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 pgsql extension |
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7 | * for interacting with PostgreSQL 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 Rui Hirokawa <hirokawa@php.net> |
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20 | * @author Stig Bakken <ssb@php.net> |
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21 | * @author Daniel Convissor <danielc@php.net> |
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22 | * @copyright 1997-2007 The PHP Group |
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23 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
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24 | * @version CVS: $Id$ |
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25 | * @link http://pear.php.net/package/DB |
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26 | */ |
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27 | |
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28 | /** |
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29 | * Obtain the DB_common class so it can be extended from |
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30 | */ |
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31 | require_once DB_PHP_DIR . '/DB/common.php'; |
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32 | |
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33 | /** |
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34 | * The methods PEAR DB uses to interact with PHP's pgsql extension |
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35 | * for interacting with PostgreSQL databases |
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36 | * |
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37 | * These methods overload the ones declared in DB_common. |
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38 | * |
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39 | * @category Database |
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40 | * @package DB |
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41 | * @author Rui Hirokawa <hirokawa@php.net> |
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42 | * @author Stig Bakken <ssb@php.net> |
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43 | * @author Daniel Convissor <danielc@php.net> |
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44 | * @copyright 1997-2007 The PHP Group |
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45 | * @license http://www.php.net/license/3_0.txt PHP License 3.0 |
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46 | * @version Release: 1.7.14RC1 |
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47 | * @link http://pear.php.net/package/DB |
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48 | */ |
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49 | class DB_pgsql extends DB_common |
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50 | { |
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51 | // {{{ properties |
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52 | |
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53 | /** |
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54 | * The DB driver type (mysql, oci8, odbc, etc.) |
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55 | * @var string |
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56 | */ |
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57 | var $phptype = 'pgsql'; |
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58 | |
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59 | /** |
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60 | * The database syntax variant to be used (db2, access, etc.), if any |
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61 | * @var string |
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62 | */ |
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63 | var $dbsyntax = 'pgsql'; |
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64 | |
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65 | /** |
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66 | * The capabilities of this DB implementation |
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67 | * |
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68 | * The 'new_link' element contains the PHP version that first provided |
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69 | * new_link support for this DBMS. Contains false if it's unsupported. |
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70 | * |
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71 | * Meaning of the 'limit' element: |
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72 | * + 'emulate' = emulate with fetch row by number |
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73 | * + 'alter' = alter the query |
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74 | * + false = skip rows |
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75 | * |
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76 | * @var array |
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77 | */ |
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78 | var $features = array( |
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79 | 'limit' => 'alter', |
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80 | 'new_link' => '4.3.0', |
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81 | 'numrows' => true, |
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82 | 'pconnect' => true, |
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83 | 'prepare' => false, |
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84 | 'ssl' => true, |
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85 | 'transactions' => true, |
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86 | ); |
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87 | |
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88 | /** |
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89 | * A mapping of native error codes to DB error codes |
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90 | * @var array |
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91 | */ |
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92 | var $errorcode_map = array( |
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93 | ); |
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94 | |
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95 | /** |
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96 | * The raw database connection created by PHP |
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97 | * @var resource |
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98 | */ |
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99 | var $connection; |
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100 | |
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101 | /** |
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102 | * The DSN information for connecting to a database |
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103 | * @var array |
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104 | */ |
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105 | var $dsn = array(); |
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106 | |
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107 | |
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108 | /** |
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109 | * Should data manipulation queries be committed automatically? |
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110 | * @var bool |
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111 | * @access private |
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112 | */ |
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113 | var $autocommit = true; |
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114 | |
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115 | /** |
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116 | * The quantity of transactions begun |
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117 | * |
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118 | * {@internal While this is private, it can't actually be designated |
