diff options
Diffstat (limited to 'system/database/drivers/pdo/pdo_driver.php')
-rw-r--r-- | system/database/drivers/pdo/pdo_driver.php | 238 |
1 files changed, 97 insertions, 141 deletions
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php index 09764779a..a9bed367e 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 5.2.4 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; + 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); @@ -96,19 +94,18 @@ class CI_DB_pdo_driver extends CI_DB { $this->_like_escape_str = " ESCAPE '%s' "; $this->_like_escape_chr = '!'; } - - $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 +135,7 @@ 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($this->pdodriver, array('informix', 'mysql', 'pgsql', 'sybase', 'mssql', 'dblib', 'cubrid'))) { @@ -153,7 +150,7 @@ class CI_DB_pdo_driver extends CI_DB { } // Add the database name to the DSN, if needed - if (stripos($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.';'; @@ -190,10 +187,9 @@ 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; @@ -205,14 +201,13 @@ 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_ERRMODE] = PDO::ERRMODE_SILENT; $this->options[PDO::ATTR_PERSISTENT] = TRUE; - + return $this->pdo_connect(); } @@ -221,23 +216,22 @@ class CI_DB_pdo_driver extends CI_DB { /** * PDO connection * - * @access private called by the PDO driver class - * @return resource + * @return object */ - function pdo_connect() + public function pdo_connect() { // Refer : http://php.net/manual/en/ref.pdo-mysql.connection.php - if ($this->pdodriver == 'mysql' && is_php('5.3.6')) + if ($this->pdodriver === 'mysql' && ! is_php('5.3.6')) { $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = "SET NAMES $this->char_set COLLATE '$this->dbcollat'"; } // Connecting... - try + try { $db = new PDO($this->dsn, $this->username, $this->password, $this->options); - } - catch (PDOException $e) + } + catch (PDOException $e) { if ($this->db_debug && empty($this->failover)) { @@ -253,41 +247,6 @@ class CI_DB_pdo_driver extends CI_DB { // -------------------------------------------------------------------- /** - * Reconnect - * - * Keep / reestablish the db connection if no queries have been - * sent for a length of time exceeding the server's idle timeout - * - * @access public - * @return void - */ - function reconnect() - { - if ($this->db->db_debug) - { - return $this->db->display_error('db_unsuported_feature'); - } - - return FALSE; - } - - // -------------------------------------------------------------------- - - /** - * Select the database - * - * @access private called by the base class - * @return resource - */ - function db_select() - { - // Not needed for PDO - return TRUE; - } - - // -------------------------------------------------------------------- - - /** * Database version number * * @return string @@ -304,16 +263,15 @@ class CI_DB_pdo_driver extends CI_DB { /** * Execute the query * - * @access private called by the base class * @param string an SQL query - * @return object + * @return mixed */ - function _execute($sql) + protected 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(); @@ -322,7 +280,7 @@ class CI_DB_pdo_driver extends CI_DB { { $this->affect_rows = 0; } - + return $result_id; } @@ -333,11 +291,10 @@ class CI_DB_pdo_driver extends CI_DB { * * If needed, each database adapter can prep the query string * - * @access private called by execute() * @param string an SQL query * @return string */ - function _prep_query($sql) + protected function _prep_query($sql) { if ($this->pdodriver === 'pgsql') { @@ -358,10 +315,9 @@ 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) { @@ -387,10 +343,9 @@ 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) { @@ -404,7 +359,7 @@ class CI_DB_pdo_driver extends CI_DB { } $ret = $this->conn->commit(); - + return $ret; } @@ -413,10 +368,9 @@ class CI_DB_pdo_driver extends CI_DB { /** * Rollback Transaction * - * @access public * @return bool */ - function trans_rollback() + public function trans_rollback() { if ( ! $this->trans_enabled) { @@ -439,12 +393,11 @@ class CI_DB_pdo_driver extends CI_DB { /** * Escape String * - * @access public * @param string * @param bool whether or not the string will be used in a LIKE condition * @return string */ - function escape_str($str, $like = FALSE) + public function escape_str($str, $like = FALSE) { if (is_array($str)) { @@ -455,24 +408,22 @@ class CI_DB_pdo_driver extends CI_DB { return $str; } - + //Escape the string $str = $this->conn_id->quote($str); - + //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; @@ -483,10 +434,9 @@ class CI_DB_pdo_driver extends CI_DB { /** * Affected Rows * - * @access public - * @return integer + * @return int */ - function affected_rows() + public function affected_rows() { return $this->affect_rows; } @@ -518,11 +468,10 @@ class CI_DB_pdo_driver extends CI_DB { * Generates a platform-specific query string that counts all records in * the specified database * - * @access public * @param string * @return string */ - function count_all($table = '') + public function count_all($table = '') { if ($table == '') { @@ -550,17 +499,21 @@ 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."`"; @@ -568,7 +521,7 @@ class CI_DB_pdo_driver extends CI_DB { if ($prefix_limit !== FALSE AND $this->dbprefix != '') { - return FALSE; + return FALSE; } return $sql; @@ -581,11 +534,10 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific query string so that the column names can be fetched * - * @access public * @param string the table name * @return string */ - function _list_columns($table = '') + protected function _list_columns($table = '') { return 'SHOW COLUMNS FROM '.