
if (strpos($this->hostname, ':'))
{
@@ -138,7 +134,7 @@ class CI_DB_pdo_driver extends CI_DB {
$this->dsn = $this->pdodriver.':';
// Add hostname to the DSN for databases that need it
- if ( ! empty($this->hostname)
+ if ( ! empty($this->hostname)
&& strpos($this->hostname, ':') === FALSE
&& in_array($this->pdodriver, array('informix', 'mysql', 'pgsql', 'sybase', 'mssql', 'dblib', 'cubrid')))
{
@@ -153,7 +149,7 @@ class CI_DB_pdo_driver extends CI_DB {
}
// Add the database name to the DSN, if needed
- if (stripos($this->dsn, 'dbname') === FALSE
+ if (stripos($this->dsn, 'dbname') === FALSE
&& in_array($this->pdodriver, array('4D', 'pgsql', 'mysql', 'firebird', 'sybase', 'mssql', 'dblib', 'cubrid')))
{
$this->dsn .= 'dbname='.$this->database.';';
@@ -187,17 +183,16 @@ class CI_DB_pdo_driver extends CI_DB {
}
}
+ // --------------------------------------------------------------------
+
/**
* Non-persistent database connection
*
- * @access private called by the base class
- * @return resource
+ * @return object
*/
- function db_connect()
+ public function db_connect()
{
- $this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
-
- return $this->pdo_connect();
+ return $this->_pdo_connect();
}
// --------------------------------------------------------------------
@@ -205,15 +200,11 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Persistent database connection
*
- * @access private called by the base class
- * @return resource
+ * @return object
*/
- function db_pconnect()
+ public function db_pconnect()
{
- $this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
- $this->options[PDO::ATTR_PERSISTENT] = TRUE;
-
- return $this->pdo_connect();
+ return $this->_pdo_connect(TRUE);
}
// --------------------------------------------------------------------
@@ -221,23 +212,31 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* PDO connection
*
- * @access private called by the PDO driver class
- * @return resource
+ * @param bool
+ * @return object
*/
- function pdo_connect()
+ protected function _pdo_connect($persistent = FALSE)
{
- // Refer : http://php.net/manual/en/ref.pdo-mysql.connection.php
- if ($this->pdodriver == 'mysql' && is_php('5.3.6'))
+ $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->subdriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
{
- $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = "SET NAMES $this->char_set COLLATE '$this->dbcollat'";
+ $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
+ .( ! empty($this->db_collat) ? " COLLATE '".$this->dbcollat."'" : '');
}
// Connecting...
- try
+ try
{
- $db = new PDO($this->dsn, $this->username, $this->password, $this->options);
- }
- catch (PDOException $e)
+ return new PDO($this->dsn, $this->username, $this->password, $this->options);
+ }
+ catch (PDOException $e)
{
if ($this->db_debug && empty($this->failover))
{
@@ -246,43 +245,6 @@ class CI_DB_pdo_driver extends CI_DB {
return FALSE;
}
-
- return $db;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Reconnect
- *
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
- *
- * @access public
- * @return void
- */
- function reconnect()
- {
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
-
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Select the database
- *
- * @access private called by the base class
- * @return resource
- */
- function db_select()
- {
- // Not needed for PDO
- return TRUE;
}
// --------------------------------------------------------------------
@@ -304,53 +266,12 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
- * @param string an SQL query
- * @return object
- */
- function _execute($sql)
- {
- $sql = $this->_prep_query($sql);
-
- $result_id = $this->conn_id->query($sql);
-
- if (is_object($result_id))
- {
- $this->affect_rows = $result_id->rowCount();
- }
- else
- {
- $this->affect_rows = 0;
- }
-
- return $result_id;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
* @param string an SQL query
- * @return string
+ * @return mixed
*/
- function _prep_query($sql)
+ protected function _execute($sql)
{
- if ($this->pdodriver === 'pgsql')
- {
- // Change the backtick(s) for Postgre
- $sql = str_replace('`', '"', $sql);
- }
- elseif ($this->pdodriver === 'sqlite')
- {
- // Change the backtick(s) for SQLite
- $sql = str_replace('`', '', $sql);
- }
-
- return $sql;
+ return $this->conn_id->query($sql);
}
// --------------------------------------------------------------------
@@ -358,18 +279,12 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ public function trans_begin($test_mode = FALSE)
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -377,7 +292,7 @@ class CI_DB_pdo_driver extends CI_DB {
// Reset the transaction failure flag.