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119 | * private in PHP 5 because it is directly accessed in the test suite.}} |
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120 | * |
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121 | * @var integer |
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122 | * @access private |
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123 | */ |
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124 | var $transaction_opcount = 0; |
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125 | |
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126 | /** |
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127 | * The number of rows affected by a data manipulation query |
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128 | * @var integer |
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129 | */ |
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130 | var $affected = 0; |
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131 | |
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132 | /** |
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133 | * The current row being looked at in fetchInto() |
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134 | * @var array |
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135 | * @access private |
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136 | */ |
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137 | var $row = array(); |
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138 | |
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139 | /** |
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140 | * The number of rows in a given result set |
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141 | * @var array |
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142 | * @access private |
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143 | */ |
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144 | var $_num_rows = array(); |
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145 | |
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146 | |
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147 | // }}} |
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148 | // {{{ constructor |
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149 | |
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150 | /** |
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151 | * This constructor calls <kbd>$this->DB_common()</kbd> |
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152 | * |
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153 | * @return void |
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154 | */ |
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155 | function DB_pgsql() |
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156 | { |
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157 | $this->DB_common(); |
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158 | } |
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159 | |
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160 | // }}} |
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161 | // {{{ connect() |
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162 | |
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163 | /** |
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164 | * Connect to the database server, log in and open the database |
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165 | * |
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166 | * Don't call this method directly. Use DB::connect() instead. |
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167 | * |
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168 | * PEAR DB's pgsql driver supports the following extra DSN options: |
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169 | * + connect_timeout How many seconds to wait for a connection to |
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170 | * be established. Available since PEAR DB 1.7.0. |
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171 | * + new_link If set to true, causes subsequent calls to |
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172 | * connect() to return a new connection link |
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173 | * instead of the existing one. WARNING: this is |
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174 | * not portable to other DBMS's. Available only |
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175 | * if PHP is >= 4.3.0 and PEAR DB is >= 1.7.0. |
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176 | * + options Command line options to be sent to the server. |
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177 | * Available since PEAR DB 1.6.4. |
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178 | * + service Specifies a service name in pg_service.conf that |
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179 | * holds additional connection parameters. |
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180 | * Available since PEAR DB 1.7.0. |
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181 | * + sslmode How should SSL be used when connecting? Values: |
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182 | * disable, allow, prefer or require. |
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183 | * Available since PEAR DB 1.7.0. |
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184 | * + tty This was used to specify where to send server |
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185 | * debug output. Available since PEAR DB 1.6.4. |
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186 | * |
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187 | * Example of connecting to a new link via a socket: |
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188 | * <code> |
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189 | * require_once 'DB.php'; |
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190 | * |
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191 | * $dsn = 'pgsql://user:pass@unix(/tmp)/dbname?new_link=true'; |
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192 | * $options = array( |
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193 | * 'portability' => DB_PORTABILITY_ALL, |
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194 | * ); |
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195 | * |
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196 | * $db = DB::connect($dsn, $options); |
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197 | * if (PEAR::isError($db)) { |
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198 | * die($db->getMessage()); |
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199 | * } |
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200 | * </code> |
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201 | * |
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202 | * @param array $dsn the data source name |
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203 | * @param bool $persistent should the connection be persistent? |
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204 | * |
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205 | * @return int DB_OK on success. A DB_Error object on failure. |
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206 | * |
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207 | * @link http://www.postgresql.org/docs/current/static/libpq.html#LIBPQ-CONNECT |
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208 | */ |
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209 | function connect($dsn, $persistent = false) |
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210 | { |
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211 | if (!PEAR::loadExtension('pgsql')) { |
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212 | return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
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213 | } |
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214 | |
