1 | <?php |
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2 | /* |
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3 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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4 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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5 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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6 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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7 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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8 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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9 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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10 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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11 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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12 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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13 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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14 | * |
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15 | * This software consists of voluntary contributions made by many individuals |
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16 | * and is licensed under the LGPL. For more information, see |
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17 | * <http://www.doctrine-project.org>. |
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18 | */ |
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19 | |
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20 | namespace Doctrine\DBAL\Platforms; |
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21 | |
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22 | use Doctrine\DBAL\DBALException; |
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23 | |
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24 | /** |
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25 | * The SqlitePlatform class describes the specifics and dialects of the SQLite |
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26 | * database platform. |
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27 | * |
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28 | * @since 2.0 |
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29 | * @author Roman Borschel <roman@code-factory.org> |
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30 | * @author Benjamin Eberlei <kontakt@beberlei.de> |
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31 | * @todo Rename: SQLitePlatform |
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32 | */ |
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33 | class SqlitePlatform extends AbstractPlatform |
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34 | { |
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35 | /** |
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36 | * returns the regular expression operator |
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37 | * |
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38 | * @return string |
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39 | * @override |
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40 | */ |
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41 | public function getRegexpExpression() |
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42 | { |
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43 | return 'RLIKE'; |
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44 | } |
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45 | |
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46 | /** |
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47 | * Return string to call a variable with the current timestamp inside an SQL statement |
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48 | * There are three special variables for current date and time. |
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49 | * |
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50 | * @return string sqlite function as string |
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51 | * @override |
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52 | */ |
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53 | public function getNowExpression($type = 'timestamp') |
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54 | { |
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55 | switch ($type) { |
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56 | case 'time': |
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57 | return 'time(\'now\')'; |
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58 | case 'date': |
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59 | return 'date(\'now\')'; |
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60 | case 'timestamp': |
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61 | default: |
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62 | return 'datetime(\'now\')'; |
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63 | } |
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64 | } |
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65 | |
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66 | /** |
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67 | * Trim a string, leading/trailing/both and with a given char which defaults to space. |
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68 | * |
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69 | * @param string $str |
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70 | * @param int $pos |
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71 | * @param string $char |
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72 | * @return string |
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73 | */ |
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74 | public function getTrimExpression($str, $pos = self::TRIM_UNSPECIFIED, $char = false) |
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75 | { |
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76 | $trimFn = ''; |
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77 | $trimChar = ($char != false) ? (', ' . $char) : ''; |
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78 | |
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79 | if ($pos == self::TRIM_LEADING) { |
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80 | $trimFn = 'LTRIM'; |
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81 | } else if($pos == self::TRIM_TRAILING) { |
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82 | $trimFn = 'RTRIM'; |
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83 | } else { |
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84 | $trimFn = 'TRIM'; |
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85 | } |
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86 | |
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87 | return $trimFn . '(' . $str . $trimChar . ')'; |
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88 | } |
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89 | |
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90 | /** |
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91 | * return string to call a function to get a substring inside an SQL statement |
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92 | * |
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93 | * Note: Not SQL92, but common functionality. |
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94 | * |
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95 | * SQLite only supports the 2 parameter variant of this function |
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96 | * |
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97 | * @param string $value an sql string literal or column name/alias |
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98 | * @param integer $position where to start the substring portion |
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99 | * @param integer $length the substring portion length |
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100 | * @return string SQL substring function with given parameters |
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101 | * @override |
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102 | */ |
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103 | public function getSubstringExpression($value, $position, $length = null) |
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104 | { |
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105 | if ($length !== null) { |
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106 | return 'SUBSTR(' . $value . ', ' . $position . ', ' . $length . ')'; |
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107 | } |
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108 | return 'SUBSTR(' . $value . ', ' . $position . ', LENGTH(' . $value . '))'; |
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109 | } |
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110 | |
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111 | /** |
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112 | * returns the position of the first occurrence of substring $substr in string $str |
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113 | * |
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114 | * @param string $substr literal string to find |
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115 | * @param string $str literal string |
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116 | * @param int $pos position to start at, beginning of string by default |
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117 | * @return integer |
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118 | */ |
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119 | public function getLocateExpression($str, $substr, $startPos = false) |
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120 | { |
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121 | if ($startPos == false) { |
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122 | return 'LOCATE('.$str.', '.$substr.')'; |
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123 | } else { |
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124 | return 'LOCATE('.$str.', '.$substr.', '.$startPos.')'; |
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125 | } |
