evolution-cms /
evolution
Complex classes like SQLServerPlatform often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use SQLServerPlatform, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 66 | class SQLServerPlatform extends AbstractPlatform |
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| 67 | { |
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| 68 | /** |
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| 69 | * {@inheritdoc} |
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| 70 | */ |
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| 71 | public function getCurrentDateSQL() |
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| 75 | |||
| 76 | /** |
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| 77 | * {@inheritdoc} |
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| 78 | */ |
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| 79 | public function getCurrentTimeSQL() |
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| 83 | |||
| 84 | /** |
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| 85 | * Returns an expression that converts an expression of one data type to another. |
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| 86 | * |
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| 87 | * @param string $dataType The target native data type. Alias data types cannot be used. |
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| 88 | * @param string $expression The SQL expression to convert. |
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| 89 | * |
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| 90 | * @return string |
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| 91 | */ |
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| 92 | private function getConvertExpression($dataType, $expression) |
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| 96 | |||
| 97 | /** |
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| 98 | * {@inheritdoc} |
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| 99 | */ |
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| 100 | protected function getDateArithmeticIntervalExpression($date, $operator, $interval, $unit) |
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| 110 | |||
| 111 | /** |
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| 112 | * {@inheritDoc} |
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| 113 | */ |
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| 114 | public function getDateDiffExpression($date1, $date2) |
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| 118 | |||
| 119 | /** |
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| 120 | * {@inheritDoc} |
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| 121 | * |
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| 122 | * Microsoft SQL Server prefers "autoincrement" identity columns |
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| 123 | * since sequences can only be emulated with a table. |
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| 124 | */ |
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| 125 | public function prefersIdentityColumns() |
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| 129 | |||
| 130 | /** |
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| 131 | * {@inheritDoc} |
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| 132 | * |
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| 133 | * Microsoft SQL Server supports this through AUTO_INCREMENT columns. |
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| 134 | */ |
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| 135 | public function supportsIdentityColumns() |
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| 139 | |||
| 140 | /** |
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| 141 | * {@inheritDoc} |
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| 142 | */ |
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| 143 | public function supportsReleaseSavepoints() |
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| 147 | |||
| 148 | /** |
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| 149 | * {@inheritdoc} |
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| 150 | */ |
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| 151 | public function supportsSchemas() |
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| 155 | |||
| 156 | /** |
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| 157 | * {@inheritdoc} |
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| 158 | */ |
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| 159 | public function getDefaultSchemaName() |
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| 163 | |||
| 164 | /** |
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| 165 | * {@inheritDoc} |
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| 166 | */ |
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| 167 | public function supportsColumnCollation() |
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| 171 | |||
| 172 | /** |
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| 173 | * {@inheritDoc} |
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| 174 | */ |
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| 175 | public function hasNativeGuidType() |
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| 179 | |||
| 180 | /** |
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| 181 | * {@inheritDoc} |
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| 182 | */ |
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| 183 | public function getCreateDatabaseSQL($name) |
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| 187 | |||
| 188 | /** |
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| 189 | * {@inheritDoc} |
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| 190 | */ |
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| 191 | public function getDropDatabaseSQL($name) |
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| 195 | |||
| 196 | /** |
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| 197 | * {@inheritDoc} |
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| 198 | */ |
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| 199 | public function supportsCreateDropDatabase() |
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| 203 | |||
| 204 | /** |
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| 205 | * {@inheritDoc} |
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| 206 | */ |
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| 207 | public function getCreateSchemaSQL($schemaName) |
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| 211 | |||
| 212 | /** |
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| 213 | * {@inheritDoc} |
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| 214 | */ |
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| 215 | public function getDropForeignKeySQL($foreignKey, $table) |
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| 230 | |||
| 231 | /** |
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| 232 | * {@inheritDoc} |
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| 233 | */ |
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| 234 | public function getDropIndexSQL($index, $table = null) |
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| 255 | |||
| 256 | /** |
