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 mssql extension |
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7 | * for interacting with Microsoft SQL Server 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 Sterling Hughes <sterling@php.net> |
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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: mssql.php 3 2006-08-23 03:04:20Z naka $ |
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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 mssql extension |
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34 | * for interacting with Microsoft SQL Server 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 | * @category Database |
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39 | * @package DB |
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40 | * @author Sterling Hughes <sterling@php.net> |
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41 | * @author Daniel Convissor <danielc@php.net> |
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42 | * @copyright 1997-2005 The PHP Group |
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43 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
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44 | * @version Release: @package_version@ |
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45 | * @link http://pear.php.net/package/DB |
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46 | */ |
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47 | class DB_mssql extends DB_common |
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48 | { |
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49 | // {{{ properties |
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50 | |
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51 | /** |
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52 | * The DB driver type (mysql, oci8, odbc, etc.) |
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53 | * @var string |
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54 | */ |
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55 | var $phptype = 'mssql'; |
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56 | |
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57 | /** |
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58 | * The database syntax variant to be used (db2, access, etc.), if any |
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59 | * @var string |
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60 | */ |
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61 | var $dbsyntax = 'mssql'; |
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62 | |
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63 | /** |
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64 | * The capabilities of this DB implementation |
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65 | * |
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66 | * The 'new_link' element contains the PHP version that first provided |
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67 | * new_link support for this DBMS. Contains false if it's unsupported. |
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68 | * |
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69 | * Meaning of the 'limit' element: |
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70 | * + 'emulate' = emulate with fetch row by number |
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71 | * + 'alter' = alter the query |
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72 | * + false = skip rows |
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73 | * |
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74 | * @var array |
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75 | */ |
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76 | var $features = array( |
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77 | 'limit' => 'emulate', |
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78 | 'new_link' => false, |
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79 | 'numrows' => true, |
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80 | 'pconnect' => true, |
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81 | 'prepare' => false, |
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82 | 'ssl' => false, |
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83 | 'transactions' => true, |
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84 | ); |
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85 | |
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86 | /** |
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87 | * A mapping of native error codes to DB error codes |
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88 | * @var array |
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89 | */ |
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90 | // XXX Add here error codes ie: 'S100E' => DB_ERROR_SYNTAX |
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91 | var $errorcode_map = array( |
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92 | 110 => DB_ERROR_VALUE_COUNT_ON_ROW, |
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93 | 155 => DB_ERROR_NOSUCHFIELD, |
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94 | 170 => DB_ERROR_SYNTAX, |
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95 | 207 => DB_ERROR_NOSUCHFIELD, |
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96 | 208 => DB_ERROR_NOSUCHTABLE, |
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97 | 245 => DB_ERROR_INVALID_NUMBER, |
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98 | 515 => DB_ERROR_CONSTRAINT_NOT_NULL, |
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99 | 547 => DB_ERROR_CONSTRAINT, |
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100 | 1913 => DB_ERROR_ALREADY_EXISTS, |
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101 | 2627 => DB_ERROR_CONSTRAINT, |
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102 | 2714 => DB_ERROR_ALREADY_EXISTS, |
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103 | 3701 => DB_ERROR_NOSUCHTABLE, |
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104 | 8134 => DB_ERROR_DIVZERO, |
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105 | ); |
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106 | |
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107 | /** |
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108 | * The raw database connection created by PHP |
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109 | * @var resource |
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110 | */ |
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111 | var $connection; |
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112 | |
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113 | /** |
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114 | * The DSN information for connecting to a database |
