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<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Rick Ellis
* @copyright Copyright (c) 2006, pMachine, Inc.
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Database Utility Class
*
* @category Database
* @author Rick Ellis
* @link http://www.codeigniter.com/user_guide/database/
*/
class CI_DB_utility {
var $db;
function CI_DB_utility()
{
// Assign the main database object to $this->db
$obj =& get_instance();
$this->db =& $obj->db;
}
/**
* Database Version Number. Returns a string containing the
* version of the database being used
*
* @access public
* @return string
*/
function version()
{
if (FALSE === ($sql = $this->_version()))
{
if ($this->db->db_debug)
{
return $this->db->display_error('db_unsupported_function');
}
return FALSE;
}
if ($this->db->dbdriver == 'oci8')
{
return $sql;
}
$query = $this->db->query($sql);
$row = $query->row();
return $row->ver;
}
// --------------------------------------------------------------------
/**
* Returns an array of table names
*
* @access public
* @return array
*/
function tables()
{
if (FALSE === ($sql = $this->_show_tables()))
{
if ($this->db->db_debug)
{
return $this->db->display_error('db_unsupported_function');
}
return FALSE;
}
$retval = array();
$query = $this->db->query($sql);
if ($query->num_rows() > 0)
{
foreach($query->result_array() as $row)
{
if (isset($row['TABLE_NAME']))
{
$retval[] = $row['TABLE_NAME'];
}
else
{
$retval[] = array_shift($row);
}
}
}
return $retval;
}
// --------------------------------------------------------------------
/**
* Determine if a particular table exists
* @access public
* @return boolean
*/
function table_exists($table_name)
{
return ( ! in_array($this->db->dbprefix.$table_name, $this->tables())) ? FALSE : TRUE;
}
// --------------------------------------------------------------------
/**
* Fetch MySQL Field Names
*
* @access public
* @param string the table name
* @return array
*/
function field_names($table = '')
{
if ($table == '')
{
if ($this->db->db_debug)
{
return $this->db->display_error('db_field_param_missing');
}
return FALSE;
}
if (FALSE === ($sql = $this->_show_columns($this->db->dbprefix.$table)))
{
if ($this->db->db_debug)
{
return $this->db->display_error('db_unsupported_function');
}
return FALSE;
}
$query = $this->db->query($sql);
$retval = array();
foreach($query->result_array() as $row)
{
if (isset($row['COLUMN_NAME']))
{
$retval[] = $row['COLUMN_NAME'];
}
else
{
$retval[] = current($row);
}
}
return $retval;
}
// --------------------------------------------------------------------
/**
* Returns an object with field data
*
* @access public
* @param string the table name
* @return object
*/
function field_data($table = '')
{
if ($table == '')
{
if ($this->db->db_debug)
{
return $this->db->display_error('db_field_param_missing');
}
return FALSE;
}
return $this->_field_data($this->db->dbprefix.$table);
}
// --------------------------------------------------------------------
/**
* Primary
*
* Retrieves the primary key. It assumes that the row in the first
* position is the primary key
*
* @access public
* @param string the table name
* @return string
*/
function primary($table = '')
{
$fields = $this->field_names($table);
if ( ! is_array($fields))
{
return FALSE;
}
return current($fields);
}
function create_table()
{
}
function alter_table()
{
}
function create_index()
{
}
function drop_index()
{
}
function optimize()
{
}
}
?>
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