system/database/drivers/mysql/mysql_utility.php

   1 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
   2 /**
   3  * CodeIgniter
   4  *
   5  * An open source application development framework for PHP 5.1.6 or newer
   6  *
   7  * @package             CodeIgniter
   8  * @author              ExpressionEngine Dev Team
   9  * @copyright   Copyright (c) 2008 - 2011, EllisLab, Inc.
  10  * @license             http://codeigniter.com/user_guide/license.html
  11  * @link                http://codeigniter.com
  12  * @since               Version 1.0
  13  * @filesource
  14  */
  15
  16 // ------------------------------------------------------------------------
  17
  18 /**
  19  * MySQL Utility Class
  20  *
  21  * @category    Database
  22  * @author              ExpressionEngine Dev Team
  23  * @link                http://codeigniter.com/user_guide/database/
  24  */
  25 class CI_DB_mysql_utility extends CI_DB_utility {
  26
  27         /**
  28          * List databases
  29          *
  30          * @access      private
  31          * @return      bool
  32          */
  33         function _list_databases()
  34         {
  35                 return "SHOW DATABASES";
  36         }
  37
  38         // --------------------------------------------------------------------
  39
  40         /**
  41          * Optimize table query
  42          *
  43          * Generates a platform-specific query so that a table can be optimized
  44          *
  45          * @access      private
  46          * @param       string  the table name
  47          * @return      object
  48          */
  49         function _optimize_table($table)
  50         {
  51                 return "OPTIMIZE TABLE ".$this->db->_escape_identifiers($table);
  52         }
  53
  54         // --------------------------------------------------------------------
  55
  56         /**
  57          * Repair table query
  58          *
  59          * Generates a platform-specific query so that a table can be repaired
  60          *
  61          * @access      private
  62          * @param       string  the table name
  63          * @return      object
  64          */
  65         function _repair_table($table)
  66         {
  67                 return "REPAIR TABLE ".$this->db->_escape_identifiers($table);
  68         }
  69
  70         // --------------------------------------------------------------------
  71         /**
  72          * MySQL Export
  73          *
  74          * @access      private
  75          * @param       array   Preferences
  76          * @return      mixed
  77          */
  78         function _backup($params = array())
  79         {
  80                 if (count($params) == 0)
  81                 {
  82                         return FALSE;
  83                 }
  84
  85                 // Extract the prefs for simplicity
  86                 extract($params);
  87
  88                 // Build the output
  89                 $output = '';
  90                 foreach ((array)$tables as $table)
  91                 {
  92                         // Is the table in the "ignore" list?
  93                         if (in_array($table, (array)$ignore, TRUE))
  94                         {
  95                                 continue;
  96                         }
  97
  98                         // Get the table schema
  99                         $query = $this->db->query("SHOW CREATE TABLE `".$this->db->database.'`.`'.$table.'`');
 100
 101                         // No result means the table name was invalid
 102                         if ($query === FALSE)
 103                         {
 104                                 continue;
 105                         }
 106
 107                         // Write out the table schema
 108                         $output .= '#'.$newline.'# TABLE STRUCTURE FOR: '.$table.$newline.'#'.$newline.$newline;
 109
 110                         if ($add_drop == TRUE)
 111                         {
 112                                 $output .= 'DROP TABLE IF EXISTS '.$table.';'.$newline.$newline;
 113                         }
 114
 115                         $i = 0;
 116                         $result = $query->result_array();
 117                         foreach ($result[0] as $val)
 118                         {
 119                                 if ($i++ % 2)
 120                                 {
 121                                         $output .= $val.';'.$newline.$newline;
 122                                 }
 123                         }
 124
 125                         // If inserts are not needed we're done...
 126                         if ($add_insert == FALSE)
 127                         {
 128                                 continue;
 129                         }
 130
 131                         // Grab all the data from the current table
 132                         $query = $this->db->query("SELECT * FROM $table");
 133
 134                         if ($query->num_rows() == 0)
 135                         {
 136                                 continue;
 137                         }
 138
 139                         // Fetch the field names and determine if the field is an
 140                         // integer type.  We use this info to decide whether to
 141                         // surround the data with quotes or not
 142
 143                         $i = 0;
 144                         $field_str = '';
 145                         $is_int = array();
 146                         while ($field = mysql_fetch_field($query->result_id))
 147                         {
 148                                 // Most versions of MySQL store timestamp as a string
 149                                 $is_int[$i] = (in_array(
 150                                                                                 strtolower(mysql_field_type($query->result_id, $i)),
 151                                                                                 array('tinyint', 'smallint', 'mediumint', 'int', 'bigint'), //, 'timestamp'),
 152                                                                                 TRUE)
 153                                                                                 ) ? TRUE : FALSE;
 154
 155                                 // Create a string of field names
 156                                 $field_str .= '`'.$field->name.'`, ';
 157                                 $i++;
 158                         }
 159
 160                         // Trim off the end comma
 161                         $field_str = preg_replace( "/, $/" , "" , $field_str);
 162
 163
 164                         // Build the insert string
 165                         foreach ($query->result_array() as $row)
 166                         {
 167                                 $val_str = '';
 168
 169                                 $i = 0;
 170                                 foreach ($row as $v)
 171                                 {
 172                                         // Is the value NULL?
 173                                         if ($v === NULL)
 174                                         {
 175                                                 $val_str .= 'NULL';
 176                                         }
 177                                         else
 178                                         {
 179                                                 // Escape the data if it's not an integer
 180                                                 if ($is_int[$i] == FALSE)
 181                                                 {
 182                                                         $val_str .= $this->db->escape($v);
 183                                                 }
 184                                                 else
 185                                                 {
 186                                                         $val_str .= $v;
 187                                                 }
 188                                         }
 189
 190                                         // Append a comma
 191                                         $val_str .= ', ';
 192                                         $i++;
 193                                 }
 194
 195                                 // Remove the comma at the end of the string
 196                                 $val_str = preg_replace( "/, $/" , "" , $val_str);
 197
 198                                 // Build the INSERT string
 199                                 $output .= 'INSERT INTO '.$table.' ('.$field_str.') VALUES ('.$val_str.');'.$newline;
 200                         }
 201
 202                         $output .= $newline.$newline;
 203                 }
 204
 205                 return $output;
 206         }
 207 }
 208
 209 /* End of file mysql_utility.php */
 210 /* Location: ./system/database/drivers/mysql/mysql_utility.php */