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126 | } |
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127 | |
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128 | public function getDateDiffExpression($date1, $date2) |
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129 | { |
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130 | return 'ROUND(JULIANDAY('.$date1 . ')-JULIANDAY('.$date2.'))'; |
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131 | } |
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132 | |
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133 | public function getDateAddDaysExpression($date, $days) |
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134 | { |
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135 | return "DATE(" . $date . ",'+". $days . " day')"; |
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136 | } |
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137 | |
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138 | public function getDateSubDaysExpression($date, $days) |
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139 | { |
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140 | return "DATE(" . $date . ",'-". $days . " day')"; |
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141 | } |
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142 | |
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143 | public function getDateAddMonthExpression($date, $months) |
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144 | { |
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145 | return "DATE(" . $date . ",'+". $months . " month')"; |
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146 | } |
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147 | |
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148 | public function getDateSubMonthExpression($date, $months) |
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149 | { |
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150 | return "DATE(" . $date . ",'-". $months . " month')"; |
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151 | } |
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152 | |
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153 | protected function _getTransactionIsolationLevelSQL($level) |
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154 | { |
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155 | switch ($level) { |
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156 | case \Doctrine\DBAL\Connection::TRANSACTION_READ_UNCOMMITTED: |
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157 | return 0; |
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158 | case \Doctrine\DBAL\Connection::TRANSACTION_READ_COMMITTED: |
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159 | case \Doctrine\DBAL\Connection::TRANSACTION_REPEATABLE_READ: |
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160 | case \Doctrine\DBAL\Connection::TRANSACTION_SERIALIZABLE: |
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161 | return 1; |
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162 | default: |
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163 | return parent::_getTransactionIsolationLevelSQL($level); |
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164 | } |
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165 | } |
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166 | |
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167 | public function getSetTransactionIsolationSQL($level) |
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168 | { |
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169 | return 'PRAGMA read_uncommitted = ' . $this->_getTransactionIsolationLevelSQL($level); |
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170 | } |
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171 | |
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172 | /** |
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173 | * @override |
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174 | */ |
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175 | public function prefersIdentityColumns() |
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176 | { |
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177 | return true; |
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178 | } |
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179 | |
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180 | /** |
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181 | * @override |
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182 | */ |
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183 | public function getBooleanTypeDeclarationSQL(array $field) |
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184 | { |
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185 | return 'BOOLEAN'; |
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186 | } |
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187 | |
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188 | /** |
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189 | * @override |
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190 | */ |
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191 | public function getIntegerTypeDeclarationSQL(array $field) |
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192 | { |
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193 | return $this->_getCommonIntegerTypeDeclarationSQL($field); |
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194 | } |
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195 | |
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196 | /** |
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197 | * @override |
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198 | */ |
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199 | public function getBigIntTypeDeclarationSQL(array $field) |
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200 | { |
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201 | return $this->_getCommonIntegerTypeDeclarationSQL($field); |
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202 | } |
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203 | |
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204 | /** |
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205 | * @override |
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206 | */ |
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207 | public function getTinyIntTypeDeclarationSql(array $field) |
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208 | { |
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209 | return $this->_getCommonIntegerTypeDeclarationSQL($field); |
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210 | } |
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211 | |
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212 | /** |
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213 | * @override |
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214 | */ |
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215 | public function getSmallIntTypeDeclarationSQL(array $field) |
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216 | { |
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217 | return $this->_getCommonIntegerTypeDeclarationSQL($field); |
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218 | } |
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219 | |
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220 | /** |
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221 | * @override |
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222 | */ |
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223 | public function getMediumIntTypeDeclarationSql(array $field) |
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224 | { |
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225 | return $this->_getCommonIntegerTypeDeclarationSQL($field); |
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226 | } |
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227 | |
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228 | /** |
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229 | * @override |
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230 | */ |
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231 | public function getDateTimeTypeDeclarationSQL(array $fieldDeclaration) |
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232 | { |
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233 | return 'DATETIME'; |
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234 | } |
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235 | |
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236 | /** |
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237 | * @override |
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238 | */ |
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239 | public function getDateTypeDeclarationSQL(array $fieldDeclaration) |
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240 | { |
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241 | return 'DATE'; |
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242 | } |
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243 | |
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244 | /** |
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245 | * @override |
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246 | */ |
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247 | public function getTimeTypeDeclarationSQL(array $fieldDeclaration) |
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248 | { |
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249 | return 'TIME'; |
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250 | } |
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251 | |
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252 | /** |
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253 | * @override |
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254 | */ |
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255 | protected function _getCommonIntegerTypeDeclarationSQL(array $columnDef) |
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256 | { |
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257 | return 'INTEGER'; |
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258 | } |
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259 | |
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260 | /** |
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261 | * create a new table |