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| 257 | * {@inheritDoc} |
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| 258 | */ |
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| 259 | protected function _getCreateTableSQL($tableName, array $columns, array $options = []) |
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| 322 | |||
| 323 | /** |
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| 324 | * {@inheritDoc} |
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| 325 | */ |
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| 326 | public function getCreatePrimaryKeySQL(Index $index, $table) |
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| 335 | |||
| 336 | /** |
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| 337 | * Returns the SQL statement for creating a column comment. |
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| 338 | * |
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| 339 | * SQL Server does not support native column comments, |
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| 340 | * therefore the extended properties functionality is used |
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| 341 | * as a workaround to store them. |
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| 342 | * The property name used to store column comments is "MS_Description" |
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| 343 | * which provides compatibility with SQL Server Management Studio, |
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| 344 | * as column comments are stored in the same property there when |
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| 345 | * specifying a column's "Description" attribute. |
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| 346 | * |
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| 347 | * @param string $tableName The quoted table name to which the column belongs. |
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| 348 | * @param string $columnName The quoted column name to create the comment for. |
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| 349 | * @param string $comment The column's comment. |
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| 350 | * |
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| 351 | * @return string |
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| 352 | */ |
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| 353 | protected function getCreateColumnCommentSQL($tableName, $columnName, $comment) |
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| 375 | |||
| 376 | /** |
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| 377 | * Returns the SQL snippet for declaring a default constraint. |
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| 378 | * |
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| 379 | * @param string $table Name of the table to return the default constraint declaration for. |
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| 380 | * @param array $column Column definition. |
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| 381 | * |
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| 382 | * @return string |
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| 383 | * |
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| 384 | * @throws \InvalidArgumentException |
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| 385 | */ |
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| 386 | public function getDefaultConstraintDeclarationSQL($table, array $column) |
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| 400 | |||
| 401 | /** |
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| 402 | * {@inheritDoc} |
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| 403 | */ |
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| 404 | public function getUniqueConstraintDeclarationSQL($name, Index $index) |
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| 412 | |||
| 413 | /** |
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| 414 | * {@inheritDoc} |
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| 415 | */ |
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| 416 | public function getCreateIndexSQL(Index $index, $table) |
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| 426 | |||
| 427 | /** |
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| 428 | * {@inheritDoc} |
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| 429 | */ |
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| 430 | protected function getCreateIndexSQLFlags(Index $index) |
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| 445 | |||
| 446 | /** |
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| 447 | * Extend unique key constraint with required filters |
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| 448 | * |
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| 449 | * @param string $sql |
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| 450 | * @param \Doctrine\DBAL\Schema\Index $index |
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| 451 | * |
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| 452 | * @return string |
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| 453 | */ |
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| 454 | private function _appendUniqueConstraintDefinition($sql, Index $index) |
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| 464 | |||
| 465 | /** |
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| 466 | * {@inheritDoc} |
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| 467 | */ |
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| 468 | public function getAlterTableSQL(TableDiff $diff) |
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| 626 | |||
| 627 | /** |
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| 628 | * Returns the SQL clause for adding a default constraint in an ALTER TABLE statement. |
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| 629 | * |
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| 630 | * @param string $tableName The name of the table to generate the clause for. |
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| 631 | * @param Column $column The column to generate the clause for. |
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| 632 | * |
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| 633 | * @return string |
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| 634 | */ |
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| 635 | private function getAlterTableAddDefaultConstraintClause($tableName, Column $column) |
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| 642 | |||
| 643 | /** |
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| 644 | * Returns the SQL clause for dropping an existing default constraint in an ALTER TABLE statement. |
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| 645 | * |
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| 646 | * @param string $tableName The name of the table to generate the clause for. |
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| 647 | * @param string $columnName The name of the column to generate the clause for. |
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| 648 | * |
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| 649 | * @return string |
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| 650 | */ |
