| 1 | <?php |
| 2 | namespace wcf\system\database\editor; |
| 3 | use wcf\system\database\exception\DatabaseQueryExecutionException; |
| 4 | use wcf\system\database\util\PreparedStatementConditionBuilder; |
| 5 | use wcf\system\Regex; |
| 6 | |
| 7 | /** |
| 8 | * Database editor implementation for MySQL4.1 or higher. |
| 9 | * |
| 10 | * @author Marcel Werk |
| 11 | * @copyright 2001-2019 WoltLab GmbH |
| 12 | * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php> |
| 13 | * @package WoltLabSuite\Core\System\Database\Editor |
| 14 | */ |
| 15 | class MySQLDatabaseEditor extends DatabaseEditor { |
| 16 | /** |
| 17 | * @inheritDoc |
| 18 | */ |
| 19 | public function getTableNames() { |
| 20 | $existingTables = []; |
| 21 | $sql = "SHOW TABLES FROM `".$this->dbObj->getDatabaseName()."`"; |
| 22 | $statement = $this->dbObj->prepareStatement($sql); |
| 23 | $statement->execute(); |
| 24 | while ($row = $statement->fetchArray(\PDO::FETCH_NUM)) { |
| 25 | $existingTables[] = $row[0]; |
| 26 | } |
| 27 | return $existingTables; |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * @inheritDoc |
| 32 | */ |
| 33 | public function getColumns($tableName) { |
| 34 | $columns = []; |
| 35 | $regex = new Regex('([a-z]+)\((.+)\)', Regex::CASE_INSENSITIVE); |
| 36 | |
| 37 | $sql = "SHOW COLUMNS FROM `".$tableName."`"; |
| 38 | $statement = $this->dbObj->prepareStatement($sql); |
| 39 | $statement->execute(); |
| 40 | while ($row = $statement->fetchArray()) { |
| 41 | $regex->match($row['Type']); |
| 42 | $typeMatches = $regex->getMatches(); |
| 43 | |
| 44 | $type = $row['Type']; |
| 45 | $length = ''; |
| 46 | $decimals = ''; |
| 47 | $enumValues = ''; |
| 48 | if (!empty($typeMatches)) { |
| 49 | $type = $typeMatches[1]; |
| 50 | |
| 51 | switch ($type) { |
| 52 | case 'enum': |
| 53 | case 'set': |
| 54 | $enumValues = $typeMatches[2]; |
| 55 | break; |
| 56 | |
| 57 | case 'decimal': |
| 58 | case 'double': |
| 59 | case 'float': |
| 60 | $pieces = explode(',', $typeMatches[2]); |
| 61 | switch (count($pieces)) { |
| 62 | case 1: |
| 63 | $length = $pieces[0]; |
| 64 | break; |
| 65 | |
| 66 | case 2: |
| 67 | list($length, $decimals) = $pieces; |
| 68 | break; |
| 69 | } |
| 70 | |
| 71 | break; |
| 72 | |
| 73 | default: |
| 74 | if ($typeMatches[2] == (int)$typeMatches[2]) { |
| 75 | $length = $typeMatches[2]; |
| 76 | } |
| 77 | break; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | $columns[] = ['name' => $row['Field'], 'data' => [ |
| 82 | 'type' => $type, |
| 83 | 'length' => $length, |
| 84 | 'notNull' => $row['Null'] == 'YES' ? false : true, |
| 85 | 'key' => ($row['Key'] == 'PRI') ? 'PRIMARY' : (($row['Key'] == 'UNI') ? 'UNIQUE' : ''), |
| 86 | 'default' => $row['Default'], |
| 87 | 'autoIncrement' => $row['Extra'] == 'auto_increment' ? true : false, |
| 88 | 'enumValues' => $enumValues, |
| 89 | 'decimals' => $decimals |
| 90 | ]]; |
| 91 | } |
| 92 | |
| 93 | return $columns; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * @inheritDoc |
| 98 | */ |
| 99 | public function getForeignKeys($tableName) { |
| 100 | $sql = "SELECT CONSTRAINT_NAME, DELETE_RULE, UPDATE_RULE |
| 101 | FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS |
| 102 | WHERE CONSTRAINT_SCHEMA = ? |
| 103 | AND TABLE_NAME = ?"; |
| 104 | $statement = $this->dbObj->prepareStatement($sql); |
| 105 | $statement->execute([ |
