1 | <?php
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2 | /**
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3 | *
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4 | * @package dbal
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5 | * @version $Id$
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6 | * @copyright (c) 2005 phpBB Group
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7 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License
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8 | *
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9 | */
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10 |
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11 | /**
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12 | * @ignore
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13 | */
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14 | if (!defined('IN_PHPBB'))
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15 | {
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16 | exit;
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17 | }
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18 |
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19 | include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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20 |
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21 | /**
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22 | * MySQL4 Database Abstraction Layer
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23 | * Compatible with:
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24 | * MySQL 3.23+
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25 | * MySQL 4.0+
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26 | * MySQL 4.1+
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27 | * MySQL 5.0+
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28 | * @package dbal
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29 | */
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30 | class dbal_mysql extends dbal
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31 | {
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32 | var $multi_insert = true;
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33 |
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34 | /**
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35 | * Connect to server
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36 | * @access public
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37 | */
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38 | function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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39 | {
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40 | $this->persistency = $persistency;
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41 | $this->user = $sqluser;
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42 | $this->server = $sqlserver . (($port) ? ':' . $port : '');
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43 | $this->dbname = $database;
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44 |
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45 | $this->sql_layer = 'mysql4';
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46 |
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47 | $this->db_connect_id = ($this->persistency) ? @mysql_pconnect($this->server, $this->user, $sqlpassword) : @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
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48 |
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49 | if ($this->db_connect_id && $this->dbname != '')
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50 | {
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51 | if (@mysql_select_db($this->dbname, $this->db_connect_id))
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52 | {
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53 | // Determine what version we are using and if it natively supports UNICODE
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54 | if (version_compare($this->sql_server_info(true), '4.1.0', '>='))
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55 | {
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56 | @mysql_query("SET NAMES 'utf8'", $this->db_connect_id);
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57 |
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58 | // enforce strict mode on databases that support it
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59 | if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
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60 | {
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61 | $result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id);
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62 | $row = @mysql_fetch_assoc($result);
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63 | @mysql_free_result($result);
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64 | $modes = array_map('trim', explode(',', $row['sql_mode']));
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65 |
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66 | // TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
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67 | if (!in_array('TRADITIONAL', $modes))
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68 | {
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69 | if (!in_array('STRICT_ALL_TABLES', $modes))
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70 | {
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71 | $modes[] = 'STRICT_ALL_TABLES';
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72 | }
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73 |
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74 | if (!in_array('STRICT_TRANS_TABLES', $modes))
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75 | {
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76 | $modes[] = 'STRICT_TRANS_TABLES';
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77 | }
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78 | }
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79 |
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80 | $mode = implode(',', $modes);
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81 | @mysql_query("SET SESSION sql_mode='{$mode}'", $this->db_connect_id);
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82 | }
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83 | }
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84 | else if (version_compare($this->sql_server_info(true), '4.0.0', '<'))
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85 | {
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86 | $this->sql_layer = 'mysql';
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87 | }
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88 |
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89 | return $this->db_connect_id;
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90 | }
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91 | }
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92 |
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93 | return $this->sql_error('');
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94 | }
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95 |
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96 | /**
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97 | * Version information about used database
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98 | * @param bool $raw if true, only return the fetched sql_server_version
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99 | * @return string sql server version
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100 | */
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101 | function sql_server_info($raw = false)
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102 | {
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103 | global $cache;
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104 |
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105 | if (empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
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106 | {
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107 | $result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id);
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108 | $row = @mysql_fetch_assoc($result);
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109 | @mysql_free_result($result);
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110 |
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111 | $this->sql_server_version = $row['version'];
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112 |
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113 | if (!empty($cache))
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114 | {
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115 | $cache->put('mysql_version', $this->sql_server_version);
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116 | }
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117 | }
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118 |
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119 | return ($raw) ? $this->sql_server_version : 'MySQL ' . $this->sql_server_version;
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120 | }
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121 |
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122 | /**
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123 | * SQL Transaction
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124 | * @access private
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125 | */
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126 | function _sql_transaction($status = 'begin')
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127 | {
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128 | switch ($status)
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129 | {
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130 | case 'begin':
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131 | return @mysql_query('BEGIN', $this->db_connect_id);
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132 | break;
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133 |
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134 | case 'commit':
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135 | return @mysql_query('COMMIT', $this->db_connect_id);
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136 | break;
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137 |
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138 | case 'rollback':
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139 | return @mysql_query('ROLLBACK', $this->db_connect_id);
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140 | break;
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141 | }
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142 |
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143 | return true;
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144 | }
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145 |
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146 | /**
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147 | * Base query method
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148 | *
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149 | * @param string $query Contains the SQL query which shall be executed
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150 | * @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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151 | * @return mixed When casted to bool the returned value returns true on success and false on failure
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152 | *
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153 | * @access public
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154 | */
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155 | function sql_query($query = '', $cache_ttl = 0)
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156 | {
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157 | if ($query != '')
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158 | {
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159 | global $cache;
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160 |