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115 | * @var array |
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116 | */ |
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117 | var $dsn = array(); |
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118 | |
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119 | |
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120 | /** |
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121 | * Should data manipulation queries be committed automatically? |
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122 | * @var bool |
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123 | * @access private |
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124 | */ |
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125 | var $autocommit = true; |
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126 | |
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127 | /** |
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128 | * The quantity of transactions begun |
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129 | * |
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130 | * {@internal While this is private, it can't actually be designated |
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131 | * private in PHP 5 because it is directly accessed in the test suite.}} |
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132 | * |
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133 | * @var integer |
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134 | * @access private |
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135 | */ |
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136 | var $transaction_opcount = 0; |
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137 | |
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138 | /** |
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139 | * The database specified in the DSN |
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140 | * |
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141 | * It's a fix to allow calls to different databases in the same script. |
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142 | * |
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143 | * @var string |
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144 | * @access private |
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145 | */ |
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146 | var $_db = null; |
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147 | |
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148 | |
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149 | // }}} |
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150 | // {{{ constructor |
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151 | |
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152 | /** |
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153 | * This constructor calls <kbd>$this->DB_common()</kbd> |
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154 | * |
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155 | * @return void |
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156 | */ |
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157 | function DB_mssql() |
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158 | { |
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159 | $this->DB_common(); |
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160 | } |
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161 | |
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162 | // }}} |
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163 | // {{{ connect() |
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164 | |
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165 | /** |
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166 | * Connect to the database server, log in and open the database |
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167 | * |
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168 | * Don't call this method directly. Use DB::connect() instead. |
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169 | * |
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170 | * @param array $dsn the data source name |
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171 | * @param bool $persistent should the connection be persistent? |
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172 | * |
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173 | * @return int DB_OK on success. A DB_Error object on failure. |
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174 | */ |
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175 | function connect($dsn, $persistent = false) |
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176 | { |
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177 | if (!PEAR::loadExtension('mssql') && !PEAR::loadExtension('sybase') |
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178 | && !PEAR::loadExtension('sybase_ct')) |
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179 | { |
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180 | return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
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181 | } |
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182 | |
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183 | $this->dsn = $dsn; |
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184 | if ($dsn['dbsyntax']) { |
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185 | $this->dbsyntax = $dsn['dbsyntax']; |
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186 | } |
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187 | |
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188 | $params = array( |
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189 | $dsn['hostspec'] ? $dsn['hostspec'] : 'localhost', |
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190 | $dsn['username'] ? $dsn['username'] : null, |
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191 | $dsn['password'] ? $dsn['password'] : null, |
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192 | ); |
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193 | if ($dsn['port']) { |
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194 | $params[0] .= ((substr(PHP_OS, 0, 3) == 'WIN') ? ',' : ':') |
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195 | . $dsn['port']; |
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196 | } |
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197 | |
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198 | $connect_function = $persistent ? 'mssql_pconnect' : 'mssql_connect'; |
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199 | |
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200 | $this->connection = @call_user_func_array($connect_function, $params); |