| 106 | $this->dbObj->getDatabaseName(), |
| 107 | $tableName |
| 108 | ]); |
| 109 | $referentialConstraints = $statement->fetchAll(\PDO::FETCH_ASSOC); |
| 110 | |
| 111 | $validActions = ['CASCADE', 'SET NULL', 'NO ACTION']; |
| 112 | |
| 113 | $foreignKeys = []; |
| 114 | foreach ($referentialConstraints as $information) { |
| 115 | $foreignKeys[$information['CONSTRAINT_NAME']] = [ |
| 116 | 'columns' => [], |
| 117 | 'referencedColumns' => [], |
| 118 | 'ON DELETE' => in_array($information['DELETE_RULE'], $validActions) ? $information['DELETE_RULE'] : null, |
| 119 | 'ON UPDATE' => in_array($information['UPDATE_RULE'], $validActions) ? $information['UPDATE_RULE'] : null |
| 120 | ]; |
| 121 | } |
| 122 | |
| 123 | if (empty($foreignKeys)) { |
| 124 | return []; |
| 125 | } |
| 126 | |
| 127 | $conditionBuilder = new PreparedStatementConditionBuilder(); |
| 128 | $conditionBuilder->add('CONSTRAINT_NAME IN (?)', [array_keys($foreignKeys)]); |
| 129 | $conditionBuilder->add('TABLE_SCHEMA = ?', [$this->dbObj->getDatabaseName()]); |
| 130 | $conditionBuilder->add('TABLE_NAME = ?', [$tableName]); |
| 131 | |
| 132 | $sql = "SELECT CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME |
| 133 | FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE |
| 134 | " . $conditionBuilder; |
| 135 | $statement = $this->dbObj->prepareStatement($sql); |
| 136 | $statement->execute($conditionBuilder->getParameters()); |
| 137 | $keyColumnUsage = $statement->fetchAll(\PDO::FETCH_ASSOC); |
| 138 | |
| 139 | foreach ($keyColumnUsage as $information) { |
| 140 | $foreignKeys[$information['CONSTRAINT_NAME']]['columns'][] = $information['COLUMN_NAME']; |
| 141 | $foreignKeys[$information['CONSTRAINT_NAME']]['referencedColumns'][] = $information['REFERENCED_COLUMN_NAME']; |
| 142 | $foreignKeys[$information['CONSTRAINT_NAME']]['referencedTable'] = $information['REFERENCED_TABLE_NAME']; |
| 143 | } |
| 144 | |
| 145 | foreach ($foreignKeys as $keyName => $keyData) { |
| 146 | $foreignKeys[$keyName]['columns'] = array_unique($foreignKeys[$keyName]['columns']); |
| 147 | $foreignKeys[$keyName]['referencedColumns'] = array_unique($foreignKeys[$keyName]['referencedColumns']); |
| 148 | } |
| 149 | |
| 150 | return $foreignKeys; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * @inheritDoc |
| 155 | */ |
| 156 | public function getIndexInformation($tableName) { |
| 157 | $sql = "SHOW INDEX |
| 158 | FROM `".$tableName."`"; |
| 159 | $statement = $this->dbObj->prepareStatement($sql); |
| 160 | $statement->execute(); |
| 161 | $indices = $statement->fetchAll(\PDO::FETCH_ASSOC); |
| 162 | |
| 163 | $indexInformation = []; |
| 164 | foreach ($indices as $index) { |
| 165 | if (!isset($indexInformation[$index['Key_name']])) { |
| 166 | $type = null; |
| 167 | if ($index['Index_type'] === 'FULLTEXT') { |
| 168 | $type = 'FULLTEXT'; |
| 169 | } |
| 170 | else if ($index['Key_name'] === 'PRIMARY') { |
| 171 | $type = 'PRIMARY'; |
| 172 | } |
| 173 | else if ($index['Non_unique'] == 0) { |
| 174 | $type = 'UNIQUE'; |
| 175 | } |
| 176 | |
| 177 | $indexInformation[$index['Key_name']] = [ |
| 178 | 'columns' => [$index['Column_name']], |
| 179 | 'type' => $type |
| 180 | ]; |
| 181 | } |
| 182 | else { |
