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1 <?php |
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2 /** |
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3 * Zend Framework |
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4 * |
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5 * LICENSE |
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6 * |
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7 * This source file is subject to the new BSD license that is bundled |
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8 * with this package in the file LICENSE.txt. |
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9 * It is also available through the world-wide-web at this URL: |
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10 * http://framework.zend.com/license/new-bsd |
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11 * If you did not receive a copy of the license and are unable to |
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12 * obtain it through the world-wide-web, please send an email |
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13 * to license@zend.com so we can send you a copy immediately. |
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14 * |
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15 * @category Zend |
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16 * @package Zend_Db |
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17 * @subpackage Adapter |
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18 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
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19 * @license http://framework.zend.com/license/new-bsd New BSD License |
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20 * @version $Id: Mysql.php 20096 2010-01-06 02:05:09Z bkarwin $ |
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21 */ |
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22 |
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23 |
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24 /** |
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25 * @see Zend_Db_Adapter_Pdo_Abstract |
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26 */ |
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27 require_once 'Zend/Db/Adapter/Pdo/Abstract.php'; |
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28 |
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29 |
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30 /** |
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31 * Class for connecting to MySQL databases and performing common operations. |
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32 * |
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33 * @category Zend |
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34 * @package Zend_Db |
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35 * @subpackage Adapter |
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36 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
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37 * @license http://framework.zend.com/license/new-bsd New BSD License |
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38 */ |
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39 class Zend_Db_Adapter_Pdo_Mysql extends Zend_Db_Adapter_Pdo_Abstract |
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40 { |
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41 |
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42 /** |
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43 * PDO type. |
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44 * |
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45 * @var string |
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46 */ |
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47 protected $_pdoType = 'mysql'; |
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48 |
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49 /** |
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50 * Keys are UPPERCASE SQL datatypes or the constants |
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51 * Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE. |
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52 * |
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53 * Values are: |
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54 * 0 = 32-bit integer |
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55 * 1 = 64-bit integer |
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56 * 2 = float or decimal |
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57 * |
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58 * @var array Associative array of datatypes to values 0, 1, or 2. |
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59 */ |
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60 protected $_numericDataTypes = array( |
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61 Zend_Db::INT_TYPE => Zend_Db::INT_TYPE, |
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62 Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE, |
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63 Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE, |
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64 'INT' => Zend_Db::INT_TYPE, |
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65 'INTEGER' => Zend_Db::INT_TYPE, |
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66 'MEDIUMINT' => Zend_Db::INT_TYPE, |
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67 'SMALLINT' => Zend_Db::INT_TYPE, |
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68 'TINYINT' => Zend_Db::INT_TYPE, |
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69 'BIGINT' => Zend_Db::BIGINT_TYPE, |
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70 'SERIAL' => Zend_Db::BIGINT_TYPE, |
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71 'DEC' => Zend_Db::FLOAT_TYPE, |
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72 'DECIMAL' => Zend_Db::FLOAT_TYPE, |
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73 'DOUBLE' => Zend_Db::FLOAT_TYPE, |
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74 'DOUBLE PRECISION' => Zend_Db::FLOAT_TYPE, |
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75 'FIXED' => Zend_Db::FLOAT_TYPE, |
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76 'FLOAT' => Zend_Db::FLOAT_TYPE |
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77 ); |
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78 |
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79 /** |
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80 * Creates a PDO object and connects to the database. |
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81 * |
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82 * @return void |
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83 * @throws Zend_Db_Adapter_Exception |
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84 */ |
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85 protected function _connect() |
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86 { |
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87 if ($this->_connection) { |
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88 return; |
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89 } |
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90 |
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91 if (!empty($this->_config['charset'])) { |
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92 $initCommand = "SET NAMES '" . $this->_config['charset'] . "'"; |
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93 $this->_config['driver_options'][1002] = $initCommand; // 1002 = PDO::MYSQL_ATTR_INIT_COMMAND |
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94 } |
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95 |
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96 parent::_connect(); |
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97 } |
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98 |
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99 /** |
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100 * @return string |
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101 */ |
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102 public function getQuoteIdentifierSymbol() |
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103 { |
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104 return "`"; |
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105 } |
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106 |
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107 /** |
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108 * Returns a list of the tables in the database. |
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109 * |
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110 * @return array |
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111 */ |
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112 public function listTables() |
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113 { |
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114 return $this->fetchCol('SHOW TABLES'); |
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115 } |
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116 |
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117 /** |
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118 * Returns the column descriptions for a table. |
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119 * |
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120 * The return value is an associative array keyed by the column name, |
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121 * as returned by the RDBMS. |
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122 * |
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123 * The value of each array element is an associative array |
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124 * with the following keys: |
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125 * |
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126 * SCHEMA_NAME => string; name of database or schema |
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127 * TABLE_NAME => string; |
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128 * COLUMN_NAME => string; column name |
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129 * COLUMN_POSITION => number; ordinal position of column in table |
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130 * DATA_TYPE => string; SQL datatype name of column |
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131 * DEFAULT => string; default expression of column, null if none |