// If the $test_mode flag is set to TRUE transactions will be rolled back
// even if the queries produce a successful result.
- $this->_trans_failure = (bool) ($test_mode === TRUE);
+ $this->_trans_failure = ($test_mode === TRUE);
return $this->conn_id->beginTransaction();
}
@@ -387,25 +302,17 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ public function trans_commit()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
- $ret = $this->conn->commit();
-
- return $ret;
+ return $this->conn_id->commit();
}
// --------------------------------------------------------------------
@@ -413,25 +320,17 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ public function trans_rollback()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
- $ret = $this->conn_id->rollBack();
-
- return $ret;
+ return $this->conn_id->rollBack();
}
// --------------------------------------------------------------------
@@ -439,12 +338,11 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
@@ -455,24 +353,22 @@ class CI_DB_pdo_driver extends CI_DB {
return $str;
}
-
- //Escape the string
+
+ // Escape the string
$str = $this->conn_id->quote($str);
-
- //If there are duplicated quotes, trim them away
+
+ // If there are duplicated quotes, trim them away
if (strpos($str, "'") === 0)
{
$str = substr($str, 1, -1);
}
-
+
// escape LIKE condition wildcards
if ($like === TRUE)
{
- $str = str_replace( array('%', '_', $this->_like_escape_chr),
- array($this->_like_escape_chr.'%',
- $this->_like_escape_chr.'_',
- $this->_like_escape_chr.$this->_like_escape_chr),
- $str);
+ return str_replace(array($this->_like_escape_chr, '%', '_'),
+ array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'),
+ $str);
}
return $str;
@@ -483,12 +379,11 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
- return $this->affect_rows;
+ return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
}
// --------------------------------------------------------------------
@@ -496,6 +391,7 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Insert ID
*
+ * @param string
* @return int
*/
public function insert_id($name = NULL)
@@ -518,11 +414,10 @@ class CI_DB_pdo_driver extends CI_DB {
* Generates a platform-specific query string that counts all records in
* the specified database
*
- * @access public
* @param string
* @return string
*/
- function count_all($table = '')
+ public function count_all($table = '')
{
if ($table == '')
{
@@ -550,25 +445,29 @@ class CI_DB_pdo_driver extends CI_DB {
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ 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->database."`";
+ $sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database);
}
if ($prefix_limit !== FALSE AND $this->dbprefix != '')
{
- return FALSE;
+ return FALSE;
}
return $sql;
@@ -581,13 +480,12 @@ class CI_DB_pdo_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access public
* @param string the table name
* @return string
*/
- function _list_columns($table = '')
+ protected function _list_columns($table = '')
{
- return 'SHOW COLUMNS FROM '.$this->_from_tables($table);
+ return 'SHOW COLUMNS FROM '.$this->escape_identifiers($table);
}
// --------------------------------------------------------------------
@@ -597,13 +495,28 @@ class CI_DB_pdo_driver extends CI_DB {
*
* Generates a platform-specific query so that the column data can be retrieved
*
- * @access public
* @param string the table name
- * @return object
+ * @return string
*/
- function _field_data($table)
+ protected function _field_data($table)
{
- return 'SELECT TOP 1 FROM '.$this->_from_tables($table);
+ if ($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($table);
}
// --------------------------------------------------------------------
@@ -638,150 +551,37 @@ class CI_DB_pdo_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
- *
- * @access private
- * @param string
- * @return string
- */
- function _escape_identifiers($item)
- {
- if ($this->_escape_char == '')
- {
- return $item;
- }
-
- foreach ($this->_reserved_identifiers as $id)
- {
- if (strpos($item, '.'.$id) !== FALSE)
- {
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
- }
-
- if (strpos($item, '.') !== FALSE)
- {
- $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
- $str .= $this->_escape_char;
- }
- else
- {
- $str = $this->_escape_char.$item.$this->_escape_char;
- }
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
