1 | <?php |
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2 | |
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3 | /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
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4 | |
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5 | /** |
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6 | * The PEAR DB driver for PHP's ifx extension |
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7 | * for interacting with Informix databases |
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8 | * |
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9 | * PHP versions 4 and 5 |
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10 | * |
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11 | * LICENSE: This source file is subject to version 3.0 of the PHP license |
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12 | * that is available through the world-wide-web at the following URI: |
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13 | * http://www.php.net/license/3_0.txt. If you did not receive a copy of |
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14 | * the PHP License and are unable to obtain it through the web, please |
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15 | * send a note to license@php.net so we can mail you a copy immediately. |
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16 | * |
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17 | * @category Database |
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18 | * @package DB |
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19 | * @author Tomas V.V.Cox <cox@idecnet.com> |
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20 | * @author Daniel Convissor <danielc@php.net> |
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21 | * @copyright 1997-2005 The PHP Group |
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22 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
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23 | * @version CVS: $Id$ |
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24 | * @link http://pear.php.net/package/DB |
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25 | */ |
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26 | |
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27 | /** |
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28 | * Obtain the DB_common class so it can be extended from |
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29 | */ |
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30 | require_once 'DB/common.php'; |
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31 | |
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32 | /** |
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33 | * The methods PEAR DB uses to interact with PHP's ifx extension |
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34 | * for interacting with Informix databases |
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35 | * |
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36 | * These methods overload the ones declared in DB_common. |
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37 | * |
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38 | * More info on Informix errors can be found at: |
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39 | * http://www.informix.com/answers/english/ierrors.htm |
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40 | * |
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41 | * TODO: |
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42 | * - set needed env Informix vars on connect |
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43 | * - implement native prepare/execute |
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44 | * |
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45 | * @category Database |
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46 | * @package DB |
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47 | * @author Tomas V.V.Cox <cox@idecnet.com> |
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48 | * @author Daniel Convissor <danielc@php.net> |
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49 | * @copyright 1997-2005 The PHP Group |
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50 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
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51 | * @version Release: @package_version@ |
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52 | * @link http://pear.php.net/package/DB |
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53 | */ |
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54 | class DB_ifx extends DB_common |
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55 | { |
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56 | // {{{ properties |
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57 | |
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58 | /** |
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59 | * The DB driver type (mysql, oci8, odbc, etc.) |
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60 | * @var string |
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61 | */ |
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62 | var $phptype = 'ifx'; |
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63 | |
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64 | /** |
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65 | * The database syntax variant to be used (db2, access, etc.), if any |
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66 | * @var string |
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67 | */ |
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68 | var $dbsyntax = 'ifx'; |
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69 | |
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70 | /** |
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71 | * The capabilities of this DB implementation |
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72 | * |
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73 | * The 'new_link' element contains the PHP version that first provided |
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74 | * new_link support for this DBMS. Contains false if it's unsupported. |
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75 | * |
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76 | * Meaning of the 'limit' element: |
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77 | * + 'emulate' = emulate with fetch row by number |
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78 | * + 'alter' = alter the query |
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79 | * + false = skip rows |
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80 | * |
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81 | * @var array |
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82 | */ |
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83 | var $features = array( |
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84 | 'limit' => 'emulate', |
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85 | 'new_link' => false, |
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86 | 'numrows' => 'emulate', |
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87 | 'pconnect' => true, |
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88 | 'prepare' => false, |
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89 | 'ssl' => false, |
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90 | 'transactions' => true, |
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91 | ); |
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92 | |
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93 | /** |
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94 | * A mapping of native error codes to DB error codes |
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95 | * @var array |
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96 | */ |
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97 | var $errorcode_map = array( |
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98 | '-201' => DB_ERROR_SYNTAX, |
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99 | '-206' => DB_ERROR_NOSUCHTABLE, |
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100 | '-217' => DB_ERROR_NOSUCHFIELD, |
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101 | '-236' => DB_ERROR_VALUE_COUNT_ON_ROW, |
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102 | '-239' => DB_ERROR_CONSTRAINT, |
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103 | '-253' => DB_ERROR_SYNTAX, |