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201 | |
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202 | if (!$this->connection) { |
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203 | return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
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204 | null, null, null, |
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205 | @mssql_get_last_message()); |
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206 | } |
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207 | if ($dsn['database']) { |
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208 | if (!@mssql_select_db($dsn['database'], $this->connection)) { |
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209 | return $this->raiseError(DB_ERROR_NODBSELECTED, |
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210 | null, null, null, |
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211 | @mssql_get_last_message()); |
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212 | } |
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213 | $this->_db = $dsn['database']; |
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214 | } |
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215 | return DB_OK; |
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216 | } |
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217 | |
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218 | // }}} |
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219 | // {{{ disconnect() |
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220 | |
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221 | /** |
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222 | * Disconnects from the database server |
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223 | * |
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224 | * @return bool TRUE on success, FALSE on failure |
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225 | */ |
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226 | function disconnect() |
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227 | { |
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228 | $ret = @mssql_close($this->connection); |
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229 | $this->connection = null; |
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230 | return $ret; |
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231 | } |
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232 | |
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233 | // }}} |
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234 | // {{{ simpleQuery() |
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235 | |
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236 | /** |
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237 | * Sends a query to the database server |
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238 | * |
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239 | * @param string the SQL query string |
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240 | * |
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241 | * @return mixed + a PHP result resrouce for successful SELECT queries |
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242 | * + the DB_OK constant for other successful queries |
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243 | * + a DB_Error object on failure |
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244 | */ |
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245 | function simpleQuery($query) |
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246 | { |
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247 | $ismanip = DB::isManip($query); |
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248 | $this->last_query = $query; |
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249 | if (!@mssql_select_db($this->_db, $this->connection)) { |
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250 | return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED); |
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251 | } |
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252 | $query = $this->modifyQuery($query); |
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253 | if (!$this->autocommit && $ismanip) { |
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254 | if ($this->transaction_opcount == 0) { |
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255 | $result = @mssql_query('BEGIN TRAN', $this->connection); |
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256 | if (!$result) { |
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257 | return $this->mssqlRaiseError(); |
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258 | } |
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259 | } |
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260 | $this->transaction_opcount++; |
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261 | } |
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262 | $result = @mssql_query($query, $this->connection); |
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263 | if (!$result) { |
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264 | return $this->mssqlRaiseError(); |
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265 | } |
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266 | // Determine which queries that should return data, and which |
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267 | // should return an error code only. |
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268 | return $ismanip ? DB_OK : $result; |
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269 | } |
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270 | |
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271 | // }}} |
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272 | // {{{ nextResult() |
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273 | |
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274 | /** |
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275 | * Move the internal mssql result pointer to the next available result |
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276 | * |
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277 | * @param a valid fbsql result resource |
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278 | * |
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279 | * @access public |
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280 | * |
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281 | * @return true if a result is available otherwise return false |
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282 | */ |
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283 | function nextResult($result) |
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284 | { |
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285 | return @mssql_next_result($result); |