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262 | * |
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263 | * @param string $name Name of the database that should be created |
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264 | * @param array $fields Associative array that contains the definition of each field of the new table |
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265 | * The indexes of the array entries are the names of the fields of the table an |
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266 | * the array entry values are associative arrays like those that are meant to be |
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267 | * passed with the field definitions to get[Type]Declaration() functions. |
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268 | * array( |
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269 | * 'id' => array( |
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270 | * 'type' => 'integer', |
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271 | * 'unsigned' => 1 |
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272 | * 'notnull' => 1 |
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273 | * 'default' => 0 |
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274 | * ), |
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275 | * 'name' => array( |
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276 | * 'type' => 'text', |
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277 | * 'length' => 12 |
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278 | * ), |
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279 | * 'password' => array( |
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280 | * 'type' => 'text', |
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281 | * 'length' => 12 |
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282 | * ) |
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283 | * ); |
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284 | * @param array $options An associative array of table options: |
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285 | * |
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286 | * @return void |
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287 | * @override |
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288 | */ |
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289 | protected function _getCreateTableSQL($name, array $columns, array $options = array()) |
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290 | { |
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291 | $name = str_replace(".", "__", $name); |
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292 | $queryFields = $this->getColumnDeclarationListSQL($columns); |
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293 | |
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294 | if (isset($options['primary']) && ! empty($options['primary'])) { |
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295 | $keyColumns = array_unique(array_values($options['primary'])); |
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296 | $keyColumns = array_map(array($this, 'quoteIdentifier'), $keyColumns); |
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297 | $queryFields.= ', PRIMARY KEY('.implode(', ', $keyColumns).')'; |
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298 | } |
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299 | |
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300 | $query[] = 'CREATE TABLE ' . $name . ' (' . $queryFields . ')'; |
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301 | |
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302 | if (isset($options['indexes']) && ! empty($options['indexes'])) { |
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303 | foreach ($options['indexes'] as $index => $indexDef) { |
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304 | $query[] = $this->getCreateIndexSQL($indexDef, $name); |
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305 | } |
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306 | } |
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307 | if (isset($options['unique']) && ! empty($options['unique'])) { |
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308 | foreach ($options['unique'] as $index => $indexDef) { |
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309 | $query[] = $this->getCreateIndexSQL($indexDef, $name); |
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310 | } |
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311 | } |
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312 | return $query; |
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313 | } |
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314 | |
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315 | /** |
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316 | * {@inheritdoc} |
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317 | */ |
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318 | protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed) |
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319 | { |
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320 | return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)') |
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321 | : ($length ? 'VARCHAR(' . $length . ')' : 'TEXT'); |
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322 | } |
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323 | |
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324 | public function getClobTypeDeclarationSQL(array $field) |
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325 | { |
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326 | return 'CLOB'; |
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327 | } |
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328 | |
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329 | public function getListTableConstraintsSQL($table) |
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330 | { |
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331 | $table = str_replace(".", "__", $table); |
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332 | return "SELECT sql FROM sqlite_master WHERE type='index' AND tbl_name = '$table' AND sql NOT NULL ORDER BY name"; |
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333 | } |
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334 | |
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335 | public function getListTableColumnsSQL($table, $currentDatabase = null) |
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336 | { |
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337 | $table = str_replace(".", "__", $table); |
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338 | return "PRAGMA table_info($table)"; |
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339 | } |
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340 | |
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341 | public function getListTableIndexesSQL($table, $currentDatabase = null) |
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342 | { |
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343 | $table = str_replace(".", "__", $table); |
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344 | return "PRAGMA index_list($table)"; |
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345 | } |
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346 | |
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347 | public function getListTablesSQL() |
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348 | { |
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349 | return "SELECT name FROM sqlite_master WHERE type = 'table' AND name != 'sqlite_sequence' AND name != 'geometry_columns' AND name != 'spatial_ref_sys' " |
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350 | . "UNION ALL SELECT name FROM sqlite_temp_master " |
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351 | . "WHERE type = 'table' ORDER BY name"; |
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352 | } |
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353 | |
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354 | public function getListViewsSQL($database) |
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355 | { |
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356 | return "SELECT name, sql FROM sqlite_master WHERE type='view' AND sql NOT NULL"; |
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357 | } |
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358 | |
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359 | public function getCreateViewSQL($name, $sql) |
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360 | { |
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361 | return 'CREATE VIEW ' . $name . ' AS ' . $sql; |
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362 | } |
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363 | |
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364 | public function getDropViewSQL($name) |
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365 | { |
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366 | return 'DROP VIEW '. $name; |
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367 | } |
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368 | |
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369 | /** |
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370 | * SQLite does support foreign key constraints, but only in CREATE TABLE statements... |
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371 | * This really limits their usefulness and requires SQLite specific handling, so |
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372 | * we simply say that SQLite does NOT support foreign keys for now... |
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373 | * |
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374 | * @return boolean FALSE |
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375 | * @override |
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376 | */ |
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377 | public function supportsForeignKeyConstraints() |
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378 | { |
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379 | return false; |
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380 | } |
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381 | |
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382 | public function supportsAlterTable() |
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383 | { |