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| 651 | private function getAlterTableDropDefaultConstraintClause($tableName, $columnName) |
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| 655 | |||
| 656 | /** |
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| 657 | * Checks whether a column alteration requires dropping its default constraint first. |
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| 658 | * |
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| 659 | * Different to other database vendors SQL Server implements column default values |
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| 660 | * as constraints and therefore changes in a column's default value as well as changes |
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| 661 | * in a column's type require dropping the default constraint first before being to |
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| 662 | * alter the particular column to the new definition. |
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| 663 | * |
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| 664 | * @param ColumnDiff $columnDiff The column diff to evaluate. |
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| 665 | * |
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| 666 | * @return bool True if the column alteration requires dropping its default constraint first, false otherwise. |
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| 667 | */ |
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| 668 | private function alterColumnRequiresDropDefaultConstraint(ColumnDiff $columnDiff) |
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| 692 | |||
| 693 | /** |
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| 694 | * Returns the SQL statement for altering a column comment. |
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| 695 | * |
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| 696 | * SQL Server does not support native column comments, |
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| 697 | * therefore the extended properties functionality is used |
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| 698 | * as a workaround to store them. |
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| 699 | * The property name used to store column comments is "MS_Description" |
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| 700 | * which provides compatibility with SQL Server Management Studio, |
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| 701 | * as column comments are stored in the same property there when |
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| 702 | * specifying a column's "Description" attribute. |
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| 703 | * |
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| 704 | * @param string $tableName The quoted table name to which the column belongs. |
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| 705 | * @param string $columnName The quoted column name to alter the comment for. |
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| 706 | * @param string $comment The column's comment. |
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| 707 | * |
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| 708 | * @return string |
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| 709 | */ |
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| 710 | protected function getAlterColumnCommentSQL($tableName, $columnName, $comment) |
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| 732 | |||
| 733 | /** |
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| 734 | * Returns the SQL statement for dropping a column comment. |
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| 735 | * |
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| 736 | * SQL Server does not support native column comments, |
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| 737 | * therefore the extended properties functionality is used |
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| 738 | * as a workaround to store them. |
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| 739 | * The property name used to store column comments is "MS_Description" |
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| 740 | * which provides compatibility with SQL Server Management Studio, |
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| 741 | * as column comments are stored in the same property there when |
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| 742 | * specifying a column's "Description" attribute. |
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| 743 | * |
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| 744 | * @param string $tableName The quoted table name to which the column belongs. |
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| 745 | * @param string $columnName The quoted column name to drop the comment for. |
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| 746 | * |
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| 747 | * @return string |
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| 748 | */ |
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| 749 | protected function getDropColumnCommentSQL($tableName, $columnName) |
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| 770 | |||
| 771 | /** |
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| 772 | * {@inheritdoc} |
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| 773 | */ |
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| 774 | protected function getRenameIndexSQL($oldIndexName, Index $index, $tableName) |
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| 785 | |||
| 786 | /** |
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| 787 | * Returns the SQL statement for adding an extended property to a database object. |
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| 788 | * |
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| 789 | * @param string $name The name of the property to add. |
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| 790 | * @param string|null $value The value of the property to add. |
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| 791 | * @param string|null $level0Type The type of the object at level 0 the property belongs to. |
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| 792 | * @param string|null $level0Name The name of the object at level 0 the property belongs to. |
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| 793 | * @param string|null $level1Type The type of the object at level 1 the property belongs to. |
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| 794 | * @param string|null $level1Name The name of the object at level 1 the property belongs to. |
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| 795 | * @param string|null $level2Type The type of the object at level 2 the property belongs to. |
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| 796 | * @param string|null $level2Name The name of the object at level 2 the property belongs to. |
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| 797 | * |
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| 798 | * @return string |
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| 799 | * |
