210 lines
No EOL
4.5 KiB
PHP
210 lines
No EOL
4.5 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* MySQL Utility Class
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*
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* @category Database
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/database/
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*/
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class CI_DB_mysql_utility extends CI_DB_utility {
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/**
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* List databases
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*
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* @access private
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* @return bool
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*/
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function _list_databases()
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{
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return "SHOW DATABASES";
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}
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// --------------------------------------------------------------------
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/**
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* Optimize table query
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*
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* Generates a platform-specific query so that a table can be optimized
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*
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* @access private
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* @param string the table name
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* @return object
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*/
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function _optimize_table($table)
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{
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return "OPTIMIZE TABLE ".$this->db->_escape_identifiers($table);
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}
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// --------------------------------------------------------------------
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/**
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* Repair table query
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*
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* Generates a platform-specific query so that a table can be repaired
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*
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* @access private
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* @param string the table name
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* @return object
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*/
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function _repair_table($table)
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{
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return "REPAIR TABLE ".$this->db->_escape_identifiers($table);
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}
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// --------------------------------------------------------------------
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/**
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* MySQL Export
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*
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* @access private
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* @param array Preferences
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* @return mixed
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*/
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function _backup($params = array())
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{
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if (count($params) == 0)
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{
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return FALSE;
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}
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// Extract the prefs for simplicity
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extract($params);
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// Build the output
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$output = '';
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foreach ((array)$tables as $table)
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{
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// Is the table in the "ignore" list?
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if (in_array($table, (array)$ignore, TRUE))
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{
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continue;
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}
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// Get the table schema
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$query = $this->db->query("SHOW CREATE TABLE `".$this->db->database.'`.'.$table);
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// No result means the table name was invalid
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if ($query === FALSE)
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{
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continue;
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}
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// Write out the table schema
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$output .= '#'.$newline.'# TABLE STRUCTURE FOR: '.$table.$newline.'#'.$newline.$newline;
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if ($add_drop == TRUE)
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{
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$output .= 'DROP TABLE IF EXISTS '.$table.';'.$newline.$newline;
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}
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$i = 0;
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$result = $query->result_array();
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foreach ($result[0] as $val)
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{
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if ($i++ % 2)
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{
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$output .= $val.';'.$newline.$newline;
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}
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}
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// If inserts are not needed we're done...
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if ($add_insert == FALSE)
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{
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continue;
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}
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// Grab all the data from the current table
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$query = $this->db->query("SELECT * FROM $table");
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if ($query->num_rows() == 0)
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{
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continue;
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}
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// Fetch the field names and determine if the field is an
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// integer type. We use this info to decide whether to
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// surround the data with quotes or not
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$i = 0;
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$field_str = '';
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$is_int = array();
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while ($field = mysql_fetch_field($query->result_id))
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{
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// Most versions of MySQL store timestamp as a string
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$is_int[$i] = (in_array(
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strtolower(mysql_field_type($query->result_id, $i)),
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array('tinyint', 'smallint', 'mediumint', 'int', 'bigint'), //, 'timestamp'),
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TRUE)
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) ? TRUE : FALSE;
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// Create a string of field names
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$field_str .= '`'.$field->name.'`, ';
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$i++;
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}
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// Trim off the end comma
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$field_str = preg_replace( "/, $/" , "" , $field_str);
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// Build the insert string
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foreach ($query->result_array() as $row)
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{
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$val_str = '';
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$i = 0;
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foreach ($row as $v)
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{
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// Is the value NULL?
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if ($v === NULL)
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{
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$val_str .= 'NULL';
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}
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else
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{
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// Escape the data if it's not an integer
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if ($is_int[$i] == FALSE)
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{
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$val_str .= $this->db->escape($v);
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}
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else
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{
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$val_str .= $v;
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}
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}
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// Append a comma
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$val_str .= ', ';
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$i++;
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}
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// Remove the comma at the end of the string
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$val_str = preg_replace( "/, $/" , "" , $val_str);
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// Build the INSERT string
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$output .= 'INSERT INTO '.$table.' ('.$field_str.') VALUES ('.$val_str.');'.$newline;
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}
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$output .= $newline.$newline;
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}
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return $output;
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}
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}
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/* End of file mysql_utility.php */
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/* Location: ./system/database/drivers/mysql/mysql_utility.php */ |