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215 | $this->dsn = $dsn; |
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216 | if ($dsn['dbsyntax']) { |
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217 | $this->dbsyntax = $dsn['dbsyntax']; |
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218 | } |
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219 | |
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220 | $protocol = $dsn['protocol'] ? $dsn['protocol'] : 'tcp'; |
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221 | |
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222 | $params = array(''); |
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223 | if ($protocol == 'tcp') { |
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224 | if ($dsn['hostspec']) { |
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225 | $params[0] .= 'host=' . $dsn['hostspec']; |
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226 | } |
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227 | if ($dsn['port']) { |
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228 | $params[0] .= ' port=' . $dsn['port']; |
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229 | } |
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230 | } elseif ($protocol == 'unix') { |
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231 | // Allow for pg socket in non-standard locations. |
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232 | if ($dsn['socket']) { |
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233 | $params[0] .= 'host=' . $dsn['socket']; |
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234 | } |
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235 | if ($dsn['port']) { |
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236 | $params[0] .= ' port=' . $dsn['port']; |
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237 | } |
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238 | } |
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239 | if ($dsn['database']) { |
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240 | $params[0] .= ' dbname=\'' . addslashes($dsn['database']) . '\''; |
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241 | } |
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242 | if ($dsn['username']) { |
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243 | $params[0] .= ' user=\'' . addslashes($dsn['username']) . '\''; |
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244 | } |
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245 | if ($dsn['password']) { |
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246 | $params[0] .= ' password=\'' . addslashes($dsn['password']) . '\''; |
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247 | } |
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248 | if (!empty($dsn['options'])) { |
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249 | $params[0] .= ' options=' . $dsn['options']; |
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250 | } |
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251 | if (!empty($dsn['tty'])) { |
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252 | $params[0] .= ' tty=' . $dsn['tty']; |
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253 | } |
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254 | if (!empty($dsn['connect_timeout'])) { |
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255 | $params[0] .= ' connect_timeout=' . $dsn['connect_timeout']; |
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256 | } |
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257 | if (!empty($dsn['sslmode'])) { |
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258 | $params[0] .= ' sslmode=' . $dsn['sslmode']; |
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259 | } |
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260 | if (!empty($dsn['service'])) { |
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261 | $params[0] .= ' service=' . $dsn['service']; |
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262 | } |
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263 | |
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264 | if (isset($dsn['new_link']) |
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265 | && ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)) |
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266 | { |
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267 | if (version_compare(phpversion(), '4.3.0', '>=')) { |
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268 | $params[] = PGSQL_CONNECT_FORCE_NEW; |
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269 | } |
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270 | } |
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271 | |
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272 | $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect'; |
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273 | |
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274 | $ini = ini_get('track_errors'); |
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275 | $php_errormsg = ''; |
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276 | if ($ini) { |
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277 | $this->connection = @call_user_func_array($connect_function, |
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278 | $params); |
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279 | } else { |
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280 | @ini_set('track_errors', 1); |
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281 | $this->connection = @call_user_func_array($connect_function, |
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282 | $params); |
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283 | @ini_set('track_errors', $ini); |
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284 | } |
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285 | |
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286 | if (!$this->connection) { |
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287 | return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
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288 | null, null, null, |
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289 | $php_errormsg); |
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290 | } |
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291 | return DB_OK; |
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292 | } |
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293 | |
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294 | // }}} |
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295 | // {{{ disconnect() |
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296 | |
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297 | /** |
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298 | * Disconnects from the database server |
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299 | * |
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300 | * @return bool TRUE on success, FALSE on failure |
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301 | */ |
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302 | function disconnect() |
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303 | { |
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304 | $ret = @pg_close($this->connection); |
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305 | $this->connection = null; |
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306 | return $ret; |
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307 | } |
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308 | |
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309 | // }}} |
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310 | // {{{ simpleQuery() |
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311 | |
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312 | /** |
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313 | * Sends a query to the database server |
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314 | * |
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315 | * @param string the SQL query string |