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| 800 | * @link http://msdn.microsoft.com/en-us/library/ms180047%28v=sql.90%29.aspx |
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| 801 | */ |
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| 802 | public function getAddExtendedPropertySQL( |
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| 818 | |||
| 819 | /** |
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| 820 | * Returns the SQL statement for dropping an extended property from a database object. |
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| 821 | * |
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| 822 | * @param string $name The name of the property to drop. |
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| 823 | * @param string|null $level0Type The type of the object at level 0 the property belongs to. |
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| 824 | * @param string|null $level0Name The name of the object at level 0 the property belongs to. |
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| 825 | * @param string|null $level1Type The type of the object at level 1 the property belongs to. |
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| 826 | * @param string|null $level1Name The name of the object at level 1 the property belongs to. |
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| 827 | * @param string|null $level2Type The type of the object at level 2 the property belongs to. |
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| 828 | * @param string|null $level2Name The name of the object at level 2 the property belongs to. |
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| 829 | * |
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| 830 | * @return string |
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| 831 | * |
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| 832 | * @link http://technet.microsoft.com/en-gb/library/ms178595%28v=sql.90%29.aspx |
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| 833 | */ |
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| 834 | public function getDropExtendedPropertySQL( |
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| 849 | |||
| 850 | /** |
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| 851 | * Returns the SQL statement for updating an extended property of a database object. |
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| 852 | * |
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| 853 | * @param string $name The name of the property to update. |
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| 854 | * @param string|null $value The value of the property to update. |
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| 855 | * @param string|null $level0Type The type of the object at level 0 the property belongs to. |
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| 856 | * @param string|null $level0Name The name of the object at level 0 the property belongs to. |
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| 857 | * @param string|null $level1Type The type of the object at level 1 the property belongs to. |
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| 858 | * @param string|null $level1Name The name of the object at level 1 the property belongs to. |
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| 859 | * @param string|null $level2Type The type of the object at level 2 the property belongs to. |
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| 860 | * @param string|null $level2Name The name of the object at level 2 the property belongs to. |
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| 861 | * |
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| 862 | * @return string |
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| 863 | * |
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| 864 | * @link http://msdn.microsoft.com/en-us/library/ms186885%28v=sql.90%29.aspx |
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| 865 | */ |
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| 866 | public function getUpdateExtendedPropertySQL( |
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| 882 | |||
| 883 | /** |
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| 884 | * {@inheritDoc} |
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| 885 | */ |
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| 886 | public function getEmptyIdentityInsertSQL($quotedTableName, $quotedIdentifierColumnName) |
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| 890 | |||
| 891 | /** |
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| 892 | * {@inheritDoc} |
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| 893 | */ |
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| 894 | public function getListTablesSQL() |
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| 900 | |||
| 901 | /** |
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| 902 | * {@inheritDoc} |
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| 903 | */ |
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| 904 | public function getListTableColumnsSQL($table, $database = null) |
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| 933 | |||
| 934 | /** |
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| 935 | * {@inheritDoc} |
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| 936 | */ |
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| 937 | public function getListTableForeignKeysSQL($table, $database = null) |
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| 955 | |||
| 956 | /** |
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| 957 | * {@inheritDoc} |
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| 958 | */ |
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| 959 | public function getListTableIndexesSQL($table, $currentDatabase = null) |
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| 978 | |||
| 979 | /** |
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| 980 | * {@inheritDoc} |
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| 981 | */ |
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| 982 | public function getCreateViewSQL($name, $sql) |
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| 986 | |||
| 987 | /** |
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| 988 | * {@inheritDoc} |
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| 989 | */ |
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| 990 | public function getListViewsSQL($database) |
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| 994 | |||
| 995 | /** |
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| 996 | * Returns the where clause to filter schema and table name in a query. |
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| 997 | * |
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| 998 | * @param string $table The full qualified name of the table. |
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| 999 | * @param string $schemaColumn The name of the column to compare the schema to in the where clause. |
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| 1000 | * @param string $tableColumn The name of the column to compare the table to in the where clause. |
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| 1001 | * |
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| 1002 | * @return string |