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286 | } |
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287 | |
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288 | // }}} |
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289 | // {{{ fetchInto() |
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290 | |
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291 | /** |
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292 | * Places a row from the result set into the given array |
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293 | * |
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294 | * Formating of the array and the data therein are configurable. |
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295 | * See DB_result::fetchInto() for more information. |
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296 | * |
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297 | * This method is not meant to be called directly. Use |
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298 | * DB_result::fetchInto() instead. It can't be declared "protected" |
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299 | * because DB_result is a separate object. |
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300 | * |
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301 | * @param resource $result the query result resource |
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302 | * @param array $arr the referenced array to put the data in |
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303 | * @param int $fetchmode how the resulting array should be indexed |
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304 | * @param int $rownum the row number to fetch (0 = first row) |
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305 | * |
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306 | * @return mixed DB_OK on success, NULL when the end of a result set is |
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307 | * reached or on failure |
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308 | * |
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309 | * @see DB_result::fetchInto() |
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310 | */ |
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311 | function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
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312 | { |
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313 | if ($rownum !== null) { |
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314 | if (!@mssql_data_seek($result, $rownum)) { |
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315 | return null; |
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316 | } |
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317 | } |
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318 | if ($fetchmode & DB_FETCHMODE_ASSOC) { |
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319 | $arr = @mssql_fetch_array($result, MSSQL_ASSOC); |
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320 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
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321 | $arr = array_change_key_case($arr, CASE_LOWER); |
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322 | } |
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323 | } else { |
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324 | $arr = @mssql_fetch_row($result); |
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325 | } |
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326 | if (!$arr) { |
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327 | return null; |
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328 | } |
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329 | if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
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330 | $this->_rtrimArrayValues($arr); |
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331 | } |
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332 | if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
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333 | $this->_convertNullArrayValuesToEmpty($arr); |
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334 | } |
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335 | return DB_OK; |
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336 | } |
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337 | |
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338 | // }}} |
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339 | // {{{ freeResult() |
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340 | |
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341 | /** |
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342 | * Deletes the result set and frees the memory occupied by the result set |
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343 | * |
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344 | * This method is not meant to be called directly. Use |
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345 | * DB_result::free() instead. It can't be declared "protected" |
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346 | * because DB_result is a separate object. |
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347 | * |
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348 | * @param resource $result PHP's query result resource |
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349 | * |
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350 | * @return bool TRUE on success, FALSE if $result is invalid |
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351 | * |
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352 | * @see DB_result::free() |
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353 | */ |
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354 | function freeResult($result) |
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355 | { |
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356 | return @mssql_free_result($result); |
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357 | } |
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358 | |
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359 | // }}} |
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360 | // {{{ numCols() |
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361 | |
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362 | /** |
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363 | * Gets the number of columns in a result set |
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364 | * |
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365 | * This method is not meant to be called directly. Use |
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366 | * DB_result::numCols() instead. It can't be declared "protected" |