$this->_from_tables($table); } @@ -597,12 +549,27 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific query so that the column data can be retrieved * - * @access public * @param string the table name - * @return object + * @return string */ - function _field_data($table) + protected function _field_data($table) { + if ($this->pdodriver == 'mysql' or $this->pdodriver == 'pgsql') + { + // Analog function for mysql and postgre + return 'SELECT * FROM '.$this->_from_tables($table).' LIMIT 1'; + } + elseif ($this->pdodriver == 'oci') + { + // Analog function for oci + return 'SELECT * FROM '.$this->_from_tables($table).' WHERE ROWNUM <= 1'; + } + elseif ($this->pdodriver == 'sqlite') + { + // Analog function for sqlite + return 'PRAGMA table_info('.$this->_from_tables($table).')'; + } + return 'SELECT TOP 1 FROM '.$this->_from_tables($table); } @@ -642,11 +609,10 @@ class CI_DB_pdo_driver extends CI_DB { * * This function escapes column and table names * - * @access private * @param string * @return string */ - function _escape_identifiers($item) + public function _escape_identifiers($item) { if ($this->_escape_char == '') { @@ -686,11 +652,10 @@ class CI_DB_pdo_driver extends CI_DB { * 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($tables)) { @@ -707,17 +672,16 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific insert string from the supplied data * - * @access public * @param string the table name * @param array the insert keys * @param array the insert values * @return string */ - function _insert($table, $keys, $values) + protected function _insert($table, $keys, $values) { return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')'; } - + // -------------------------------------------------------------------- /** @@ -725,13 +689,12 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific insert string from the supplied data * - * @access public - * @param string the table name - * @param array the insert keys - * @param array the insert values - * @return string + * @param string the table name + * @param array the insert keys + * @param array the insert values + * @return string */ - function _insert_batch($table, $keys, $values) + protected function _insert_batch($table, $keys, $values) { return 'INSERT INTO '.$this->_from_tables($table).' ('.implode(', ', $keys).') VALUES '.implode(', ', $values); } @@ -743,7 +706,6 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific update string from the supplied data * - * @access public * @param string the table name * @param array the update data * @param array the where clause @@ -751,7 +713,7 @@ class CI_DB_pdo_driver extends CI_DB { * @param array the limit clause * @return string */ - function _update($table, $values, $where, $orderby = array(), $limit = FALSE) + protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE) { foreach ($values as $key => $val) { @@ -767,7 +729,7 @@ class CI_DB_pdo_driver extends CI_DB { return $sql; } - + // -------------------------------------------------------------------- /** @@ -775,13 +737,12 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific batch update string from the supplied data * - * @access public * @param string the table name * @param array the update data * @param array the where clause * @return string */ - function _update_batch($table, $values, $index, $where = NULL) + protected function _update_batch($table, $values, $index, $where = NULL) { $ids = array(); $where = ($where != '' && count($where) >=1) ? implode(" ", $where).' AND ' : ''; @@ -820,7 +781,6 @@ class CI_DB_pdo_driver extends CI_DB { return $sql; } - // -------------------------------------------------------------------- /** @@ -830,11 +790,10 @@ class CI_DB_pdo_driver extends CI_DB { * If the database does not support the truncate() command * This function maps to "DELETE FROM table" * - * @access public * @param string the table name * @return string */ - function _truncate($table) + protected function _truncate($table) { return $this->_delete($table); } @@ -846,13 +805,12 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific delete string from the supplied data * - * @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(), $limit = FALSE) + protected function _delete($table, $where = array(), $like = array(), $limit = FALSE) { $conditions = ''; @@ -881,13 +839,12 @@ class CI_DB_pdo_driver extends CI_DB { * * Generates a platform-specific LIMIT clause * - * @access public * @param string the sql query string - * @param integer the number of rows to limit the query to - * @param integer the offset value + * @param int the number of rows to limit the query to + * @param int the offset value * @return string */ - function _limit($sql, $limit, $offset) + protected function _limit($sql, $limit, $offset) { if ($this->pdodriver == 'cubrid' OR $this->pdodriver == 'sqlite') { @@ -899,7 +856,7 @@ class CI_DB_pdo_driver extends CI_DB { { $sql .= 'LIMIT '.$limit; $sql .= ($offset > 0) ? ' OFFSET '.$offset : ''; - + return $sql; } } @@ -909,11 +866,10 @@ class CI_DB_pdo_driver extends CI_DB { /** * Close DB Connection * - * @access public * @param resource * @return void */ - function _close($conn_id) + protected function _close($conn_id) { $this->conn_id = null; } @@ -921,4 +877,4 @@ class CI_DB_pdo_driver extends CI_DB { } /* End of file pdo_driver.php */ -/* Location: ./system/database/drivers/pdo/pdo_driver.php */ +/* Location: ./system/database/drivers/pdo/pdo_driver.php */
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