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384 | return false; |
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385 | } |
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386 | |
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387 | public function supportsIdentityColumns() |
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388 | { |
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389 | return true; |
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390 | } |
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391 | |
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392 | /** |
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393 | * Get the platform name for this instance |
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394 | * |
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395 | * @return string |
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396 | */ |
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397 | public function getName() |
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398 | { |
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399 | return 'sqlite'; |
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400 | } |
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401 | |
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402 | /** |
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403 | * @inheritdoc |
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404 | */ |
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405 | public function getTruncateTableSQL($tableName, $cascade = false) |
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406 | { |
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407 | $tableName = str_replace(".", "__", $tableName); |
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408 | return 'DELETE FROM '.$tableName; |
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409 | } |
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410 | |
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411 | /** |
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412 | * User-defined function for Sqlite that is used with PDO::sqliteCreateFunction() |
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413 | * |
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414 | * @param int|float $value |
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415 | * @return float |
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416 | */ |
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417 | static public function udfSqrt($value) |
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418 | { |
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419 | return sqrt($value); |
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420 | } |
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421 | |
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422 | /** |
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423 | * User-defined function for Sqlite that implements MOD(a, b) |
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424 | */ |
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425 | static public function udfMod($a, $b) |
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426 | { |
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427 | return ($a % $b); |
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428 | } |
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429 | |
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430 | /** |
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431 | * @param string $str |
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432 | * @param string $substr |
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433 | * @param int $offset |
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434 | */ |
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435 | static public function udfLocate($str, $substr, $offset = 0) |
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436 | { |
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437 | $pos = strpos($str, $substr, $offset); |
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438 | if ($pos !== false) { |
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439 | return $pos+1; |
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440 | } |
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441 | return 0; |
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442 | } |
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443 | |
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444 | public function getForUpdateSql() |
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445 | { |
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446 | return ''; |
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447 | } |
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448 | |
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449 | protected function initializeDoctrineTypeMappings() |
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450 | { |
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451 | $this->doctrineTypeMapping = array( |
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452 | 'boolean' => 'boolean', |
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453 | 'tinyint' => 'boolean', |
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454 | 'smallint' => 'smallint', |
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455 | 'mediumint' => 'integer', |
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456 | 'int' => 'integer', |
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457 | 'integer' => 'integer', |
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458 | 'serial' => 'integer', |
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459 | 'bigint' => 'bigint', |
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460 | 'bigserial' => 'bigint', |
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461 | 'clob' => 'text', |
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462 | 'tinytext' => 'text', |
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463 | 'mediumtext' => 'text', |
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464 | 'longtext' => 'text', |
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465 | 'text' => 'text', |
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466 | 'varchar' => 'string', |
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467 | 'longvarchar' => 'string', |
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468 | 'varchar2' => 'string', |
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469 | 'nvarchar' => 'string', |
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470 | 'image' => 'string', |
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471 | 'ntext' => 'string', |
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472 | 'char' => 'string', |
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473 | 'date' => 'date', |
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474 | 'datetime' => 'datetime', |
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475 | 'timestamp' => 'datetime', |
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476 | 'time' => 'time', |
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477 | 'float' => 'float', |
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478 | 'double' => 'float', |
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479 | 'double precision' => 'float', |
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480 | 'real' => 'float', |
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481 | 'decimal' => 'decimal', |
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482 | 'numeric' => 'decimal', |
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483 | 'blob' => 'blob', |
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484 | ); |
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485 | } |
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486 | |
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487 | protected function getReservedKeywordsClass() |
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488 | { |
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489 | return 'Doctrine\DBAL\Platforms\Keywords\SQLiteKeywords'; |
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490 | } |
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491 | |
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492 | /** |
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493 | * Gets the SQL Snippet used to declare a BLOB column type. |
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494 | */ |
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495 | public function getBlobTypeDeclarationSQL(array $field) |
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496 | { |
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497 | return 'BLOB'; |
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498 | } |
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499 | |
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500 | public function getTemporaryTableName($tableName) |
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501 | { |
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502 | $tableName = str_replace(".", "__", $tableName); |
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503 | return $tableName; |
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504 | } |
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505 | |
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506 | /** |
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507 | * Sqlite Platform emulates schema by underscoring each dot and generating tables |
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508 | * into the default database. |
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509 | * |
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510 | * This hack is implemented to be able to use SQLite as testdriver when |
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511 | * using schema supporting databases. |
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512 | * |
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513 | * @return bool |
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514 | */ |
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515 | public function canEmulateSchemas() |
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516 | { |
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517 | return true; |
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518 | } |
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519 | } |
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