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367 | * because DB_result is a separate object. |
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368 | * |
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369 | * @param resource $result PHP's query result resource |
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370 | * |
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371 | * @return int the number of columns. A DB_Error object on failure. |
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372 | * |
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373 | * @see DB_result::numCols() |
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374 | */ |
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375 | function numCols($result) |
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376 | { |
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377 | $cols = @mssql_num_fields($result); |
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378 | if (!$cols) { |
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379 | return $this->mssqlRaiseError(); |
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380 | } |
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381 | return $cols; |
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382 | } |
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383 | |
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384 | // }}} |
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385 | // {{{ numRows() |
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386 | |
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387 | /** |
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388 | * Gets the number of rows in a result set |
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389 | * |
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390 | * This method is not meant to be called directly. Use |
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391 | * DB_result::numRows() instead. It can't be declared "protected" |
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392 | * because DB_result is a separate object. |
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393 | * |
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394 | * @param resource $result PHP's query result resource |
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395 | * |
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396 | * @return int the number of rows. A DB_Error object on failure. |
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397 | * |
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398 | * @see DB_result::numRows() |
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399 | */ |
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400 | function numRows($result) |
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401 | { |
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402 | $rows = @mssql_num_rows($result); |
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403 | if ($rows === false) { |
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404 | return $this->mssqlRaiseError(); |
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405 | } |
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406 | return $rows; |
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407 | } |
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408 | |
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409 | // }}} |
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410 | // {{{ autoCommit() |
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411 | |
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412 | /** |
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413 | * Enables or disables automatic commits |
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414 | * |
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415 | * @param bool $onoff true turns it on, false turns it off |
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416 | * |
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417 | * @return int DB_OK on success. A DB_Error object if the driver |
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418 | * doesn't support auto-committing transactions. |
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419 | */ |
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420 | function autoCommit($onoff = false) |
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421 | { |
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422 | // XXX if $this->transaction_opcount > 0, we should probably |
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423 | // issue a warning here. |
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424 | $this->autocommit = $onoff ? true : false; |
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425 | return DB_OK; |
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426 | } |
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427 | |
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428 | // }}} |
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429 | // {{{ commit() |
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430 | |
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431 | /** |
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432 | * Commits the current transaction |
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433 | * |
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434 | * @return int DB_OK on success. A DB_Error object on failure. |
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435 | */ |
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436 | function commit() |
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437 | { |
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438 | if ($this->transaction_opcount > 0) { |
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439 | if (!@mssql_select_db($this->_db, $this->connection)) { |
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440 | return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED); |
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441 | } |
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442 | $result = @mssql_query('COMMIT TRAN', $this->connection); |
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443 | $this->transaction_opcount = 0; |
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444 | if (!$result) { |
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445 | return $this->mssqlRaiseError(); |
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446 | } |
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447 | } |
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448 | return DB_OK; |
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449 | } |
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450 | |
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451 | // }}} |
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452 | // {{{ rollback() |