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104 | '-292' => DB_ERROR_CONSTRAINT_NOT_NULL, |
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105 | '-310' => DB_ERROR_ALREADY_EXISTS, |
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106 | '-316' => DB_ERROR_ALREADY_EXISTS, |
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107 | '-319' => DB_ERROR_NOT_FOUND, |
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108 | '-329' => DB_ERROR_NODBSELECTED, |
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109 | '-346' => DB_ERROR_CONSTRAINT, |
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110 | '-386' => DB_ERROR_CONSTRAINT_NOT_NULL, |
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111 | '-391' => DB_ERROR_CONSTRAINT_NOT_NULL, |
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112 | '-554' => DB_ERROR_SYNTAX, |
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113 | '-691' => DB_ERROR_CONSTRAINT, |
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114 | '-692' => DB_ERROR_CONSTRAINT, |
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115 | '-703' => DB_ERROR_CONSTRAINT_NOT_NULL, |
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116 | '-1204' => DB_ERROR_INVALID_DATE, |
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117 | '-1205' => DB_ERROR_INVALID_DATE, |
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118 | '-1206' => DB_ERROR_INVALID_DATE, |
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119 | '-1209' => DB_ERROR_INVALID_DATE, |
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120 | '-1210' => DB_ERROR_INVALID_DATE, |
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121 | '-1212' => DB_ERROR_INVALID_DATE, |
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122 | '-1213' => DB_ERROR_INVALID_NUMBER, |
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123 | ); |
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124 | |
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125 | /** |
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126 | * The raw database connection created by PHP |
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127 | * @var resource |
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128 | */ |
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129 | var $connection; |
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130 | |
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131 | /** |
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132 | * The DSN information for connecting to a database |
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133 | * @var array |
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134 | */ |
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135 | var $dsn = array(); |
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136 | |
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137 | |
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138 | /** |
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139 | * Should data manipulation queries be committed automatically? |
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140 | * @var bool |
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141 | * @access private |
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142 | */ |
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143 | var $autocommit = true; |
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144 | |
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145 | /** |
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146 | * The quantity of transactions begun |
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147 | * |
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148 | * {@internal While this is private, it can't actually be designated |
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149 | * private in PHP 5 because it is directly accessed in the test suite.}} |
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150 | * |
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151 | * @var integer |
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152 | * @access private |
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153 | */ |
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154 | var $transaction_opcount = 0; |
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155 | |
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156 | /** |
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157 | * The number of rows affected by a data manipulation query |
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158 | * @var integer |
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159 | * @access private |
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160 | */ |
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161 | var $affected = 0; |
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162 | |
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163 | |
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164 | // }}} |
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165 | // {{{ constructor |
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166 | |
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167 | /** |
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168 | * This constructor calls <kbd>$this->DB_common()</kbd> |
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169 | * |
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170 | * @return void |
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171 | */ |
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172 | function DB_ifx() |
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173 | { |
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174 | $this->DB_common(); |
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175 | } |
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176 | |
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177 | // }}} |
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178 | // {{{ connect() |
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179 | |
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180 | /** |
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181 | * Connect to the database server, log in and open the database |
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182 | * |
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183 | * Don't call this method directly. Use DB::connect() instead. |
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184 | * |
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185 | * @param array $dsn the data source name |
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186 | * @param bool $persistent should the connection be persistent? |
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187 | * |
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188 | * @return int DB_OK on success. A DB_Error object on failure. |
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189 | */ |
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190 | function connect($dsn, $persistent = false) |
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191 | { |
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192 | if (!PEAR::loadExtension('informix') && |
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193 | !PEAR::loadExtension('Informix')) |
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194 | { |
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195 | return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
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196 | } |
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197 | |
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198 | $this->dsn = $dsn; |
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199 | if ($dsn['dbsyntax']) { |
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200 | $this->dbsyntax = $dsn['dbsyntax']; |
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201 | } |
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202 | |
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203 | $dbhost = $dsn['hostspec'] ? '@' . $dsn['hostspec'] : ''; |
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204 | $dbname = $dsn['database'] ? $dsn['database'] . $dbhost : ''; |
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205 | $user = $dsn['username'] ? $dsn['username'] : ''; |
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206 | $pw = $dsn['password'] ? $dsn['password'] : ''; |
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207 | |
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208 | $connect_function = $persistent ? 'ifx_pconnect' : 'ifx_connect'; |