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| 1003 | */ |
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| 1004 | private function getTableWhereClause($table, $schemaColumn, $tableColumn) |
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| 1017 | |||
| 1018 | /** |
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| 1019 | * {@inheritDoc} |
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| 1020 | */ |
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| 1021 | public function getDropViewSQL($name) |
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| 1025 | |||
| 1026 | /** |
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| 1027 | * {@inheritDoc} |
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| 1028 | * |
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| 1029 | * @deprecated Use application-generated UUIDs instead |
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| 1030 | */ |
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| 1031 | public function getGuidExpression() |
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| 1035 | |||
| 1036 | /** |
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| 1037 | * {@inheritDoc} |
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| 1038 | */ |
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| 1039 | public function getLocateExpression($str, $substr, $startPos = false) |
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| 1047 | |||
| 1048 | /** |
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| 1049 | * {@inheritDoc} |
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| 1050 | */ |
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| 1051 | public function getModExpression($expression1, $expression2) |
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| 1055 | |||
| 1056 | /** |
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| 1057 | * {@inheritDoc} |
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| 1058 | */ |
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| 1059 | public function getTrimExpression($str, $pos = TrimMode::UNSPECIFIED, $char = false) |
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| 1099 | |||
| 1100 | /** |
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| 1101 | * {@inheritDoc} |
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| 1102 | */ |
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| 1103 | public function getConcatExpression() |
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| 1109 | |||
| 1110 | /** |
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| 1111 | * {@inheritDoc} |
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| 1112 | */ |
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| 1113 | public function getListDatabasesSQL() |
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| 1117 | |||
| 1118 | /** |
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| 1119 | * {@inheritDoc} |
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| 1120 | */ |
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| 1121 | public function getListNamespacesSQL() |
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| 1125 | |||
| 1126 | /** |
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| 1127 | * {@inheritDoc} |
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| 1128 | */ |
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| 1129 | public function getSubstringExpression($value, $from, $length = null) |
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| 1137 | |||
| 1138 | /** |
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| 1139 | * {@inheritDoc} |
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| 1140 | */ |
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| 1141 | public function getLengthExpression($column) |
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| 1145 | |||
| 1146 | /** |
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| 1147 | * {@inheritDoc} |
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| 1148 | */ |
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| 1149 | public function getSetTransactionIsolationSQL($level) |
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| 1153 | |||
| 1154 | /** |
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| 1155 | * {@inheritDoc} |
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| 1156 | */ |
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| 1157 | public function getIntegerTypeDeclarationSQL(array $field) |
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| 1161 | |||
| 1162 | /** |
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| 1163 | * {@inheritDoc} |
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| 1164 | */ |
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| 1165 | public function getBigIntTypeDeclarationSQL(array $field) |
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| 1169 | |||
| 1170 | /** |
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| 1171 | * {@inheritDoc} |
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| 1172 | */ |
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| 1173 | public function getSmallIntTypeDeclarationSQL(array $field) |
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| 1177 | |||
| 1178 | /** |
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| 1179 | * {@inheritDoc} |
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| 1180 | */ |
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| 1181 | public function getGuidTypeDeclarationSQL(array $field) |
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| 1185 | |||
| 1186 | /** |
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| 1187 | * {@inheritDoc} |
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| 1188 | */ |
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| 1189 | protected function getVarcharTypeDeclarationSQLSnippet($length, $fixed) |
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| 1193 | |||
| 1194 | /** |
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| 1195 | * {@inheritdoc} |
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| 1196 | */ |
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| 1197 | protected function getBinaryTypeDeclarationSQLSnippet($length, $fixed) |
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| 1201 | |||
| 1202 | /** |
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| 1203 | * {@inheritdoc} |
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| 1204 | */ |
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| 1205 | public function getBinaryMaxLength() |
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| 1209 | |||
| 1210 | /** |
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| 1211 | * {@inheritDoc} |
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| 1212 | */ |
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| 1213 | public function getClobTypeDeclarationSQL(array $field) |
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| 1217 | |||
| 1218 | /** |
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| 1219 | * {@inheritDoc} |
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| 1220 | */ |
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| 1221 | protected function _getCommonIntegerTypeDeclarationSQL(array $columnDef) |
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| 1225 | |||
| 1226 | /** |
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| 1227 | * {@inheritDoc} |