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316 | * |
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317 | * @return mixed + a PHP result resrouce for successful SELECT queries |
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318 | * + the DB_OK constant for other successful queries |
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319 | * + a DB_Error object on failure |
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320 | */ |
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321 | function simpleQuery($query) |
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322 | { |
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323 | $ismanip = $this->_checkManip($query); |
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324 | $this->last_query = $query; |
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325 | $query = $this->modifyQuery($query); |
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326 | if (!$this->autocommit && $ismanip) { |
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327 | if ($this->transaction_opcount == 0) { |
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328 | $result = @pg_exec($this->connection, 'begin;'); |
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329 | if (!$result) { |
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330 | return $this->pgsqlRaiseError(); |
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331 | } |
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332 | } |
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333 | $this->transaction_opcount++; |
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334 | } |
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335 | $result = @pg_exec($this->connection, $query); |
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336 | if (!$result) { |
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337 | return $this->pgsqlRaiseError(); |
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338 | } |
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339 | |
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340 | /* |
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341 | * Determine whether queries produce affected rows, result or nothing. |
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342 | * |
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343 | * This logic was introduced in version 1.1 of the file by ssb, |
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344 | * though the regex has been modified slightly since then. |
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345 | * |
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346 | * PostgreSQL commands: |
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347 | * ABORT, ALTER, BEGIN, CLOSE, CLUSTER, COMMIT, COPY, |
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348 | * CREATE, DECLARE, DELETE, DROP TABLE, EXPLAIN, FETCH, |
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349 | * GRANT, INSERT, LISTEN, LOAD, LOCK, MOVE, NOTIFY, RESET, |
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350 | * REVOKE, ROLLBACK, SELECT, SELECT INTO, SET, SHOW, |
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351 | * UNLISTEN, UPDATE, VACUUM |
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352 | */ |
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353 | if ($ismanip) { |
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354 | $this->affected = @pg_affected_rows($result); |
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355 | return DB_OK; |
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356 | } elseif (preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|FETCH|SHOW)\s/si', |
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357 | $query)) |
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358 | { |
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359 | $this->row[(int)$result] = 0; // reset the row counter. |
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360 | $numrows = $this->numRows($result); |
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361 | if (is_object($numrows)) { |
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362 | return $numrows; |
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363 | } |
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364 | $this->_num_rows[(int)$result] = $numrows; |
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365 | $this->affected = 0; |
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366 | return $result; |
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367 | } else { |
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368 | $this->affected = 0; |
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369 | return DB_OK; |
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370 | } |
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371 | } |
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372 | |
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373 | // }}} |
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374 | // {{{ nextResult() |
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375 | |
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376 | /** |
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377 | * Move the internal pgsql result pointer to the next available result |
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378 | * |
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379 | * @param a valid fbsql result resource |
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380 | * |
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381 | * @access public |
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382 | * |
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383 | * @return true if a result is available otherwise return false |
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384 | */ |
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385 | function nextResult($result) |
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386 | { |
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387 | return false; |
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388 | } |
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389 | |
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390 | // }}} |
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391 | // {{{ fetchInto() |
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392 | |
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393 | /** |
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394 | * Places a row from the result set into the given array |
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395 | * |
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396 | * Formating of the array and the data therein are configurable. |
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397 | * See DB_result::fetchInto() for more information. |
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398 | * |
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399 | * This method is not meant to be called directly. Use |
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400 | * DB_result::fetchInto() instead. It can't be declared "protected" |
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401 | * because DB_result is a separate object. |
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402 | * |
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403 | * @param resource $result the query result resource |
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404 | * @param array $arr the referenced array to put the data in |
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405 | * @param int $fetchmode how the resulting array should be indexed |
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406 | * @param int $rownum the row number to fetch (0 = first row) |
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407 | * |
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408 | * @return mixed DB_OK on success, NULL when the end of a result set is |
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409 | * reached or on failure |
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410 | * |