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209 | |
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210 | $this->connection = @$connect_function($dbname, $user, $pw); |
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211 | if (!is_resource($this->connection)) { |
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212 | return $this->ifxRaiseError(DB_ERROR_CONNECT_FAILED); |
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213 | } |
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214 | return DB_OK; |
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215 | } |
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216 | |
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217 | // }}} |
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218 | // {{{ disconnect() |
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219 | |
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220 | /** |
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221 | * Disconnects from the database server |
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222 | * |
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223 | * @return bool TRUE on success, FALSE on failure |
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224 | */ |
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225 | function disconnect() |
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226 | { |
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227 | $ret = @ifx_close($this->connection); |
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228 | $this->connection = null; |
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229 | return $ret; |
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230 | } |
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231 | |
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232 | // }}} |
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233 | // {{{ simpleQuery() |
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234 | |
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235 | /** |
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236 | * Sends a query to the database server |
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237 | * |
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238 | * @param string the SQL query string |
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239 | * |
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240 | * @return mixed + a PHP result resrouce for successful SELECT queries |
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241 | * + the DB_OK constant for other successful queries |
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242 | * + a DB_Error object on failure |
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243 | */ |
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244 | function simpleQuery($query) |
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245 | { |
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246 | $ismanip = DB::isManip($query); |
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247 | $this->last_query = $query; |
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248 | $this->affected = null; |
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249 | if (preg_match('/(SELECT)/i', $query)) { //TESTME: Use !DB::isManip()? |
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250 | // the scroll is needed for fetching absolute row numbers |
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251 | // in a select query result |
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252 | $result = @ifx_query($query, $this->connection, IFX_SCROLL); |
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253 | } else { |
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254 | if (!$this->autocommit && $ismanip) { |
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255 | if ($this->transaction_opcount == 0) { |
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256 | $result = @ifx_query('BEGIN WORK', $this->connection); |
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257 | if (!$result) { |
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258 | return $this->ifxRaiseError(); |
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259 | } |
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260 | } |
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261 | $this->transaction_opcount++; |
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262 | } |
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263 | $result = @ifx_query($query, $this->connection); |
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264 | } |
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265 | if (!$result) { |
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266 | return $this->ifxRaiseError(); |
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267 | } |
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268 | $this->affected = @ifx_affected_rows($result); |
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269 | // Determine which queries should return data, and which |
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270 | // should return an error code only. |
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271 | if (preg_match('/(SELECT)/i', $query)) { |
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272 | return $result; |
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273 | } |
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274 | // XXX Testme: free results inside a transaction |
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275 | // may cause to stop it and commit the work? |
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276 | |
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277 | // Result has to be freed even with a insert or update |
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278 | @ifx_free_result($result); |
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279 | |
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280 | return DB_OK; |
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281 | } |
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282 | |
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283 | // }}} |
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284 | // {{{ nextResult() |
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285 | |
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286 | /** |
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287 | * Move the internal ifx result pointer to the next available result |
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288 | * |
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289 | * @param a valid fbsql result resource |
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290 | * |
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291 | * @access public |
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292 | * |
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293 | * @return true if a result is available otherwise return false |
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294 | */ |
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295 | function nextResult($result) |
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296 | { |
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297 | return false; |
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298 | } |
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299 | |
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300 | // }}} |
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301 | // {{{ affectedRows() |
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302 | |
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303 | /** |
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304 | * Determines the number of rows affected by a data maniuplation query |
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305 | * |
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306 | * 0 is returned for queries that don't manipulate data. |
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307 | * |
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308 | * @return int the number of rows. A DB_Error object on failure. |
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309 | */ |
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310 | function affectedRows() |
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311 | { |
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312 | if (DB::isManip($this->last_query)) { |
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313 | return $this->affected; |
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314 | } else { |