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161 | // EXPLAIN only in extra debug mode
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162 | if (defined('DEBUG_EXTRA'))
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163 | {
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164 | $this->sql_report('start', $query);
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165 | }
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166 |
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167 | $this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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168 | $this->sql_add_num_queries($this->query_result);
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169 |
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170 | if ($this->query_result === false)
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171 | {
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172 | if (($this->query_result = @mysql_query($query, $this->db_connect_id)) === false)
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173 | {
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174 | $this->sql_error($query);
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175 | }
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176 |
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177 | if (defined('DEBUG_EXTRA'))
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178 | {
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179 | $this->sql_report('stop', $query);
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180 | }
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181 |
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182 | if ($cache_ttl && method_exists($cache, 'sql_save'))
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183 | {
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184 | $this->open_queries[(int) $this->query_result] = $this->query_result;
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185 | $cache->sql_save($query, $this->query_result, $cache_ttl);
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186 | }
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187 | else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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188 | {
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189 | $this->open_queries[(int) $this->query_result] = $this->query_result;
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190 | }
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191 | }
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192 | else if (defined('DEBUG_EXTRA'))
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193 | {
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194 | $this->sql_report('fromcache', $query);
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195 | }
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196 | }
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197 | else
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198 | {
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199 | return false;
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200 | }
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201 |
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202 | return $this->query_result;
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203 | }
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204 |
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205 | /**
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206 | * Build LIMIT query
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207 | */
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208 | function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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209 | {
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210 | $this->query_result = false;
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211 |
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212 | // if $total is set to 0 we do not want to limit the number of rows
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213 | if ($total == 0)
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214 | {
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215 | // Having a value of -1 was always a bug
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216 | $total = '18446744073709551615';
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217 | }
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218 |
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219 | $query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
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220 |
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221 | return $this->sql_query($query, $cache_ttl);
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222 | }
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223 |
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224 | /**
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225 | * Return number of affected rows
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226 | */
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227 | function sql_affectedrows()
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228 | {
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229 | return ($this->db_connect_id) ? @mysql_affected_rows($this->db_connect_id) : false;
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230 | }
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231 |
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232 | /**
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233 | * Fetch current row
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234 | */
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235 | function sql_fetchrow($query_id = false)
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236 | {
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237 | global $cache;
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238 |
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239 | if ($query_id === false)
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240 | {
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241 | $query_id = $this->query_result;
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242 | }
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243 |
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244 | if (isset($cache->sql_rowset[$query_id]))
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245 | {
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246 | return $cache->sql_fetchrow($query_id);
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247 | }
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248 |
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249 | return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false;
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250 | }
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251 |
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252 | /**
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253 | * Seek to given row number
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254 | * rownum is zero-based
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255 | */
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256 | function sql_rowseek($rownum, &$query_id)
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257 | {
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258 | global $cache;
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259 |
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260 | if ($query_id === false)
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261 | {
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262 | $query_id = $this->query_result;
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263 | }
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264 |
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265 | if (isset($cache->sql_rowset[$query_id]))
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266 | {
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267 | return $cache->sql_rowseek($rownum, $query_id);
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268 | }
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269 |
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270 | return ($query_id !== false) ? @mysql_data_seek($query_id, $rownum) : false;
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271 | }
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272 |
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273 | /**
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274 | * Get last inserted id after insert statement
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275 | */
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276 | function sql_nextid()
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277 | {
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278 | return ($this->db_connect_id) ? @mysql_insert_id($this->db_connect_id) : false;
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279 | }
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280 |
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281 | /**
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282 | * Free sql result
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283 | */
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284 | function sql_freeresult($query_id = false)
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285 | {
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286 | global $cache;
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287 |
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288 | if ($query_id === false)
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289 | {
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290 | $query_id = $this->query_result;
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291 | }
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292 |
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293 | if (isset($cache->sql_rowset[$query_id]))
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294 | {
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295 | return $cache->sql_freeresult($query_id);
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296 | }
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297 |
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298 | if (isset($this->open_queries[(int) $query_id]))
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299 | {
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300 | unset($this->open_queries[(int) $query_id]);
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301 | return @mysql_free_result($query_id);
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302 | }
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303 |
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304 | return false;
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305 | }
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306 |
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307 | /**
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308 | * Escape string used in sql query
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309 | */
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310 | function sql_escape($msg)
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311 | {
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312 | if (!$this->db_connect_id)
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313 | {
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314 | return @mysql_real_escape_string($msg);
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315 | }
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316 |
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317 | return @mysql_real_escape_string($msg, $this->db_connect_id);
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318 | }
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319 |
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320 | /**
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321 | * Build LIKE expression
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322 | * @access private
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323 | */
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324 | function _sql_like_expression($expression)
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325 | {