-
- // --------------------------------------------------------------------
-
- /**
* From Tables
*
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
- * @access public
- * @param type
- * @return type
+ * @param array
+ * @return string
*/
- function _from_tables($tables)
+ protected function _from_tables($tables)
{
if ( ! is_array($tables))
{
$tables = array($tables);
}
- return (count($tables) == 1) ? '`'.$tables[0].'`' : '('.implode(', ', $tables).')';
+ return (count($tables) === 1) ? $tables[0] : '('.implode(', ', $tables).')';
}
// --------------------------------------------------------------------
/**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _insert($table, $keys, $values)
- {
- return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert_batch statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _insert_batch($table, $keys, $values)
- {
- return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Update statement
- *
- * Generates a platform-specific update string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
- * @return string
- */
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
- {
- foreach ($values as $key => $val)
- {
- $valstr[] = $key." = ".$val;
- }
-
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
- $orderby = (count($orderby) >= 1) ? ' ORDER BY '.implode(', ', $orderby) : '';
-
- $sql = 'UPDATE '.$this->_from_tables($table).' SET '.implode(', ', $valstr);
- $sql .= ($where != '' && count($where) >= 1) ? ' WHERE '.implode(' ', $where) : '';
- $sql .= $orderby.$limit;
-
- return $sql;
- }
-
- // --------------------------------------------------------------------
-
- /**
* Update_Batch statement
*
* Generates a platform-specific batch update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
* @return string
*/
- function _update_batch($table, $values, $index, $where = NULL)
+ protected function _update_batch($table, $values, $index, $where = NULL)
{
$ids = array();
$where = ($where != '' && count($where) >=1) ? implode(" ", $where).' AND ' : '';
@@ -799,7 +599,7 @@ class CI_DB_pdo_driver extends CI_DB {
}
}
- $sql = 'UPDATE '.$this->_from_tables($table).' SET ';
+ $sql = 'UPDATE '.$table.' SET ';
$cases = '';
foreach ($final as $k => $v)
@@ -820,58 +620,22 @@ class CI_DB_pdo_driver extends CI_DB {
return $sql;
}
-
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
- *
- * @access public
- * @param string the table name
- * @return string
- */
- function _truncate($table)
- {
- return $this->_delete($table);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete statement
*
- * Generates a platform-specific delete string from the supplied data
+ * If the database does not support the truncate() command,
+ * then this method maps to 'DELETE FROM table'
*
- * @access public
* @param string the table name
- * @param array the where clause
- * @param string the limit clause
* @return string
*/
- function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+ protected function _truncate($table)
{
- $conditions = '';
-
- if (count($where) > 0 OR count($like) > 0)
- {
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->qb_where);
-
- if (count($where) > 0 && count($like) > 0)
- {
- $conditions .= " AND ";
- }
-
- $conditions .= implode("\n", $like);
- }
-
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return 'DELETE FROM '.$this->_from_tables($table).$conditions.$limit;
+ return 'DELETE FROM '.$table;
}
// --------------------------------------------------------------------
@@ -881,13 +645,12 @@ class CI_DB_pdo_driver extends CI_DB {
*
* Generates a platform-specific LIMIT clause
*
- * @access public
* @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param int the number of rows to limit the query to
+ * @param int the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _limit($sql, $limit, $offset)
{
if ($this->pdodriver == 'cubrid' OR $this->pdodriver == 'sqlite')
{
@@ -899,7 +662,7 @@ class CI_DB_pdo_driver extends CI_DB {
{
$sql .= 'LIMIT '.$limit;
$sql .= ($offset > 0) ? ' OFFSET '.$offset : '';
-
+
return $sql;
}
}
@@ -909,13 +672,12 @@ class CI_DB_pdo_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
- * @param resource
+ * @param object
* @return void
*/
- function _close($conn_id)
+ protected function _close($conn_id)
{
- $this->conn_id = null;
+ $this->conn_id = NULL;
}
}
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-12-27 06:16:08 +0100