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315 | return 0; |
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316 | } |
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317 | } |
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318 | |
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319 | // }}} |
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320 | // {{{ fetchInto() |
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321 | |
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322 | /** |
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323 | * Places a row from the result set into the given array |
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324 | * |
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325 | * Formating of the array and the data therein are configurable. |
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326 | * See DB_result::fetchInto() for more information. |
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327 | * |
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328 | * This method is not meant to be called directly. Use |
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329 | * DB_result::fetchInto() instead. It can't be declared "protected" |
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330 | * because DB_result is a separate object. |
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331 | * |
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332 | * @param resource $result the query result resource |
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333 | * @param array $arr the referenced array to put the data in |
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334 | * @param int $fetchmode how the resulting array should be indexed |
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335 | * @param int $rownum the row number to fetch (0 = first row) |
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336 | * |
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337 | * @return mixed DB_OK on success, NULL when the end of a result set is |
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338 | * reached or on failure |
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339 | * |
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340 | * @see DB_result::fetchInto() |
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341 | */ |
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342 | function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
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343 | { |
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344 | if (($rownum !== null) && ($rownum < 0)) { |
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345 | return null; |
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346 | } |
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347 | if ($rownum === null) { |
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348 | /* |
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349 | * Even though fetch_row() should return the next row if |
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350 | * $rownum is null, it doesn't in all cases. Bug 598. |
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351 | */ |
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352 | $rownum = 'NEXT'; |
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353 | } else { |
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354 | // Index starts at row 1, unlike most DBMS's starting at 0. |
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355 | $rownum++; |
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356 | } |
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357 | if (!$arr = @ifx_fetch_row($result, $rownum)) { |
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358 | return null; |
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359 | } |
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360 | if ($fetchmode !== DB_FETCHMODE_ASSOC) { |
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361 | $i=0; |
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362 | $order = array(); |
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363 | foreach ($arr as $val) { |
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364 | $order[$i++] = $val; |
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365 | } |
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366 | $arr = $order; |
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367 | } elseif ($fetchmode == DB_FETCHMODE_ASSOC && |
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368 | $this->options['portability'] & DB_PORTABILITY_LOWERCASE) |
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369 | { |
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370 | $arr = array_change_key_case($arr, CASE_LOWER); |
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371 | } |
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372 | if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
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373 | $this->_rtrimArrayValues($arr); |
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374 | } |
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375 | if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
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376 | $this->_convertNullArrayValuesToEmpty($arr); |
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377 | } |
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378 | return DB_OK; |
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379 | } |
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380 | |
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381 | // }}} |
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382 | // {{{ numCols() |
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383 | |
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384 | /** |
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385 | * Gets the number of columns in a result set |
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386 | * |
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387 | * This method is not meant to be called directly. Use |
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388 | * DB_result::numCols() instead. It can't be declared "protected" |
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389 | * because DB_result is a separate object. |
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390 | * |
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391 | * @param resource $result PHP's query result resource |
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392 | * |
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393 | * @return int the number of columns. A DB_Error object on failure. |
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394 | * |
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395 | * @see DB_result::numCols() |
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396 | */ |
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397 | function numCols($result) |
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398 | { |
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399 | if (!$cols = @ifx_num_fields($result)) { |
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400 | return $this->ifxRaiseError(); |
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401 | } |
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402 | return $cols; |
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403 | } |
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404 | |
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405 | // }}} |
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406 | // {{{ freeResult() |
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407 | |
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408 | /** |
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409 | * Deletes the result set and frees the memory occupied by the result set |
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410 | * |
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411 | * This method is not meant to be called directly. Use |
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412 | * DB_result::free() instead. It can't be declared "protected" |
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413 | * because DB_result is a separate object. |
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414 | * |
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415 | * @param resource $result PHP's query result resource |
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416 | * |