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411 | * @see DB_result::fetchInto() |
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412 | */ |
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413 | function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
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414 | { |
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415 | $result_int = (int)$result; |
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416 | $rownum = ($rownum !== null) ? $rownum : $this->row[$result_int]; |
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417 | if ($rownum >= $this->_num_rows[$result_int]) { |
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418 | return null; |
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419 | } |
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420 | if ($fetchmode & DB_FETCHMODE_ASSOC) { |
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421 | $arr = @pg_fetch_array($result, $rownum, PGSQL_ASSOC); |
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422 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
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423 | $arr = array_change_key_case($arr, CASE_LOWER); |
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424 | } |
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425 | } else { |
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426 | $arr = @pg_fetch_row($result, $rownum); |
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427 | } |
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428 | if (!$arr) { |
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429 | return null; |
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430 | } |
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431 | if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
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432 | $this->_rtrimArrayValues($arr); |
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433 | } |
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434 | if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
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435 | $this->_convertNullArrayValuesToEmpty($arr); |
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436 | } |
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437 | $this->row[$result_int] = ++$rownum; |
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438 | return DB_OK; |
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439 | } |
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440 | |
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441 | // }}} |
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442 | // {{{ freeResult() |
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443 | |
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444 | /** |
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445 | * Deletes the result set and frees the memory occupied by the result set |
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446 | * |
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447 | * This method is not meant to be called directly. Use |
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448 | * DB_result::free() instead. It can't be declared "protected" |
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449 | * because DB_result is a separate object. |
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450 | * |
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451 | * @param resource $result PHP's query result resource |
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452 | * |
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453 | * @return bool TRUE on success, FALSE if $result is invalid |
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454 | * |
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455 | * @see DB_result::free() |
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456 | */ |
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457 | function freeResult($result) |
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458 | { |
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459 | if (is_resource($result)) { |
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460 | unset($this->row[(int)$result]); |
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461 | unset($this->_num_rows[(int)$result]); |
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462 | $this->affected = 0; |
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463 | return @pg_freeresult($result); |
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464 | } |
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465 | return false; |
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466 | } |
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467 | |
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468 | // }}} |
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469 | // {{{ quote() |
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470 | |
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471 | /** |
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472 | * @deprecated Deprecated in release 1.6.0 |
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473 | * @internal |
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474 | */ |
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475 | function quote($str) |
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476 | { |
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477 | return $this->quoteSmart($str); |
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478 | } |
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479 | |
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480 | // }}} |
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481 | // {{{ quoteBoolean() |
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482 | |
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483 | /** |
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484 | * Formats a boolean value for use within a query in a locale-independent |
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485 | * manner. |
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486 | * |
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487 | * @param boolean the boolean value to be quoted. |
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488 | * @return string the quoted string. |
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489 | * @see DB_common::quoteSmart() |
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490 | * @since Method available since release 1.7.8. |
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491 | */ |
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492 | function quoteBoolean($boolean) { |
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493 | return $boolean ? 'TRUE' : 'FALSE'; |
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494 | } |
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495 | |
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496 | // }}} |
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497 | // {{{ escapeSimple() |
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498 | |
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499 | /** |
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500 | * Escapes a string according to the current DBMS's standards |
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501 | * |
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502 | * {@internal PostgreSQL treats a backslash as an escape character, |
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503 | * so they are escaped as well. |
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504 | * |
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505 | * @param string $str the string to be escaped |
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506 | * |
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507 | * @return string the escaped string |
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508 | * |
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509 | * @see DB_common::quoteSmart() |
