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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');/*** CodeIgniter** An open source application development framework for PHP 5.1.6 or newer** @package CodeIgniter* @author Esen Sagynov* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.* @license http://codeigniter.com/user_guide/license.html* @link http://codeigniter.com* @since Version 2.0.2* @filesource*/// ------------------------------------------------------------------------/*** CUBRID Database Adapter Class** Note: _DB is an extender class that the app controller* creates dynamically based on whether the active record* class is being used or not.** @package CodeIgniter* @subpackage Drivers* @category Database* @author Esen Sagynov* @link http://codeigniter.com/user_guide/database/*/class CI_DB_cubrid_driver extends CI_DB {// Default CUBRID Broker port. Will be used unless user// explicitly specifies another one.const DEFAULT_PORT = 33000;var $dbdriver = 'cubrid';// The character used for escaping - no need in CUBRIDvar $_escape_char = '';// clause and character used for LIKE escape sequences - not used in CUBRIDvar $_like_escape_str = '';var $_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 $_random_keyword = ' RAND()'; // database specific random keyword/*** Non-persistent database connection** @access private called by the base class* @return resource*/function db_connect(){// If no port is defined by the user, use the default valueif ($this->port == ''){$this->port = self::DEFAULT_PORT;}$conn = cubrid_connect($this->hostname, $this->port, $this->database, $this->username, $this->password);if ($conn){// Check if a user wants to run queries in dry, i.e. run the// queries but not commit them.if (isset($this->auto_commit) && ! $this->auto_commit){cubrid_set_autocommit($conn, CUBRID_AUTOCOMMIT_FALSE);}else{cubrid_set_autocommit($conn, CUBRID_AUTOCOMMIT_TRUE);$this->auto_commit = TRUE;}}return $conn;}// --------------------------------------------------------------------/*** Persistent database connection* In CUBRID persistent DB connection is supported natively in CUBRID* engine which can be configured in the CUBRID Broker configuration* file by setting the CCI_PCONNECT parameter to ON. In that case, all* connections established between the client application and the* server will become persistent. This is calling the same* @cubrid_connect function will establish persisten connection* considering that the CCI_PCONNECT is ON.** @access private called by the base class* @return resource*/function db_pconnect(){return $this->db_connect();}// --------------------------------------------------------------------/*** Reconnect** Keep / reestablish the db connection if no queries have been* sent for a length of time exceeding the server's idle timeout** @access public* @return void*/function reconnect(){if (cubrid_ping($this->conn_id) === FALSE){$this->conn_id = FALSE;}}// --------------------------------------------------------------------/*** Select the database** @access private called by the base class* @return resource*/function db_select(){// In CUBRID there is no need to select a database as the database// is chosen at the connection time.// So, to determine if the database is "selected", all we have to// do is ping the server and return that value.return cubrid_ping($this->conn_id);}// --------------------------------------------------------------------/*** Set client character set** @access public* @param string* @param string* @return resource*/function db_set_charset($charset, $collation){// In CUBRID, there is no need to set charset or collation.// This is why returning true will allow the application continue// its normal process.return TRUE;}// --------------------------------------------------------------------/*** Version number query string** @access public* @return string*/function _version(){// To obtain the CUBRID Server version, no need to run the SQL query.// CUBRID PHP API provides a function to determin this value.// This is why we also need to add 'cubrid' value to the list of// $driver_version_exceptions array in DB_driver class in// version() function.return cubrid_get_server_info($this->conn_id);}// --------------------------------------------------------------------/*** Execute the query** @access private called by the base class* @param string an SQL query* @return resource*/function _execute($sql){$sql = $this->_prep_query($sql);return @cubrid_query($sql, $this->conn_id);}// --------------------------------------------------------------------/*** Prep the query** If needed, each database adapter can prep the query string** @access private called by execute()* @param string an SQL query* @return string*/function _prep_query($sql){// No need to preparereturn $sql;}// --------------------------------------------------------------------/*** Begin Transaction** @access public* @return bool*/function trans_begin($test_mode = FALSE){if ( ! $this->trans_enabled){return TRUE;}// When transactions are nested we only begin/commit/rollback the outermost onesif ($this->_trans_depth > 0){return TRUE;}// 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 = ($test_mode === TRUE) ? TRUE : FALSE;if (cubrid_get_autocommit($this->conn_id)){cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_FALSE);}return TRUE;}// --------------------------------------------------------------------/*** Commit Transaction** @access public* @return bool*/function trans_commit(){if ( ! $this->trans_enabled){return TRUE;}// When transactions are nested we only begin/commit/rollback the outermost onesif ($this->_trans_depth > 0){return TRUE;}cubrid_commit($this->conn_id);if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id)){cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);}return TRUE;}// --------------------------------------------------------------------/*** Rollback Transaction** @access public* @return bool*/function trans_rollback(){if ( ! $this->trans_enabled){return TRUE;}// When transactions are nested we only begin/commit/rollback the outermost onesif ($this->_trans_depth > 0){return TRUE;}cubrid_rollback($this->conn_id);if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id)){cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);}return TRUE;}// --------------------------------------------------------------------/*** 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, $like = FALSE){if (is_array($str)){foreach ($str as $key => $val){$str[$key] = $this->escape_str($val, $like);}return $str;}if (function_exists('cubrid_real_escape_string') AND is_resource($this->conn_id)){$str = cubrid_real_escape_string($str, $this->conn_id);}else{$str = addslashes($str);}// escape LIKE condition wildcardsif ($like === TRUE){$str = str_replace(array('%', '_'), array('\\%', '\\_'), $str);}return $str;}// --------------------------------------------------------------------/*** Affected Rows** @access public* @return integer*/function affected_rows(){return @cubrid_affected_rows($this->conn_id);}// --------------------------------------------------------------------/*** Insert ID** @access public* @return integer*/function insert_id(){return @cubrid_insert_id($this->conn_id);}// --------------------------------------------------------------------/*** "Count All" query** Generates a platform-specific query string that counts all records in* the specified table** @access public* @param string* @return string*/function count_all($table = ''){if ($table == ''){return 0;}$query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));if ($query->num_rows() == 0){return 0;}$row = $query->row();$this->_reset_select();return (int) $row->numrows;}// --------------------------------------------------------------------/*** List table query** Generates a platform-specific query string so that the table names can be fetched** @access private* @param boolean* @return string*/function _list_tables($prefix_limit = FALSE){$sql = "SHOW TABLES";if ($prefix_limit !== FALSE AND $this->dbprefix != ''){$sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%'";}return $sql;}// --------------------------------------------------------------------/*** Show column query** Generates a platform-specific query string so that the column names can be fetched** @access public* @param string the table name* @return string*/function _list_columns($table = ''){return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE);}// --------------------------------------------------------------------/*** Field data query** Generates a platform-specific query so that the column data can be retrieved** @access public* @param string the table name* @return object*/function _field_data($table){return "SELECT * FROM ".$table." LIMIT 1";}// --------------------------------------------------------------------/*** The error message string** @access private* @return string*/function _error_message(){return cubrid_error($this->conn_id);}// --------------------------------------------------------------------/*** The error message number** @access private* @return integer*/function _error_number(){return cubrid_errno($this->conn_id);}// --------------------------------------------------------------------/*** 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.'.', $item);// remove duplicates if the user already included the escapereturn preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);}}if (strpos($item, '.') !== FALSE){$str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;}else{$str = $this->_escape_char.$item.$this->_escape_char;}// remove duplicates if the user already included the escapereturn preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);}// --------------------------------------------------------------------/*** From Tables** This function implicitly groups FROM tables so there is no confusion* about operator precedence in harmony with SQL standards** @access public* @param type* @return type*/function _from_tables($tables){if ( ! is_array($tables)){$tables = array($tables);}return '('.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, $values){return "INSERT INTO ".$table." (\"".implode('", "', $keys)."\") VALUES (".implode(', ', $values).")";}// --------------------------------------------------------------------/*** Replace statement** Generates a platform-specific replace string from the supplied data** @access public* @param string the table name* @param array the insert keys* @param array the insert values* @return string*/function _replace($table, $keys, $values){return "REPLACE INTO ".$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, $values){return "INSERT INTO ".$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[] = sprintf('"%s" = %s', $key, $val);}$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);$sql .= ($where != '' AND count($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, $where = NULL){$ids = array();$where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : '';foreach ($values as $key => $val){$ids[] = $val[$index];foreach (array_keys($val) as $field){if ($field != $index){$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];}}}$sql = "UPDATE ".$table." SET ";$cases = '';foreach ($final as $k => $v){$cases .= $k.' = CASE '."\n";foreach ($v as $row){$cases .= $row."\n";}$cases .= 'ELSE '.$k.' END, ';}$sql .= substr($cases, 0, -2);$sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';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 "TRUNCATE ".$table;}// --------------------------------------------------------------------/*** Delete statement** Generates a platform-specific delete string from the supplied data** @access public* @param string the table name* @param array the where clause* @param string the limit clause* @return string*/function _delete($table, $where = array(), $like = array(), $limit = FALSE){$conditions = '';if (count($where) > 0 OR count($like) > 0){$conditions = "\nWHERE ";$conditions .= implode("\n", $this->ar_where);if (count($where) > 0 && count($like) > 0){$conditions .= " AND ";}$conditions .= implode("\n", $like);}$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;return "DELETE FROM ".$table.$conditions.$limit;}// --------------------------------------------------------------------/*** Limit string** Generates a platform-specific LIMIT clause** @access public* @param string the sql query string* @param integer the number of rows to limit the query to* @param integer the offset value* @return string*/function _limit($sql, $limit, $offset){if ($offset == 0){$offset = '';}else{$offset .= ", ";}return $sql."LIMIT ".$offset.$limit;}// --------------------------------------------------------------------/*** Close DB Connection** @access public* @param resource* @return void*/function _close($conn_id){@cubrid_close($conn_id);}}/* End of file cubrid_driver.php *//* Location: ./system/database/drivers/cubrid/cubrid_driver.php */