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453 | |
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454 | /** |
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455 | * Reverts the current transaction |
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456 | * |
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457 | * @return int DB_OK on success. A DB_Error object on failure. |
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458 | */ |
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459 | function rollback() |
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460 | { |
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461 | if ($this->transaction_opcount > 0) { |
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462 | if (!@mssql_select_db($this->_db, $this->connection)) { |
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463 | return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED); |
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464 | } |
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465 | $result = @mssql_query('ROLLBACK TRAN', $this->connection); |
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466 | $this->transaction_opcount = 0; |
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467 | if (!$result) { |
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468 | return $this->mssqlRaiseError(); |
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469 | } |
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470 | } |
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471 | return DB_OK; |
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472 | } |
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473 | |
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474 | // }}} |
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475 | // {{{ affectedRows() |
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476 | |
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477 | /** |
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478 | * Determines the number of rows affected by a data maniuplation query |
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479 | * |
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480 | * 0 is returned for queries that don't manipulate data. |
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481 | * |
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482 | * @return int the number of rows. A DB_Error object on failure. |
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483 | */ |
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484 | function affectedRows() |
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485 | { |
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486 | if (DB::isManip($this->last_query)) { |
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487 | $res = @mssql_query('select @@rowcount', $this->connection); |
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488 | if (!$res) { |
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489 | return $this->mssqlRaiseError(); |
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490 | } |
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491 | $ar = @mssql_fetch_row($res); |
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492 | if (!$ar) { |
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493 | $result = 0; |
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494 | } else { |
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495 | @mssql_free_result($res); |
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496 | $result = $ar[0]; |
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497 | } |
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498 | } else { |
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499 | $result = 0; |
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500 | } |
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501 | return $result; |
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502 | } |
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503 | |
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504 | // }}} |
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505 | // {{{ nextId() |
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506 | |
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507 | /** |
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508 | * Returns the next free id in a sequence |
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509 | * |
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510 | * @param string $seq_name name of the sequence |
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511 | * @param boolean $ondemand when true, the seqence is automatically |
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512 | * created if it does not exist |
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513 | * |
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514 | * @return int the next id number in the sequence. |
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515 | * A DB_Error object on failure. |
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516 | * |
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517 | * @see DB_common::nextID(), DB_common::getSequenceName(), |
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518 | * DB_mssql::createSequence(), DB_mssql::dropSequence() |
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519 | */ |
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520 | function nextId($seq_name, $ondemand = true) |
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521 | { |
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522 | $seqname = $this->getSequenceName($seq_name); |
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523 | if (!@mssql_select_db($this->_db, $this->connection)) { |
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524 | return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED); |
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525 | } |
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526 | $repeat = 0; |
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527 | do { |
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528 | $this->pushErrorHandling(PEAR_ERROR_RETURN); |
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529 | $result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)"); |
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530 | $this->popErrorHandling(); |
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531 | if ($ondemand && DB::isError($result) && |
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532 | ($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE)) |
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533 | { |
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534 | $repeat = 1; |
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535 | $result = $this->createSequence($seq_name); |