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510 | * @since Method available since Release 1.6.0 |
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511 | */ |
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512 | function escapeSimple($str) |
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513 | { |
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514 | if (function_exists('pg_escape_string')) { |
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515 | /* This fixes an undocumented BC break in PHP 5.2.0 which changed |
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516 | * the prototype of pg_escape_string. I'm not thrilled about having |
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517 | * to sniff the PHP version, quite frankly, but it's the only way |
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518 | * to deal with the problem. Revision 1.331.2.13.2.10 on |
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519 | * php-src/ext/pgsql/pgsql.c (PHP_5_2 branch) is to blame, for the |
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520 | * record. */ |
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521 | if (version_compare(PHP_VERSION, '5.2.0', '>=')) { |
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522 | return pg_escape_string($this->connection, $str); |
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523 | } else { |
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524 | return pg_escape_string($str); |
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525 | } |
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526 | } else { |
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527 | return str_replace("'", "''", str_replace('\\', '\\\\', $str)); |
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528 | } |
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529 | } |
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530 | |
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531 | // }}} |
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532 | // {{{ numCols() |
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533 | |
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534 | /** |
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535 | * Gets the number of columns in a result set |
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536 | * |
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537 | * This method is not meant to be called directly. Use |
---|
538 | * DB_result::numCols() instead. It can't be declared "protected" |
---|
539 | * because DB_result is a separate object. |
---|
540 | * |
---|
541 | * @param resource $result PHP's query result resource |
---|
542 | * |
---|
543 | * @return int the number of columns. A DB_Error object on failure. |
---|
544 | * |
---|
545 | * @see DB_result::numCols() |
---|
546 | */ |
---|
547 | function numCols($result) |
---|
548 | { |
---|
549 | $cols = @pg_numfields($result); |
---|
550 | if (!$cols) { |
---|
551 | return $this->pgsqlRaiseError(); |
---|
552 | } |
---|
553 | return $cols; |
---|
554 | } |
---|
555 | |
---|
556 | // }}} |
---|
557 | // {{{ numRows() |
---|
558 | |
---|
559 | /** |
---|
560 | * Gets the number of rows in a result set |
---|
561 | * |
---|
562 | * This method is not meant to be called directly. Use |
---|
563 | * DB_result::numRows() instead. It can't be declared "protected" |
---|
564 | * because DB_result is a separate object. |
---|
565 | * |
---|
566 | * @param resource $result PHP's query result resource |
---|
567 | * |
---|
568 | * @return int the number of rows. A DB_Error object on failure. |
---|
569 | * |
---|
570 | * @see DB_result::numRows() |
---|
571 | */ |
---|
572 | function numRows($result) |
---|
573 | { |
---|
574 | $rows = @pg_numrows($result); |
---|
575 | if ($rows === null) { |
---|
576 | return $this->pgsqlRaiseError(); |
---|
577 | } |
---|
578 | return $rows; |
---|
579 | } |
---|
580 | |
---|
581 | // }}} |
---|
582 | // {{{ autoCommit() |
---|
583 | |
---|
584 | /** |
---|
585 | * Enables or disables automatic commits |
---|
586 | * |
---|
587 | * @param bool $onoff true turns it on, false turns it off |
---|
588 | * |
---|
589 | * @return int DB_OK on success. A DB_Error object if the driver |
---|
590 | * doesn't support auto-committing transactions. |
---|
591 | */ |
---|
592 | function autoCommit($onoff = false) |
---|
593 | { |
---|
594 | // XXX if $this->transaction_opcount > 0, we should probably |
---|
595 | // issue a warning here. |
---|
596 | $this->autocommit = $onoff ? true : false; |
---|
597 | return DB_OK; |
---|
598 | } |
---|
599 | |
---|
600 | // }}} |
---|
601 | // {{{ commit() |
---|
602 | |
---|
603 | /** |
---|
604 | * Commits the current transaction |
---|
605 | * |
---|
606 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
607 | */ |
---|
608 | function commit() |
---|
609 | { |
---|
610 | if ($this->transaction_opcount > 0) { |
---|
611 | // (disabled) hack to shut up error messages from libpq.a |
---|
612 | //@fclose(@fopen("php://stderr", "w")); |
---|
613 | $result = @pg_exec($this->connection, 'end;'); |
---|
614 | $this->transaction_opcount = 0; |
---|
615 | if (!$result) { |
---|
616 | return $this->pgsqlRaiseError(); |
---|
617 | } |
---|
618 | } |
---|
619 | return DB_OK; |
---|
620 | } |
---|
621 | |
---|
622 | // }}} |
---|
623 | // {{{ rollback() |
---|
624 | |
---|
625 | /** |
---|
626 | * Reverts the current transaction |
---|
627 | * |
---|
628 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
629 | */ |
---|
630 | function rollback() |
---|
631 | { |
---|
632 | if ($this->transaction_opcount > 0) { |
---|
633 | $result = @pg_exec($this->connection, 'abort;'); |
---|
634 | $this->transaction_opcount = 0; |
---|
635 | if (!$result) { |
---|
636 | return $this->pgsqlRaiseError(); |
---|
637 | } |
---|
638 | } |
---|
639 | return DB_OK; |
---|
640 | } |
---|
641 | |
---|
642 | // }}} |
---|
643 | // {{{ affectedRows() |
---|
644 | |
---|
645 | /** |
---|
646 | * Determines the number of rows affected by a data maniuplation query |
---|
647 | * |
---|
648 | * 0 is returned for queries that don't manipulate data. |
---|
649 | * |
---|
650 | * @return int the number of rows. A DB_Error object on failure. |
---|
651 | */ |
---|
652 | function affectedRows() |
---|
653 | { |
---|
654 | return $this->affected; |
---|
655 | } |
---|
656 | |
---|
657 | // }}} |
---|
658 | // {{{ nextId() |
---|
659 | |
---|
660 | /** |
---|
661 | * Returns the next free id in a sequence |
---|
662 | * |
---|
663 | * @param string $seq_name name of the sequence |
---|
664 | * @param boolean $ondemand when true, the seqence is automatically |
---|
665 | * created if it does not exist |
---|
666 | * |
---|
667 | * @return int the next id number in the sequence. |
---|
668 | * A DB_Error object on failure. |
---|
669 | * |
---|
670 | * @see DB_common::nextID(), DB_common::getSequenceName(), |
---|
671 | * DB_pgsql::createSequence(), DB_pgsql::dropSequence() |
---|
672 | */ |
---|
673 | function nextId($seq_name, $ondemand = true) |
---|
674 | { |
---|
675 | $seqname = $this->getSequenceName($seq_name); |
---|
676 | $repeat = false; |
---|
677 | do { |
---|
678 | $this->pushErrorHandling(PEAR_ERROR_RETURN); |
---|
679 | $result = $this->query("SELECT NEXTVAL('${seqname}')"); |
---|
680 | $this->popErrorHandling(); |
---|
681 | if ($ondemand && DB::isError($result) && |
---|
682 | $result->getCode() == DB_ERROR_NOSUCHTABLE) { |
---|
683 | $repeat = true; |
---|
684 | $this->pushErrorHandling(PEAR_ERROR_RETURN); |
---|
685 | $result = $this->createSequence($seq_name); |
---|
686 | $this->popErrorHandling(); |
---|
687 | if (DB::isError($result)) { |
---|
688 | return $this->raiseError($result); |
---|
689 | } |
---|
690 | } else { |
---|
691 | $repeat = false; |
---|
692 | } |
---|
693 | } while ($repeat); |
---|
694 | if (DB::isError($result)) { |
---|
695 | return $this->raiseError($result); |
---|
696 | } |
---|
697 | $arr = $result->fetchRow(DB_FETCHMODE_ORDERED); |
---|
698 | $result->free(); |
---|
699 | return $arr[0]; |
---|
700 | } |
---|
701 | |
---|
702 | // }}} |
---|
703 | // {{{ createSequence() |
---|
704 | |
---|
705 | /** |
---|
706 | * Creates a new sequence |
---|
707 | * |
---|
708 | * @param string $seq_name name of the new sequence |