| 183 | $indexInformation[$index['Key_name']]['columns'][] = $index['Column_name']; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | return $indexInformation; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * @inheritDoc |
| 192 | */ |
| 193 | public function getIndices($tableName) { |
| 194 | $indices = []; |
| 195 | $sql = "SHOW INDEX FROM `".$tableName."`"; |
| 196 | $statement = $this->dbObj->prepareStatement($sql); |
| 197 | $statement->execute(); |
| 198 | while ($row = $statement->fetchArray()) { |
| 199 | $indices[] = $row['Key_name']; |
| 200 | } |
| 201 | |
| 202 | return array_unique($indices); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * @inheritDoc |
| 207 | */ |
| 208 | public function createTable($tableName, $columns, $indices = []) { |
| 209 | $columnDefinition = $indexDefinition = ''; |
| 210 | |
| 211 | // build column definition |
| 212 | foreach ($columns as $column) { |
| 213 | if (!empty($columnDefinition)) $columnDefinition .= ','; |
| 214 | $columnDefinition .= $this->buildColumnDefinition($column['name'], $column['data']); |
| 215 | } |
| 216 | |
| 217 | // build index definition |
| 218 | foreach ($indices as $index) { |
| 219 | if (!empty($indexDefinition)) $indexDefinition .= ','; |
| 220 | $indexDefinition .= $this->buildIndexDefinition($index['name'], $index['data']); |
| 221 | } |
| 222 | |
| 223 | // create table |
| 224 | $sql = "CREATE TABLE `".$tableName."` ( |
| 225 | ".$columnDefinition." |
| 226 | ".(!empty($indexDefinition) ? ',' : '')." |
| 227 | ".$indexDefinition." |
| 228 | ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci"; |
| 229 | $statement = $this->dbObj->prepareStatement($sql); |
| 230 | $statement->execute(); |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * @inheritDoc |
| 235 | */ |
| 236 | public function dropTable($tableName) { |
| 237 | $sql = "DROP TABLE IF EXISTS `".$tableName."`"; |
| 238 | $statement = $this->dbObj->prepareStatement($sql); |
| 239 | $statement->execute(); |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * @inheritDoc |
| 244 | */ |
| 245 | public function addColumn($tableName, $columnName, $columnData) { |
| 246 | $sql = "ALTER TABLE `".$tableName."` ADD COLUMN ".$this->buildColumnDefinition($columnName, $columnData); |
| 247 | $statement = $this->dbObj->prepareStatement($sql); |
| 248 | $statement->execute(); |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * @inheritDoc |
| 253 | */ |
| 254 | public function alterColumn($tableName, $oldColumnName, $newColumnName, $newColumnData) { |
| 255 | $sql = "ALTER TABLE `".$tableName."` CHANGE COLUMN `".$oldColumnName."` ".$this->buildColumnDefinition($newColumnName, $newColumnData); |
| 256 | $statement = $this->dbObj->prepareStatement($sql); |
| 257 | $statement->execute(); |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * @inheritDoc |
| 262 | */ |
| 263 | public function alterColumns($tableName, $alterData) { |
| 264 | $queries = ""; |
| 265 | foreach ($alterData as $columnName => $data) { |
| 266 | switch ($data['action']) { |
| 267 | case 'add': |
| 268 | $queries .= "ADD COLUMN {$this->buildColumnDefinition($columnName, $data['data'])},"; |
| 269 | break; |
| 270 | |
| 271 | case 'alter': |
| 272 | $newColumnName = $columnName; |
| 273 | if (isset($data['oldColumnName'])) { |
| 274 | /** |
| 275 | * @deprecated 5.4 `oldColumnName` was an incorrect name for the index |
| 276 | * that is kept for backwards compatibility for now |
| 277 | */ |