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417 | * @return bool TRUE on success, FALSE if $result is invalid |
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418 | * |
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419 | * @see DB_result::free() |
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420 | */ |
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421 | function freeResult($result) |
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422 | { |
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423 | return @ifx_free_result($result); |
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424 | } |
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425 | |
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426 | // }}} |
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427 | // {{{ autoCommit() |
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428 | |
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429 | /** |
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430 | * Enables or disables automatic commits |
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431 | * |
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432 | * @param bool $onoff true turns it on, false turns it off |
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433 | * |
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434 | * @return int DB_OK on success. A DB_Error object if the driver |
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435 | * doesn't support auto-committing transactions. |
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436 | */ |
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437 | function autoCommit($onoff = true) |
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438 | { |
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439 | // XXX if $this->transaction_opcount > 0, we should probably |
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440 | // issue a warning here. |
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441 | $this->autocommit = $onoff ? true : false; |
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442 | return DB_OK; |
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443 | } |
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444 | |
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445 | // }}} |
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446 | // {{{ commit() |
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447 | |
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448 | /** |
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449 | * Commits the current transaction |
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450 | * |
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451 | * @return int DB_OK on success. A DB_Error object on failure. |
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452 | */ |
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453 | function commit() |
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454 | { |
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455 | if ($this->transaction_opcount > 0) { |
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456 | $result = @ifx_query('COMMIT WORK', $this->connection); |
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457 | $this->transaction_opcount = 0; |
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458 | if (!$result) { |
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459 | return $this->ifxRaiseError(); |
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460 | } |
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461 | } |
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462 | return DB_OK; |
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463 | } |
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464 | |
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465 | // }}} |
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466 | // {{{ rollback() |
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467 | |
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468 | /** |
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469 | * Reverts the current transaction |
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470 | * |
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471 | * @return int DB_OK on success. A DB_Error object on failure. |
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472 | */ |
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473 | function rollback() |
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474 | { |
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475 | if ($this->transaction_opcount > 0) { |
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476 | $result = @ifx_query('ROLLBACK WORK', $this->connection); |
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477 | $this->transaction_opcount = 0; |
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478 | if (!$result) { |
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479 | return $this->ifxRaiseError(); |
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480 | } |
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481 | } |
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482 | return DB_OK; |
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483 | } |
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484 | |
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485 | // }}} |
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486 | // {{{ ifxRaiseError() |
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487 | |
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488 | /** |
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489 | * Produces a DB_Error object regarding the current problem |
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490 | * |
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491 | * @param int $errno if the error is being manually raised pass a |
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492 | * DB_ERROR* constant here. If this isn't passed |
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493 | * the error information gathered from the DBMS. |
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494 | * |
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495 | * @return object the DB_Error object |
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496 | * |
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497 | * @see DB_common::raiseError(), |
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498 | * DB_ifx::errorNative(), DB_ifx::errorCode() |
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499 | */ |
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500 | function ifxRaiseError($errno = null) |
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501 | { |
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502 | if ($errno === null) { |
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503 | $errno = $this->errorCode(ifx_error()); |
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504 | } |
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505 | return $this->raiseError($errno, null, null, null, |
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506 | $this->errorNative()); |
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507 | } |
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508 | |
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509 | // }}} |
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510 | // {{{ errorNative() |
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511 | |
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512 | /** |
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513 | * Gets the DBMS' native error code and message produced by the last query |
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514 | * |
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515 | * @return string the DBMS' error code and message |
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516 | */ |
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517 | function errorNative() |
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518 | { |
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519 | return @ifx_error() . ' ' . @ifx_errormsg(); |
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520 | } |
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521 | |
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522 | // }}} |
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523 | // {{{ errorCode() |
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524 | |
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525 | /** |