---|
709 | * |
---|
710 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
711 | * |
---|
712 | * @see DB_common::createSequence(), DB_common::getSequenceName(), |
---|
713 | * DB_pgsql::nextID(), DB_pgsql::dropSequence() |
---|
714 | */ |
---|
715 | function createSequence($seq_name) |
---|
716 | { |
---|
717 | $seqname = $this->getSequenceName($seq_name); |
---|
718 | $result = $this->query("CREATE SEQUENCE ${seqname}"); |
---|
719 | return $result; |
---|
720 | } |
---|
721 | |
---|
722 | // }}} |
---|
723 | // {{{ dropSequence() |
---|
724 | |
---|
725 | /** |
---|
726 | * Deletes a sequence |
---|
727 | * |
---|
728 | * @param string $seq_name name of the sequence to be deleted |
---|
729 | * |
---|
730 | * @return int DB_OK on success. A DB_Error object on failure. |
---|
731 | * |
---|
732 | * @see DB_common::dropSequence(), DB_common::getSequenceName(), |
---|
733 | * DB_pgsql::nextID(), DB_pgsql::createSequence() |
---|
734 | */ |
---|
735 | function dropSequence($seq_name) |
---|
736 | { |
---|
737 | return $this->query('DROP SEQUENCE ' |
---|
738 | . $this->getSequenceName($seq_name)); |
---|
739 | } |
---|
740 | |
---|
741 | // }}} |
---|
742 | // {{{ modifyLimitQuery() |
---|
743 | |
---|
744 | /** |
---|
745 | * Adds LIMIT clauses to a query string according to current DBMS standards |
---|
746 | * |
---|
747 | * @param string $query the query to modify |
---|
748 | * @param int $from the row to start to fetching (0 = the first row) |
---|
749 | * @param int $count the numbers of rows to fetch |
---|
750 | * @param mixed $params array, string or numeric data to be used in |
---|
751 | * execution of the statement. Quantity of items |
---|
752 | * passed must match quantity of placeholders in |
---|
753 | * query: meaning 1 placeholder for non-array |
---|
754 | * parameters or 1 placeholder per array element. |
---|
755 | * |
---|
756 | * @return string the query string with LIMIT clauses added |
---|
757 | * |
---|
758 | * @access protected |
---|
759 | */ |
---|
760 | function modifyLimitQuery($query, $from, $count, $params = array()) |
---|
761 | { |
---|
762 | return "$query LIMIT $count OFFSET $from"; |
---|
763 | } |
---|
764 | |
---|
765 | // }}} |
---|
766 | // {{{ pgsqlRaiseError() |
---|
767 | |
---|
768 | /** |
---|
769 | * Produces a DB_Error object regarding the current problem |
---|
770 | * |
---|
771 | * @param int $errno if the error is being manually raised pass a |
---|
772 | * DB_ERROR* constant here. If this isn't passed |
---|
773 | * the error information gathered from the DBMS. |
---|
774 | * |
---|
775 | * @return object the DB_Error object |
---|
776 | * |
---|
777 | * @see DB_common::raiseError(), |
---|
778 | * DB_pgsql::errorNative(), DB_pgsql::errorCode() |
---|
779 | */ |
---|
780 | function pgsqlRaiseError($errno = null) |
---|
781 | { |
---|
782 | $native = $this->errorNative(); |
---|
783 | if (!$native) { |
---|
784 | $native = 'Database connection has been lost.'; |
---|
785 | $errno = DB_ERROR_CONNECT_FAILED; |
---|
786 | } |
---|
787 | if ($errno === null) { |
---|
788 | $errno = $this->errorCode($native); |
---|
789 | } |
---|
790 | return $this->raiseError($errno, null, null, null, $native); |
---|
791 | } |
---|
792 | |
---|
793 | // }}} |
---|
794 | // {{{ errorNative() |
---|
795 | |
---|
796 | /** |
---|
797 | * Gets the DBMS' native error message produced by the last query |
---|
798 | * |
---|
799 | * {@internal Error messages are used instead of error codes |
---|
800 | * in order to support older versions of PostgreSQL.}} |
---|
801 | * |
---|
802 | * @return string the DBMS' error message |
---|
803 | */ |
---|
804 | function errorNative() |
---|
805 | { |
---|
806 | return @pg_errormessage($this->connection); |
---|
807 | } |
---|
808 | |
---|
809 | // }}} |
---|
810 | // {{{ errorCode() |
---|
811 | |
---|
812 | /** |
---|
813 | * Determines PEAR::DB error code from the database's text error message. |
---|
814 | * |
---|
815 | * @param string $errormsg error message returned from the database |
---|
816 | * @return integer an error number from a DB error constant |
---|
817 | */ |
---|
818 | function errorCode($errormsg) |
---|
819 | { |
---|
820 | static $error_regexps; |
---|
821 | if (!isset($error_regexps)) { |
---|
822 | $error_regexps = array( |
---|
823 | '/column .* (of relation .*)?does not exist/i' |
---|
824 | => DB_ERROR_NOSUCHFIELD, |
---|
825 | '/(relation|sequence|table).*does not exist|class .* not found/i' |
---|
826 | => DB_ERROR_NOSUCHTABLE, |
---|
827 | '/index .* does not exist/' |
---|
828 | => DB_ERROR_NOT_FOUND, |
---|
829 | '/relation .* already exists/i' |
---|
830 | => DB_ERROR_ALREADY_EXISTS, |
---|
831 | '/(divide|division) by zero$/i' |
---|
832 | => DB_ERROR_DIVZERO, |
---|
833 | '/pg_atoi: error in .*: can\'t parse /i' |
---|
834 | => DB_ERROR_INVALID_NUMBER, |
---|
835 | '/invalid input syntax for( type)? (integer|numeric)/i' |
---|
836 | => DB_ERROR_INVALID_NUMBER, |
---|
837 | '/value .* is out of range for type \w*int/i' |
---|
838 | => DB_ERROR_INVALID_NUMBER, |
---|
839 | '/integer out of range/i' |
---|
840 | => DB_ERROR_INVALID_NUMBER, |
---|
841 | '/value too long for type character/i' |
---|
842 | => DB_ERROR_INVALID, |
---|
843 | '/attribute .* not found|relation .* does not have attribute/i' |
---|
844 | => DB_ERROR_NOSUCHFIELD, |
---|
845 | '/column .* specified in USING clause does not exist in (left|right) table/i' |
---|
846 | => DB_ERROR_NOSUCHFIELD, |
---|
847 | '/parser: parse error at or near/i' |
---|
848 | => DB_ERROR_SYNTAX, |
---|
849 | '/syntax error at/' |
---|
850 | => DB_ERROR_SYNTAX, |
---|
851 | '/column reference .* is ambiguous/i' |
---|
852 | => DB_ERROR_SYNTAX, |
---|
853 | '/permission denied/' |
---|
854 | => DB_ERROR_ACCESS_VIOLATION, |
---|
855 | '/violates not-null constraint/' |
---|
856 | => DB_ERROR_CONSTRAINT_NOT_NULL, |
---|
857 | '/violates [\w ]+ constraint/' |
---|
858 | => DB_ERROR_CONSTRAINT, |
---|
859 | '/referential integrity violation/' |
---|
860 | => DB_ERROR_CONSTRAINT, |
---|
861 | '/more expressions than target columns/i' |
---|
862 | => DB_ERROR_VALUE_COUNT_ON_ROW, |
---|
863 | ); |
---|
864 | } |
---|
865 | foreach ($error_regexps as $regexp => $code) { |
---|
866 | if (preg_match($regexp, $errormsg)) { |
---|
867 | return $code; |
---|
868 | } |
---|
869 | } |
---|
870 | // Fall back to DB_ERROR if there was no mapping. |
---|
871 | return DB_ERROR; |
---|
872 | } |
---|
873 | |
---|
874 | // }}} |
---|
875 | // {{{ tableInfo() |
---|
876 | |
---|
877 | /** |
---|
878 | * Returns information about a table or a result set |
---|
879 | * |
---|
880 | * NOTE: only supports 'table' and 'flags' if <var>$result</var> |
---|
881 | * is a table name. |
---|
882 | * |
---|
883 | * @param object|string $result DB_result object from a query or a |
---|
884 | * string containing the name of a table. |
---|
885 | * While this also accepts a query result |
---|
886 | * resource identifier, this behavior is |
---|
887 | * deprecated. |
---|
888 | * @param int $mode a valid tableInfo mode |
---|
889 | * |
---|
890 | * @return array an associative array with the information requested. |
---|
891 | * A DB_Error object on failure. |
---|
892 | * |
---|
893 | * @see DB_common::tableInfo() |
---|
894 | */ |
---|
895 | function tableInfo($result, $mode = null) |
---|
896 | { |
---|
897 | if (is_string($result)) { |
---|
898 | /* |
---|
899 | * Probably received a table name. |
---|
900 | * Create a result resource identifier. |
---|
901 | */ |
---|
902 | $id = @pg_exec($this->connection, "SELECT * FROM $result LIMIT 0"); |
---|
903 | $got_string = true; |
---|
904 | } elseif (isset($result->result)) { |
---|
905 | /* |
---|
906 | * Probably received a result object. |
---|
907 | * Extract the result resource identifier. |
---|
908 | */ |
---|
909 | $id = $result->result; |
---|
910 | $got_string = false; |
---|
911 | } else { |
---|
912 | /* |
---|
913 | * Probably received a result resource identifier. |
---|
914 | * Copy it. |
---|
915 | * Deprecated. Here for compatibility only. |
---|
916 | */ |
---|
917 | $id = $result; |
---|
918 | $got_string = false; |
---|
919 | } |
---|
920 | |
---|
921 | if (!is_resource($id)) { |
---|
922 | return $this->pgsqlRaiseError(DB_ERROR_NEED_MORE_DATA); |