| 278 | $newColumnName = $data['oldColumnName']; |
| 279 | } |
| 280 | else if (isset($data['newColumnName'])) { |
| 281 | $newColumnName = $data['newColumnName']; |
| 282 | } |
| 283 | |
| 284 | $queries .= "CHANGE COLUMN `{$columnName}` {$this->buildColumnDefinition($newColumnName, $data['data'])},"; |
| 285 | break; |
| 286 | |
| 287 | case 'drop': |
| 288 | $queries .= "DROP COLUMN `{$columnName}`,"; |
| 289 | break; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | $this->dbObj->prepareStatement("ALTER TABLE `{$tableName}` " . rtrim($queries, ','))->execute(); |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * @inheritDoc |
| 298 | */ |
| 299 | public function dropColumn($tableName, $columnName) { |
| 300 | try { |
| 301 | $sql = "ALTER TABLE `".$tableName."` DROP COLUMN `".$columnName."`"; |
| 302 | $statement = $this->dbObj->prepareStatement($sql); |
| 303 | $statement->execute(); |
| 304 | } |
| 305 | catch (DatabaseQueryExecutionException $e) { |
| 306 | if ($e->getCode() != '42000') { |
| 307 | throw $e; |
| 308 | } |
| 309 | if (in_array($columnName, array_column($this->getColumns($tableName), 'name'))) { |
| 310 | throw $e; |
| 311 | } |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * @inheritDoc |
| 317 | */ |
| 318 | public function addIndex($tableName, $indexName, $indexData) { |
| 319 | $sql = "ALTER TABLE `".$tableName."` ADD ".$this->buildIndexDefinition($indexName, $indexData); |
| 320 | $statement = $this->dbObj->prepareStatement($sql); |
| 321 | $statement->execute(); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * @inheritDoc |
| 326 | */ |
| 327 | public function addForeignKey($tableName, $indexName, $indexData) { |
| 328 | $sql = "ALTER TABLE `".$tableName."` ADD"; |
| 329 | |
| 330 | // add index name |
| 331 | if (!empty($indexName)) $sql .= " CONSTRAINT `".$indexName."`"; |
| 332 | |
| 333 | // add columns |
| 334 | $sql .= " FOREIGN KEY (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)"; |
| 335 | |
| 336 | // add referenced table name |
| 337 | $sql .= " REFERENCES `".$indexData['referencedTable']."`"; |
| 338 | |
| 339 | // add referenced columns |
| 340 | $sql .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['referencedColumns']))."`)"; |
| 341 | |
| 342 | // add operation and action |
| 343 | if (!empty($indexData['operation'])) $sql .= " ON ".$indexData['operation']." ".$indexData['action']; |
| 344 | if (!empty($indexData['ON DELETE'])) $sql .= " ON DELETE ".$indexData['ON DELETE']; |
| 345 | if (!empty($indexData['ON UPDATE'])) $sql .= " ON UPDATE ".$indexData['ON UPDATE']; |
| 346 | |
| 347 | $statement = $this->dbObj->prepareStatement($sql); |
| 348 | $statement->execute(); |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * @inheritDoc |
| 353 | */ |
| 354 | public function dropIndex($tableName, $indexName) { |
| 355 | try { |
| 356 | $sql = "ALTER TABLE `".$tableName."` DROP INDEX `".$indexName."`"; |
| 357 | $statement = $this->dbObj->prepareStatement($sql); |
| 358 | $statement->execute(); |
| 359 | } |
| 360 | catch (DatabaseQueryExecutionException $e) { |
| 361 | if ($e->getCode() != '42000') { |
| 362 | throw $e; |
| 363 | } |
| 364 | if (in_array($indexName, $this->getIndices($tableName))) { |
| 365 | throw $e; |
| 366 | } |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * @inheritDoc |
| 372 | */ |