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132 * NULLABLE => boolean; true if column can have nulls |
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133 * LENGTH => number; length of CHAR/VARCHAR |
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134 * SCALE => number; scale of NUMERIC/DECIMAL |
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135 * PRECISION => number; precision of NUMERIC/DECIMAL |
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136 * UNSIGNED => boolean; unsigned property of an integer type |
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137 * PRIMARY => boolean; true if column is part of the primary key |
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138 * PRIMARY_POSITION => integer; position of column in primary key |
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139 * IDENTITY => integer; true if column is auto-generated with unique values |
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140 * |
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141 * @param string $tableName |
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142 * @param string $schemaName OPTIONAL |
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143 * @return array |
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144 */ |
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145 public function describeTable($tableName, $schemaName = null) |
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146 { |
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147 // @todo use INFORMATION_SCHEMA someday when MySQL's |
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148 // implementation has reasonably good performance and |
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149 // the version with this improvement is in wide use. |
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150 |
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151 if ($schemaName) { |
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152 $sql = 'DESCRIBE ' . $this->quoteIdentifier("$schemaName.$tableName", true); |
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153 } else { |
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154 $sql = 'DESCRIBE ' . $this->quoteIdentifier($tableName, true); |
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155 } |
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156 $stmt = $this->query($sql); |
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157 |
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158 // Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection |
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159 $result = $stmt->fetchAll(Zend_Db::FETCH_NUM); |
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160 |
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161 $field = 0; |
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162 $type = 1; |
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163 $null = 2; |
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164 $key = 3; |
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165 $default = 4; |
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166 $extra = 5; |
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167 |
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168 $desc = array(); |
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169 $i = 1; |
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170 $p = 1; |
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171 foreach ($result as $row) { |
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172 list($length, $scale, $precision, $unsigned, $primary, $primaryPosition, $identity) |
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173 = array(null, null, null, null, false, null, false); |
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174 if (preg_match('/unsigned/', $row[$type])) { |
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175 $unsigned = true; |
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176 } |
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177 if (preg_match('/^((?:var)?char)\((\d+)\)/', $row[$type], $matches)) { |
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178 $row[$type] = $matches[1]; |
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179 $length = $matches[2]; |
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180 } else if (preg_match('/^decimal\((\d+),(\d+)\)/', $row[$type], $matches)) { |
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181 $row[$type] = 'decimal'; |
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182 $precision = $matches[1]; |
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183 $scale = $matches[2]; |
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184 } else if (preg_match('/^float\((\d+),(\d+)\)/', $row[$type], $matches)) { |
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185 $row[$type] = 'float'; |
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186 $precision = $matches[1]; |
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187 $scale = $matches[2]; |
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188 } else if (preg_match('/^((?:big|medium|small|tiny)?int)\((\d+)\)/', $row[$type], $matches)) { |
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189 $row[$type] = $matches[1]; |
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190 // The optional argument of a MySQL int type is not precision |
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191 // or length; it is only a hint for display width. |
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192 } |
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193 if (strtoupper($row[$key]) == 'PRI') { |
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194 $primary = true; |
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195 $primaryPosition = $p; |
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196 if ($row[$extra] == 'auto_increment') { |
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197 $identity = true; |
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198 } else { |
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199 $identity = false; |
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200 } |
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201 ++$p; |
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202 } |
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203 $desc[$this->foldCase($row[$field])] = array( |
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204 'SCHEMA_NAME' => null, // @todo |
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205 'TABLE_NAME' => $this->foldCase($tableName), |
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206 'COLUMN_NAME' => $this->foldCase($row[$field]), |
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207 'COLUMN_POSITION' => $i, |
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208 'DATA_TYPE' => $row[$type], |
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209 'DEFAULT' => $row[$default], |
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210 'NULLABLE' => (bool) ($row[$null] == 'YES'), |
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211 'LENGTH' => $length, |
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212 'SCALE' => $scale, |
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213 'PRECISION' => $precision, |
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214 'UNSIGNED' => $unsigned, |
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215 'PRIMARY' => $primary, |
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216 'PRIMARY_POSITION' => $primaryPosition, |
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217 'IDENTITY' => $identity |
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218 ); |
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219 ++$i; |
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220 } |
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221 return $desc; |
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222 } |
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223 |
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224 /** |
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225 * Adds an adapter-specific LIMIT clause to the SELECT statement. |
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226 * |
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227 * @param string $sql |
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228 * @param integer $count |
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229 * @param integer $offset OPTIONAL |
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230 * @throws Zend_Db_Adapter_Exception |
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231 * @return string |
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232 */ |
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233 public function limit($sql, $count, $offset = 0) |
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234 { |
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235 $count = intval($count); |
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236 if ($count <= 0) { |
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237 /** @see Zend_Db_Adapter_Exception */ |
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238 require_once 'Zend/Db/Adapter/Exception.php'; |
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239 throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid"); |
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240 } |
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241 |
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242 $offset = intval($offset); |
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243 if ($offset < 0) { |
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244 /** @see Zend_Db_Adapter_Exception */ |
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245 require_once 'Zend/Db/Adapter/Exception.php'; |
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246 throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid"); |
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247 } |
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248 |
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249 $sql .= " LIMIT $count"; |
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250 if ($offset > 0) { |
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251 $sql .= " OFFSET $offset"; |
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252 } |
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253 |
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254 return $sql; |
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255 } |
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256 |
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257 } |