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536 | if (DB::isError($result)) { |
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537 | return $this->raiseError($result); |
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538 | } |
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539 | } elseif (!DB::isError($result)) { |
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540 | $result =& $this->query("SELECT @@IDENTITY FROM $seqname"); |
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541 | $repeat = 0; |
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542 | } else { |
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543 | $repeat = false; |
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544 | } |
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545 | } while ($repeat); |
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546 | if (DB::isError($result)) { |
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547 | return $this->raiseError($result); |
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548 | } |
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549 | $result = $result->fetchRow(DB_FETCHMODE_ORDERED); |
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550 | return $result[0]; |
---|
551 | } |
---|
552 | |
---|
553 | /** |
---|
554 | * Creates a new sequence |
---|
555 | * |
---|
556 | * @param string $seq_name name of the new sequence |
---|
557 | * |
---|
558 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
559 | * |
---|
560 | * @see DB_common::createSequence(), DB_common::getSequenceName(), |
---|
561 | * DB_mssql::nextID(), DB_mssql::dropSequence() |
---|
562 | */ |
---|
563 | function createSequence($seq_name) |
---|
564 | { |
---|
565 | return $this->query('CREATE TABLE ' |
---|
566 | . $this->getSequenceName($seq_name) |
---|
567 | . ' ([id] [int] IDENTITY (1, 1) NOT NULL,' |
---|
568 | . ' [vapor] [int] NULL)'); |
---|
569 | } |
---|
570 | |
---|
571 | // }}} |
---|
572 | // {{{ dropSequence() |
---|
573 | |
---|
574 | /** |
---|
575 | * Deletes a sequence |
---|
576 | * |
---|
577 | * @param string $seq_name name of the sequence to be deleted |
---|
578 | * |
---|
579 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
580 | * |
---|
581 | * @see DB_common::dropSequence(), DB_common::getSequenceName(), |
---|
582 | * DB_mssql::nextID(), DB_mssql::createSequence() |
---|
583 | */ |
---|
584 | function dropSequence($seq_name) |
---|
585 | { |
---|
586 | return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)); |
---|
587 | } |
---|
588 | |
---|
589 | // }}} |
---|
590 | // {{{ quoteIdentifier() |
---|
591 | |
---|
592 | /** |
---|
593 | * Quotes a string so it can be safely used as a table or column name |
---|
594 | * |
---|
595 | * @param string $str identifier name to be quoted |
---|
596 | * |
---|
597 | * @return string quoted identifier string |
---|
598 | * |
---|
599 | * @see DB_common::quoteIdentifier() |
---|
600 | * @since Method available since Release 1.6.0 |
---|
601 | */ |
---|
602 | function quoteIdentifier($str) |
---|
603 | { |
---|
604 | return '[' . str_replace(']', ']]', $str) . ']'; |
---|
605 | } |
---|
606 | |
---|
607 | // }}} |
---|
608 | // {{{ mssqlRaiseError() |
---|
609 | |
---|
610 | /** |
---|
611 | * Produces a DB_Error object regarding the current problem |
---|
612 | * |
---|
613 | * @param int $errno if the error is being manually raised pass a |
---|
614 | * DB_ERROR* constant here. If this isn't passed |
---|
615 | * the error information gathered from the DBMS. |
---|
616 | * |
---|
617 | * @return object the DB_Error object |
---|
618 | * |
---|
619 | * @see DB_common::raiseError(), |
---|
620 | * DB_mssql::errorNative(), DB_mssql::errorCode() |
---|
621 | */ |
---|
622 | function mssqlRaiseError($code = null) |
---|
623 | { |
---|
624 | $message = @mssql_get_last_message(); |
---|
625 | if (!$code) { |
---|
626 | $code = $this->errorNative(); |
---|
627 | } |
---|
628 | return $this->raiseError($this->errorCode($code, $message), |
---|
629 | null, null, null, "$code - $message"); |
---|
630 | } |
---|
631 | |
---|
632 | // }}} |
---|
633 | // {{{ errorNative() |
---|
634 | |
---|
635 | /** |
---|
636 | * Gets the DBMS' native error code produced by the last query |
---|
637 | * |
---|
638 | * @return int the DBMS' error code |
---|
639 | */ |
---|
640 | function errorNative() |
---|
641 | { |
---|
642 | $res = @mssql_query('select @@ERROR as ErrorCode', $this->connection); |
---|
643 | if (!$res) { |
---|
644 | return DB_ERROR; |
---|
645 | } |
---|
646 | $row = @mssql_fetch_row($res); |
---|
647 | return $row[0]; |
---|
648 | } |
---|
649 | |
---|
650 | // }}} |
---|
651 | // {{{ errorCode() |
---|
652 | |
---|
653 | /** |
---|
654 | * Determines PEAR::DB error code from mssql's native codes. |
---|
655 | * |
---|
656 | * If <var>$nativecode</var> isn't known yet, it will be looked up. |
---|
657 | * |
---|
658 | * @param mixed $nativecode mssql error code, if known |
---|
659 | * @return integer an error number from a DB error constant |
---|
660 | * @see errorNative() |
---|
661 | */ |
---|
662 | function errorCode($nativecode = null, $msg = '') |
---|
663 | { |
---|
664 | if (!$nativecode) { |
---|
665 | $nativecode = $this->errorNative(); |
---|
666 | } |
---|
667 | if (isset($this->errorcode_map[$nativecode])) { |
---|
668 | if ($nativecode == 3701 |
---|
669 | && preg_match('/Cannot drop the index/i', $msg)) |
---|
670 | { |
---|
671 | return DB_ERROR_NOT_FOUND; |
---|
672 | } |
---|
673 | return $this->errorcode_map[$nativecode]; |
---|
674 | } else { |
---|
675 | return DB_ERROR; |
---|
676 | } |
---|
677 | } |
---|
678 | |
---|
679 | // }}} |
---|
680 | // {{{ tableInfo() |
---|
681 | |
---|
682 | /** |
---|
683 | * Returns information about a table or a result set |
---|
684 | * |
---|
685 | * NOTE: only supports 'table' and 'flags' if <var>$result</var> |
---|
686 | * is a table name. |
---|
687 | * |
---|
688 | * @param object|string $result DB_result object from a query or a |
---|
689 | * string containing the name of a table. |
---|
690 | * While this also accepts a query result |
---|
691 | * resource identifier, this behavior is |
---|
692 | * deprecated. |
---|
693 | * @param int $mode a valid tableInfo mode |
---|
694 | * |
---|
695 | * @return array an associative array with the information requested. |
---|
696 | * A DB_Error object on failure. |
---|
697 | * |
---|
698 | * @see DB_common::tableInfo() |
---|
699 | */ |
---|
700 | function tableInfo($result, $mode = null) |
---|
701 | { |
---|
702 | if (is_string($result)) { |
---|
703 | /* |
---|
704 | * Probably received a table name. |
---|
705 | * Create a result resource identifier. |
---|
706 | */ |
---|
707 | if (!@mssql_select_db($this->_db, $this->connection)) { |
---|
708 | return $this->mssqlRaiseError(DB_ERROR_NODBSELECTED); |
---|
709 | } |
---|
710 | $id = @mssql_query("SELECT * FROM $result WHERE 1=0", |
---|
711 | $this->connection); |
---|