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326 | return $expression;
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327 | }
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328 |
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329 | /**
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330 | * Build db-specific query data
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331 | * @access private
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332 | */
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333 | function _sql_custom_build($stage, $data)
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334 | {
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335 | switch ($stage)
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336 | {
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337 | case 'FROM':
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338 | $data = '(' . $data . ')';
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339 | break;
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340 | }
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341 |
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342 | return $data;
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343 | }
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344 |
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345 | /**
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346 | * return sql error array
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347 | * @access private
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348 | */
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349 | function _sql_error()
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350 | {
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351 | if (!$this->db_connect_id)
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352 | {
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353 | return array(
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354 | 'message' => @mysql_error(),
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355 | 'code' => @mysql_errno()
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356 | );
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357 | }
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358 |
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359 | return array(
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360 | 'message' => @mysql_error($this->db_connect_id),
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361 | 'code' => @mysql_errno($this->db_connect_id)
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362 | );
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363 | }
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364 |
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365 | /**
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366 | * Close sql connection
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367 | * @access private
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368 | */
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369 | function _sql_close()
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370 | {
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371 | return @mysql_close($this->db_connect_id);
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372 | }
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373 |
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374 | /**
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375 | * Build db-specific report
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376 | * @access private
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377 | */
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378 | function _sql_report($mode, $query = '')
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379 | {
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380 | static $test_prof;
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381 |
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382 | // current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
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383 | if ($test_prof === null)
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384 | {
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385 | $test_prof = false;
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386 | if (version_compare($this->sql_server_info(true), '5.0.37', '>=') && version_compare($this->sql_server_info(true), '5.1', '<'))
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387 | {
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388 | $test_prof = true;
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389 | }
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390 | }
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391 |
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392 | switch ($mode)
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393 | {
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394 | case 'start':
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395 |
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396 | $explain_query = $query;
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397 | if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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398 | {
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399 | $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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400 | }
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401 | else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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402 | {
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403 | $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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404 | }
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405 |
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406 | if (preg_match('/^SELECT/', $explain_query))
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407 | {
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408 | $html_table = false;
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409 |
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410 | // begin profiling
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411 | if ($test_prof)
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412 | {
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413 | @mysql_query('SET profiling = 1;', $this->db_connect_id);
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414 | }
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415 |
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416 | if ($result = @mysql_query("EXPLAIN $explain_query", $this->db_connect_id))
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417 | {
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418 | while ($row = @mysql_fetch_assoc($result))
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419 | {
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420 | $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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421 | }
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422 | }
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423 | @mysql_free_result($result);
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424 |
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425 | if ($html_table)
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426 | {
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427 | $this->html_hold .= '</table>';
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428 | }
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429 |
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430 | if ($test_prof)
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431 | {
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432 | $html_table = false;
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433 |
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434 | // get the last profile
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435 | if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id))
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436 | {
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437 | $this->html_hold .= '<br />';
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438 | while ($row = @mysql_fetch_assoc($result))
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439 | {
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440 | // make <unknown> HTML safe
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441 | if (!empty($row['Source_function']))
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442 | {
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443 | $row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']);
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444 | }
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445 |
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446 | // remove unsupported features
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447 | foreach ($row as $key => $val)
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448 | {
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449 | if ($val === null)
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450 | {
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451 | unset($row[$key]);
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452 | }
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453 | }
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454 | $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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455 | }
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456 | }
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457 | @mysql_free_result($result);
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458 |
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459 | if ($html_table)
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460 | {
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461 | $this->html_hold .= '</table>';
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462 | }
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463 |
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464 | @mysql_query('SET profiling = 0;', $this->db_connect_id);
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465 | }
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466 | }
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467 |
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468 | break;
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469 |
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470 | case 'fromcache':
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471 | $endtime = explode(' ', microtime());
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472 | $endtime = $endtime[0] + $endtime[1];
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473 |
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474 | $result = @mysql_query($query, $this->db_connect_id);
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475 | while ($void = @mysql_fetch_assoc($result))
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476 | {
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477 | // Take the time spent on parsing rows into account
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478 | }
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479 | @mysql_free_result($result);
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480 |
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481 | $splittime = explode(' ', microtime());
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482 | $splittime = $splittime[0] + $splittime[1];
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483 |
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484 | $this->sql_report('record_fromcache', $query, $endtime, $splittime);
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485 |
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486 | break;
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487 | }
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488 | }
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489 | }
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490 |
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491 | ?>
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