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526 | * Maps native error codes to DB's portable ones. |
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527 | * |
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528 | * Requires that the DB implementation's constructor fills |
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529 | * in the <var>$errorcode_map</var> property. |
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530 | * |
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531 | * @param string $nativecode error code returned by the database |
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532 | * @return int a portable DB error code, or DB_ERROR if this DB |
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533 | * implementation has no mapping for the given error code. |
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534 | */ |
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535 | function errorCode($nativecode) |
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536 | { |
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537 | if (ereg('SQLCODE=(.*)]', $nativecode, $match)) { |
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538 | $code = $match[1]; |
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539 | if (isset($this->errorcode_map[$code])) { |
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540 | return $this->errorcode_map[$code]; |
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541 | } |
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542 | } |
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543 | return DB_ERROR; |
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544 | } |
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545 | |
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546 | // }}} |
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547 | // {{{ tableInfo() |
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548 | |
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549 | /** |
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550 | * Returns information about a table or a result set |
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551 | * |
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552 | * NOTE: only supports 'table' if <var>$result</var> is a table name. |
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553 | * |
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554 | * If analyzing a query result and the result has duplicate field names, |
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555 | * an error will be raised saying |
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556 | * <samp>can't distinguish duplicate field names</samp>. |
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557 | * |
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558 | * @param object|string $result DB_result object from a query or a |
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559 | * string containing the name of a table. |
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560 | * While this also accepts a query result |
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561 | * resource identifier, this behavior is |
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562 | * deprecated. |
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563 | * @param int $mode a valid tableInfo mode |
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564 | * |
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565 | * @return array an associative array with the information requested. |
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566 | * A DB_Error object on failure. |
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567 | * |
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568 | * @see DB_common::tableInfo() |
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569 | * @since Method available since Release 1.6.0 |
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570 | */ |
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571 | function tableInfo($result, $mode = null) |
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572 | { |
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573 | if (is_string($result)) { |
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574 | /* |
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575 | * Probably received a table name. |
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576 | * Create a result resource identifier. |
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577 | */ |
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578 | $id = @ifx_query("SELECT * FROM $result WHERE 1=0", |
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579 | $this->connection); |
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580 | $got_string = true; |
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581 | } elseif (isset($result->result)) { |
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582 | /* |
---|
583 | * Probably received a result object. |
---|
584 | * Extract the result resource identifier. |
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585 | */ |
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586 | $id = $result->result; |
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587 | $got_string = false; |
---|
588 | } else { |
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589 | /* |
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590 | * Probably received a result resource identifier. |
---|
591 | * Copy it. |
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592 | */ |
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593 | $id = $result; |
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594 | $got_string = false; |
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595 | } |
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596 | |
---|
597 | if (!is_resource($id)) { |
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598 | return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA); |
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599 | } |
---|
600 | |
---|
601 | $flds = @ifx_fieldproperties($id); |
---|
602 | $count = @ifx_num_fields($id); |
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603 | |
---|
604 | if (count($flds) != $count) { |
---|
605 | return $this->raiseError("can't distinguish duplicate field names"); |
---|
606 | } |
---|
607 | |
---|
608 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
---|
609 | $case_func = 'strtolower'; |
---|
610 | } else { |
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611 | $case_func = 'strval'; |
---|
612 | } |
---|
613 | |
---|
614 | $i = 0; |
---|
615 | $res = array(); |
---|
616 | |
---|
617 | if ($mode) { |
---|
618 | $res['num_fields'] = $count; |
---|
619 | } |
---|
620 | |
---|
621 | foreach ($flds as $key => $value) { |
---|
622 | $props = explode(';', $value); |
---|
623 | $res[$i] = array( |
---|
624 | 'table' => $got_string ? $case_func($result) : '', |
---|
625 | 'name' => $case_func($key), |
---|
626 | 'type' => $props[0], |
---|
627 | 'len' => $props[1], |
---|
628 | 'flags' => $props[4] == 'N' ? 'not_null' : '', |
---|
629 | ); |
---|
630 | if ($mode & DB_TABLEINFO_ORDER) { |
---|
631 | $res['order'][$res[$i]['name']] = $i; |
---|
632 | } |
---|
633 | if ($mode & DB_TABLEINFO_ORDERTABLE) { |
---|
634 | $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
---|
635 | } |
---|
636 | $i++; |
---|
637 | } |
---|
638 | |
---|
639 | // free the result only if we were called on a table |
---|
640 | if ($got_string) { |
---|
641 | @ifx_free_result($id); |
---|
642 | } |
---|
643 | return $res; |
---|
644 | } |
---|
645 | |
---|
646 | // }}} |
---|
647 | // {{{ getSpecialQuery() |
---|
648 | |
---|
649 | /** |
---|
650 | * Obtains the query string needed for listing a given type of objects |
---|
651 | * |
---|
652 | * @param string $type the kind of objects you want to retrieve |
---|
653 | * |
---|
654 | * @return string the SQL query string or null if the driver doesn't |
---|
655 | * support the object type requested |
---|
656 | * |
---|
657 | * @access protected |
---|
658 | * @see DB_common::getListOf() |
---|
659 | */ |
---|
660 | function getSpecialQuery($type) |
---|
661 | { |
---|
662 | switch ($type) { |
---|
663 | case 'tables': |
---|
664 | return 'SELECT tabname FROM systables WHERE tabid >= 100'; |
---|
665 | default: |
---|
666 | return null; |
---|
667 | } |
---|
668 | } |
---|
669 | |
---|
670 | // }}} |
---|
671 | |
---|
672 | } |
---|
673 | |
---|
674 | /* |
---|
675 | * Local variables: |
---|
676 | * tab-width: 4 |
---|
677 | * c-basic-offset: 4 |
---|
678 | * End: |
---|
679 | */ |
---|
680 | |
---|
681 | ?> |
---|