712 | $got_string = true; |
---|
713 | } elseif (isset($result->result)) { |
---|
714 | /* |
---|
715 | * Probably received a result object. |
---|
716 | * Extract the result resource identifier. |
---|
717 | */ |
---|
718 | $id = $result->result; |
---|
719 | $got_string = false; |
---|
720 | } else { |
---|
721 | /* |
---|
722 | * Probably received a result resource identifier. |
---|
723 | * Copy it. |
---|
724 | * Deprecated. Here for compatibility only. |
---|
725 | */ |
---|
726 | $id = $result; |
---|
727 | $got_string = false; |
---|
728 | } |
---|
729 | |
---|
730 | if (!is_resource($id)) { |
---|
731 | return $this->mssqlRaiseError(DB_ERROR_NEED_MORE_DATA); |
---|
732 | } |
---|
733 | |
---|
734 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
---|
735 | $case_func = 'strtolower'; |
---|
736 | } else { |
---|
737 | $case_func = 'strval'; |
---|
738 | } |
---|
739 | |
---|
740 | $count = @mssql_num_fields($id); |
---|
741 | $res = array(); |
---|
742 | |
---|
743 | if ($mode) { |
---|
744 | $res['num_fields'] = $count; |
---|
745 | } |
---|
746 | |
---|
747 | for ($i = 0; $i < $count; $i++) { |
---|
748 | $res[$i] = array( |
---|
749 | 'table' => $got_string ? $case_func($result) : '', |
---|
750 | 'name' => $case_func(@mssql_field_name($id, $i)), |
---|
751 | 'type' => @mssql_field_type($id, $i), |
---|
752 | 'len' => @mssql_field_length($id, $i), |
---|
753 | // We only support flags for table |
---|
754 | 'flags' => $got_string |
---|
755 | ? $this->_mssql_field_flags($result, |
---|
756 | @mssql_field_name($id, $i)) |
---|
757 | : '', |
---|
758 | ); |
---|
759 | if ($mode & DB_TABLEINFO_ORDER) { |
---|
760 | $res['order'][$res[$i]['name']] = $i; |
---|
761 | } |
---|
762 | if ($mode & DB_TABLEINFO_ORDERTABLE) { |
---|
763 | $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
---|
764 | } |
---|
765 | } |
---|
766 | |
---|
767 | // free the result only if we were called on a table |
---|
768 | if ($got_string) { |
---|
769 | @mssql_free_result($id); |
---|
770 | } |
---|
771 | return $res; |
---|
772 | } |
---|
773 | |
---|
774 | // }}} |
---|
775 | // {{{ _mssql_field_flags() |
---|
776 | |
---|
777 | /** |
---|
778 | * Get a column's flags |
---|
779 | * |
---|
780 | * Supports "not_null", "primary_key", |
---|
781 | * "auto_increment" (mssql identity), "timestamp" (mssql timestamp), |
---|
782 | * "unique_key" (mssql unique index, unique check or primary_key) and |
---|
783 | * "multiple_key" (multikey index) |
---|
784 | * |
---|
785 | * mssql timestamp is NOT similar to the mysql timestamp so this is maybe |
---|
786 | * not useful at all - is the behaviour of mysql_field_flags that primary |
---|
787 | * keys are alway unique? is the interpretation of multiple_key correct? |
---|
788 | * |
---|
789 | * @param string $table the table name |
---|
790 | * @param string $column the field name |
---|
791 | * |
---|
792 | * @return string the flags |
---|
793 | * |
---|
794 | * @access private |
---|
795 | * @author Joern Barthel <j_barthel@web.de> |
---|
796 | */ |
---|
797 | function _mssql_field_flags($table, $column) |
---|
798 | { |
---|
799 | static $tableName = null; |
---|
800 | static $flags = array(); |
---|
801 | |
---|
802 | if ($table != $tableName) { |
---|
803 | |
---|
804 | $flags = array(); |
---|
805 | $tableName = $table; |
---|
806 | |
---|
807 | // get unique and primary keys |
---|
808 | $res = $this->getAll("EXEC SP_HELPINDEX[$table]", DB_FETCHMODE_ASSOC); |
---|
809 | |
---|
810 | foreach ($res as $val) { |
---|
811 | $keys = explode(', ', $val['index_keys']); |
---|
812 | |
---|
813 | if (sizeof($keys) > 1) { |
---|
814 | foreach ($keys as $key) { |
---|
815 | $this->_add_flag($flags[$key], 'multiple_key'); |
---|
816 | } |
---|
817 | } |
---|
818 | |
---|
819 | if (strpos($val['index_description'], 'primary key')) { |
---|
820 | foreach ($keys as $key) { |
---|
821 | $this->_add_flag($flags[$key], 'primary_key'); |
---|
822 | } |
---|
823 | } elseif (strpos($val['index_description'], 'unique')) { |
---|
824 | foreach ($keys as $key) { |
---|
825 | $this->_add_flag($flags[$key], 'unique_key'); |
---|
826 | } |
---|
827 | } |
---|
828 | } |
---|
829 | |
---|
830 | // get auto_increment, not_null and timestamp |
---|
831 | $res = $this->getAll("EXEC SP_COLUMNS[$table]", DB_FETCHMODE_ASSOC); |
---|
832 | |
---|
833 | foreach ($res as $val) { |
---|
834 | $val = array_change_key_case($val, CASE_LOWER); |
---|
835 | if ($val['nullable'] == '0') { |
---|
836 | $this->_add_flag($flags[$val['column_name']], 'not_null'); |
---|
837 | } |
---|
838 | if (strpos($val['type_name'], 'identity')) { |
---|
839 | $this->_add_flag($flags[$val['column_name']], 'auto_increment'); |
---|
840 | } |
---|
841 | if (strpos($val['type_name'], 'timestamp')) { |
---|
842 | $this->_add_flag($flags[$val['column_name']], 'timestamp'); |
---|
843 | } |
---|
844 | } |
---|
845 | } |
---|
846 | |
---|
847 | if (array_key_exists($column, $flags)) { |
---|
848 | return(implode(' ', $flags[$column])); |
---|
849 | } |
---|
850 | return ''; |
---|
851 | } |
---|
852 | |
---|
853 | // }}} |
---|
854 | // {{{ _add_flag() |
---|
855 | |
---|
856 | /** |
---|
857 | * Adds a string to the flags array if the flag is not yet in there |
---|
858 | * - if there is no flag present the array is created |
---|
859 | * |
---|
860 | * @param array &$array the reference to the flag-array |
---|
861 | * @param string $value the flag value |
---|
862 | * |
---|
863 | * @return void |
---|
864 | * |
---|
865 | * @access private |
---|
866 | * @author Joern Barthel <j_barthel@web.de> |
---|
867 | */ |
---|
868 | function _add_flag(&$array, $value) |
---|
869 | { |
---|
870 | if (!is_array($array)) { |
---|
871 | $array = array($value); |
---|
872 | } elseif (!in_array($value, $array)) { |
---|
873 | array_push($array, $value); |
---|
874 | } |
---|
875 | } |
---|
876 | |
---|
877 | // }}} |
---|
878 | // {{{ getSpecialQuery() |
---|
879 | |
---|
880 | /** |
---|
881 | * Obtains the query string needed for listing a given type of objects |
---|
882 | * |
---|
883 | * @param string $type the kind of objects you want to retrieve |
---|
884 | * |
---|
885 | * @return string the SQL query string or null if the driver doesn't |
---|
886 | * support the object type requested |
---|
887 | * |
---|
888 | * @access protected |
---|
889 | * @see DB_common::getListOf() |
---|
890 | */ |
---|
891 | function getSpecialQuery($type) |
---|
892 | { |
---|
893 | switch ($type) { |
---|
894 | case 'tables': |
---|
895 | return "SELECT name FROM sysobjects WHERE type = 'U'" |
---|
896 | . ' ORDER BY name'; |
---|
897 | case 'views': |
---|
898 | return "SELECT name FROM sysobjects WHERE type = 'V'"; |
---|
899 | default: |
---|
900 | return null; |
---|
901 | } |
---|
902 | } |
---|
903 | |
---|
904 | // }}} |
---|
905 | } |
---|
906 | |
---|
907 | /* |
---|
908 | * Local variables: |
---|
909 | * tab-width: 4 |
---|
910 | * c-basic-offset: 4 |
---|
911 | * End: |
---|
912 | */ |
---|
913 | |
---|
914 | ?> |
---|