---|
923 | } |
---|
924 | |
---|
925 | if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
---|
926 | $case_func = 'strtolower'; |
---|
927 | } else { |
---|
928 | $case_func = 'strval'; |
---|
929 | } |
---|
930 | |
---|
931 | $count = @pg_numfields($id); |
---|
932 | $res = array(); |
---|
933 | |
---|
934 | if ($mode) { |
---|
935 | $res['num_fields'] = $count; |
---|
936 | } |
---|
937 | |
---|
938 | for ($i = 0; $i < $count; $i++) { |
---|
939 | $res[$i] = array( |
---|
940 | 'table' => $got_string ? $case_func($result) : '', |
---|
941 | 'name' => $case_func(@pg_fieldname($id, $i)), |
---|
942 | 'type' => @pg_fieldtype($id, $i), |
---|
943 | 'len' => @pg_fieldsize($id, $i), |
---|
944 | 'flags' => $got_string |
---|
945 | ? $this->_pgFieldFlags($id, $i, $result) |
---|
946 | : '', |
---|
947 | ); |
---|
948 | if ($mode & DB_TABLEINFO_ORDER) { |
---|
949 | $res['order'][$res[$i]['name']] = $i; |
---|
950 | } |
---|
951 | if ($mode & DB_TABLEINFO_ORDERTABLE) { |
---|
952 | $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
---|
953 | } |
---|
954 | } |
---|
955 | |
---|
956 | // free the result only if we were called on a table |
---|
957 | if ($got_string) { |
---|
958 | @pg_freeresult($id); |
---|
959 | } |
---|
960 | return $res; |
---|
961 | } |
---|
962 | |
---|
963 | // }}} |
---|
964 | // {{{ _pgFieldFlags() |
---|
965 | |
---|
966 | /** |
---|
967 | * Get a column's flags |
---|
968 | * |
---|
969 | * Supports "not_null", "default_value", "primary_key", "unique_key" |
---|
970 | * and "multiple_key". The default value is passed through |
---|
971 | * rawurlencode() in case there are spaces in it. |
---|
972 | * |
---|
973 | * @param int $resource the PostgreSQL result identifier |
---|
974 | * @param int $num_field the field number |
---|
975 | * |
---|
976 | * @return string the flags |
---|
977 | * |
---|
978 | * @access private |
---|
979 | */ |
---|
980 | function _pgFieldFlags($resource, $num_field, $table_name) |
---|
981 | { |
---|
982 | $field_name = @pg_fieldname($resource, $num_field); |
---|
983 | |
---|
984 | // Check if there's a schema in $table_name and update things |
---|
985 | // accordingly. |
---|
986 | $from = 'pg_attribute f, pg_class tab, pg_type typ'; |
---|
987 | if (strpos($table_name, '.') !== false) { |
---|
988 | $from .= ', pg_namespace nsp'; |
---|
989 | list($schema, $table) = explode('.', $table_name); |
---|
990 | $tableWhere = "tab.relname = '$table' AND tab.relnamespace = nsp.oid AND nsp.nspname = '$schema'"; |
---|
991 | } else { |
---|
992 | $tableWhere = "tab.relname = '$table_name'"; |
---|
993 | } |
---|
994 | |
---|
995 | $result = @pg_exec($this->connection, "SELECT f.attnotnull, f.atthasdef |
---|
996 | FROM $from |
---|
997 | WHERE tab.relname = typ.typname |
---|
998 | AND typ.typrelid = f.attrelid |
---|
999 | AND f.attname = '$field_name' |
---|
1000 | AND $tableWhere"); |
---|
1001 | if (@pg_numrows($result) > 0) { |
---|
1002 | $row = @pg_fetch_row($result, 0); |
---|
1003 | $flags = ($row[0] == 't') ? 'not_null ' : ''; |
---|
1004 | |
---|
1005 | if ($row[1] == 't') { |
---|
1006 | $result = @pg_exec($this->connection, "SELECT a.adsrc |
---|
1007 | FROM $from, pg_attrdef a |
---|
1008 | WHERE tab.relname = typ.typname AND typ.typrelid = f.attrelid |
---|
1009 | AND f.attrelid = a.adrelid AND f.attname = '$field_name' |
---|
1010 | AND $tableWhere AND f.attnum = a.adnum"); |
---|
1011 | $row = @pg_fetch_row($result, 0); |
---|
1012 | $num = preg_replace("/'(.*)'::\w+/", "\\1", $row[0]); |
---|
1013 | $flags .= 'default_' . rawurlencode($num) . ' '; |
---|
1014 | } |
---|
1015 | } else { |
---|
1016 | $flags = ''; |
---|
1017 | } |
---|
1018 | $result = @pg_exec($this->connection, "SELECT i.indisunique, i.indisprimary, i.indkey |
---|
1019 | FROM $from, pg_index i |
---|
1020 | WHERE tab.relname = typ.typname |
---|
1021 | AND typ.typrelid = f.attrelid |
---|
1022 | AND f.attrelid = i.indrelid |
---|
1023 | AND f.attname = '$field_name' |
---|
1024 | AND $tableWhere"); |
---|
1025 | $count = @pg_numrows($result); |
---|
1026 | |
---|
1027 | for ($i = 0; $i < $count ; $i++) { |
---|
1028 | $row = @pg_fetch_row($result, $i); |
---|
1029 | $keys = explode(' ', $row[2]); |
---|
1030 | |
---|
1031 | if (in_array($num_field + 1, $keys)) { |
---|
1032 | $flags .= ($row[0] == 't' && $row[1] == 'f') ? 'unique_key ' : ''; |
---|
1033 | $flags .= ($row[1] == 't') ? 'primary_key ' : ''; |
---|
1034 | if (count($keys) > 1) |
---|
1035 | $flags .= 'multiple_key '; |
---|
1036 | } |
---|
1037 | } |
---|
1038 | |
---|
1039 | return trim($flags); |
---|
1040 | } |
---|
1041 | |
---|
1042 | // }}} |
---|
1043 | // {{{ getSpecialQuery() |
---|
1044 | |
---|
1045 | /** |
---|
1046 | * Obtains the query string needed for listing a given type of objects |
---|
1047 | * |
---|
1048 | * @param string $type the kind of objects you want to retrieve |
---|
1049 | * |
---|
1050 | * @return string the SQL query string or null if the driver doesn't |
---|
1051 | * support the object type requested |
---|
1052 | * |
---|
1053 | * @access protected |
---|
1054 | * @see DB_common::getListOf() |
---|
1055 | */ |
---|
1056 | function getSpecialQuery($type) |
---|
1057 | { |
---|
1058 | switch ($type) { |
---|
1059 | case 'tables': |
---|
1060 | return 'SELECT c.relname AS "Name"' |
---|
1061 | . ' FROM pg_class c, pg_user u' |
---|
1062 | . ' WHERE c.relowner = u.usesysid' |
---|
1063 | . " AND c.relkind = 'r'" |
---|
1064 | . ' AND NOT EXISTS' |
---|
1065 | . ' (SELECT 1 FROM pg_views' |
---|
1066 | . ' WHERE viewname = c.relname)' |
---|
1067 | . " AND c.relname !~ '^(pg_|sql_)'" |
---|
1068 | . ' UNION' |
---|
1069 | . ' SELECT c.relname AS "Name"' |
---|
1070 | . ' FROM pg_class c' |
---|
1071 | . " WHERE c.relkind = 'r'" |
---|
1072 | . ' AND NOT EXISTS' |
---|
1073 | . ' (SELECT 1 FROM pg_views' |
---|
1074 | . ' WHERE viewname = c.relname)' |
---|
1075 | . ' AND NOT EXISTS' |
---|
1076 | . ' (SELECT 1 FROM pg_user' |
---|
1077 | . ' WHERE usesysid = c.relowner)' |
---|
1078 | . " AND c.relname !~ '^pg_'"; |
---|
1079 | case 'schema.tables': |
---|
1080 | return "SELECT schemaname || '.' || tablename" |
---|
1081 | . ' AS "Name"' |
---|
1082 | . ' FROM pg_catalog.pg_tables' |
---|
1083 | . ' WHERE schemaname NOT IN' |
---|
1084 | . " ('pg_catalog', 'information_schema', 'pg_toast')"; |
---|
1085 | case 'schema.views': |
---|
1086 | return "SELECT schemaname || '.' || viewname from pg_views WHERE schemaname" |
---|
1087 | . " NOT IN ('information_schema', 'pg_catalog')"; |
---|
1088 | case 'views': |
---|
1089 | // Table cols: viewname | viewowner | definition |
---|
1090 | return 'SELECT viewname from pg_views WHERE schemaname' |
---|
1091 | . " NOT IN ('information_schema', 'pg_catalog')"; |
---|
1092 | case 'users': |
---|
1093 | // cols: usename |usesysid|usecreatedb|usetrace|usesuper|usecatupd|passwd |valuntil |
---|
1094 | return 'SELECT usename FROM pg_user'; |
---|
1095 | case 'databases': |
---|
1096 | return 'SELECT datname FROM pg_database'; |
---|
1097 | case 'functions': |
---|
1098 | case 'procedures': |
---|
1099 | return 'SELECT proname FROM pg_proc WHERE proowner <> 1'; |
---|
1100 | default: |
---|
1101 | return null; |
---|
1102 | } |
---|
1103 | } |
---|
1104 | |
---|
1105 | // }}} |
---|
1106 | // {{{ _checkManip() |
---|
1107 | |
---|
1108 | /** |
---|
1109 | * Checks if the given query is a manipulation query. This also takes into |
---|
1110 | * account the _next_query_manip flag and sets the _last_query_manip flag |
---|
1111 | * (and resets _next_query_manip) according to the result. |
---|
1112 | * |
---|
1113 | * @param string The query to check. |
---|
1114 | * |
---|
1115 | * @return boolean true if the query is a manipulation query, false |
---|
1116 | * otherwise |
---|
1117 | * |
---|
1118 | * @access protected |
---|
1119 | */ |
---|
1120 | function _checkManip($query) |
---|
1121 | { |
---|
1122 | return (preg_match('/^\s*(SAVEPOINT|RELEASE)\s+/i', $query) |
---|
1123 | || parent::_checkManip($query)); |
---|
1124 | } |
---|
1125 | |
---|
1126 | } |
---|
1127 | |
---|
1128 | /* |
---|
1129 | * Local variables: |
---|
1130 | * tab-width: 4 |
---|
1131 | * c-basic-offset: 4 |
---|
1132 | * End: |
---|
1133 | */ |
---|
1134 | |
---|
1135 | ?> |
---|