| 373 | public function dropPrimaryKey($tableName) { |
| 374 | try { |
| 375 | $sql = "ALTER TABLE ".$tableName." DROP PRIMARY KEY"; |
| 376 | $statement = $this->dbObj->prepareStatement($sql); |
| 377 | $statement->execute(); |
| 378 | } |
| 379 | catch (DatabaseQueryExecutionException $e) { |
| 380 | if ($e->getCode() != '42000') { |
| 381 | throw $e; |
| 382 | } |
| 383 | if (in_array("PRIMARY", $this->getIndices($tableName))) { |
| 384 | throw $e; |
| 385 | } |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * @inheritDoc |
| 391 | */ |
| 392 | public function dropForeignKey($tableName, $indexName) { |
| 393 | try { |
| 394 | $sql = "ALTER TABLE `".$tableName."` DROP FOREIGN KEY `".$indexName."`"; |
| 395 | $statement = $this->dbObj->prepareStatement($sql); |
| 396 | $statement->execute(); |
| 397 | } |
| 398 | catch (DatabaseQueryExecutionException $e) { |
| 399 | if ($e->getCode() != '42000') { |
| 400 | throw $e; |
| 401 | } |
| 402 | if (in_array($indexName, array_keys($this->getForeignKeys($tableName)))) { |
| 403 | throw $e; |
| 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * Builds a column definition for execution in a create table or alter table statement. |
| 410 | * |
| 411 | * @param string $columnName |
| 412 | * @param array $columnData |
| 413 | * @return string |
| 414 | */ |
| 415 | protected function buildColumnDefinition($columnName, $columnData) { |
| 416 | // column name |
| 417 | $definition = "`".$columnName."`"; |
| 418 | // column type |
| 419 | $definition .= " ".$columnData['type']; |
| 420 | |
| 421 | // column length and decimals |
| 422 | if (!empty($columnData['length'])) { |
| 423 | $definition .= "(".$columnData['length'].(!empty($columnData['decimals']) ? ",".$columnData['decimals'] : "").")"; |
| 424 | } |
| 425 | // enum / set |
| 426 | if ($columnData['type'] == 'enum' && !empty($columnData['values'])) { |
| 427 | $definition .= "(".$columnData['values'].")"; |
| 428 | } |
| 429 | // not null / null |
| 430 | if (!empty($columnData['notNull'])) $definition .= " NOT NULL"; |
| 431 | // default |
| 432 | if (isset($columnData['default']) && $columnData['default'] !== '') $definition .= " DEFAULT ".$columnData['default']; |
| 433 | // auto_increment |
| 434 | if (!empty($columnData['autoIncrement'])) $definition .= " AUTO_INCREMENT"; |
| 435 | // key |
| 436 | if (!empty($columnData['key'])) $definition .= " ".$columnData['key']." KEY"; |
| 437 | |
| 438 | return $definition; |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * Builds a index definition for execution in a create table or alter table statement. |
| 443 | * |
| 444 | * @param string $indexName |
| 445 | * @param array $indexData |
| 446 | * @return string |
| 447 | */ |
| 448 | protected function buildIndexDefinition($indexName, $indexData) { |
| 449 | // index type |
| 450 | if ($indexData['type'] == 'PRIMARY') $definition = "PRIMARY KEY"; |
| 451 | else if ($indexData['type'] == 'UNIQUE') $definition = "UNIQUE KEY"; |
| 452 | else if ($indexData['type'] == 'FULLTEXT') $definition = "FULLTEXT KEY"; |
| 453 | else $definition = "KEY"; |
| 454 | |
| 455 | // index name |
| 456 | if (!empty($indexName)) $definition .= " `".$indexName."`"; |
| 457 | // columns |
| 458 | $definition .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)"; |
| 459 | |
| 460 | return $definition; |
| 461 | } |
| 462 | } |