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| 1228 | */ |
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| 1229 | public function getDateTimeTypeDeclarationSQL(array $fieldDeclaration) |
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| 1233 | |||
| 1234 | /** |
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| 1235 | * {@inheritDoc} |
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| 1236 | */ |
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| 1237 | public function getDateTypeDeclarationSQL(array $fieldDeclaration) |
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| 1241 | |||
| 1242 | /** |
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| 1243 | * {@inheritDoc} |
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| 1244 | */ |
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| 1245 | public function getTimeTypeDeclarationSQL(array $fieldDeclaration) |
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| 1249 | |||
| 1250 | /** |
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| 1251 | * {@inheritDoc} |
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| 1252 | */ |
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| 1253 | public function getBooleanTypeDeclarationSQL(array $field) |
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| 1257 | |||
| 1258 | /** |
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| 1259 | * {@inheritDoc} |
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| 1260 | */ |
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| 1261 | protected function doModifyLimitQuery($query, $limit, $offset = null) |
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| 1305 | |||
| 1306 | /** |
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| 1307 | * Remove ORDER BY clauses in subqueries - they're not supported by SQL Server. |
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| 1308 | * Caveat: will leave ORDER BY in TOP N subqueries. |
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| 1309 | * |
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| 1310 | * @param string $query |
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| 1311 | * @return string |
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| 1312 | */ |
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| 1313 | private function scrubInnerOrderBy($query) |
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| 1352 | |||
| 1353 | /** |
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| 1354 | * Check an ORDER BY clause to see if it is in a TOP N query or subquery. |
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| 1355 | * |
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| 1356 | * @param string $query The query |
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| 1357 | * @param int $currentPosition Start position of ORDER BY clause |
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| 1358 | * @return bool true if ORDER BY is in a TOP N query, false otherwise |
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| 1359 | */ |
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| 1360 | private function isOrderByInTopNSubquery($query, $currentPosition) |
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| 1383 | |||
| 1384 | /** |
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| 1385 | * {@inheritDoc} |
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| 1386 | */ |
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| 1387 | public function supportsLimitOffset() |
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| 1391 | |||
| 1392 | /** |
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| 1393 | * {@inheritDoc} |
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| 1394 | */ |
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| 1395 | public function convertBooleans($item) |
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| 1409 | |||
| 1410 | /** |
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| 1411 | * {@inheritDoc} |
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| 1412 | */ |
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| 1413 | public function getCreateTemporaryTableSnippetSQL() |
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| 1417 | |||
| 1418 | /** |
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| 1419 | * {@inheritDoc} |
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| 1420 | */ |
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| 1421 | public function getTemporaryTableName($tableName) |
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| 1425 | |||
| 1426 | /** |
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| 1427 | * {@inheritDoc} |
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| 1428 | */ |
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| 1429 | public function getDateTimeFormatString() |
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| 1433 | |||
| 1434 | /** |
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| 1435 | * {@inheritDoc} |
||
| 1436 | */ |
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| 1437 | public function getDateFormatString() |
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| 1441 | |||
| 1442 | /** |
||
| 1443 | * {@inheritDoc} |
||
| 1444 | */ |
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| 1445 | public function getTimeFormatString() |
||
| 1449 | |||
| 1450 | /** |
||
| 1451 | * {@inheritDoc} |
||
| 1452 | */ |
||
| 1453 | public function getDateTimeTzFormatString() |
||
| 1457 | |||
| 1458 | /** |
||
| 1459 | * {@inheritDoc} |
||
| 1460 | */ |
||
| 1461 | public function getName() |
||
| 1465 | |||
| 1466 | /** |
||
| 1467 | * {@inheritDoc} |
||
| 1468 | */ |
||
| 1469 | protected function initializeDoctrineTypeMappings() |
||
| 1499 | |||
| 1500 | /** |
||
| 1501 | * {@inheritDoc} |
||
| 1502 | */ |
||
| 1503 | public function createSavePoint($savepoint) |
||
| 1507 | |||
| 1508 | /** |
||
| 1509 | * {@inheritDoc} |
||
| 1510 | */ |
||
| 1511 | public function releaseSavePoint($savepoint) |
||
| 1515 | |||
| 1516 | /** |
||
| 1517 | * {@inheritDoc} |
||
| 1518 | */ |
||
| 1519 | public function rollbackSavePoint($savepoint) |
||
| 1523 | |||
| 1524 | /** |
||
| 1525 | * {@inheritdoc} |
||
| 1526 | */ |
||
| 1527 | public function getForeignKeyReferentialActionSQL($action) |
||
| 1536 | |||
| 1537 | /** |
||
| 1538 | * {@inheritDoc} |
||
| 1539 | */ |
||
| 1540 | public function appendLockHint($fromClause, $lockMode) |
||
| 1556 | |||
| 1557 | /** |
||
| 1558 | * {@inheritDoc} |
||
| 1559 | */ |
||
| 1560 | public function getForUpdateSQL() |
||
| 1564 | |||
| 1565 | /** |
||
| 1566 | * {@inheritDoc} |
||
| 1567 | */ |
||
| 1568 | protected function getReservedKeywordsClass() |
||
| 1572 | |||
| 1573 | /** |
||
| 1574 | * {@inheritDoc} |
||
| 1575 | */ |
||
| 1576 | public function quoteSingleIdentifier($str) |
||
| 1580 | |||
| 1581 | /** |
||
| 1582 | * {@inheritDoc} |
||
| 1583 | */ |
||
| 1584 | public function getTruncateTableSQL($tableName, $cascade = false) |
||
| 1590 | |||
| 1591 | /** |
||
| 1592 | * {@inheritDoc} |
||
| 1593 | */ |
||
| 1594 | public function getBlobTypeDeclarationSQL(array $field) |
||
| 1598 | |||
| 1599 | /** |
||
| 1600 | * {@inheritDoc} |
||
| 1601 | */ |
||
| 1602 | public function getDefaultValueDeclarationSQL($field) |
||
| 1628 | |||
| 1629 | /** |
||
| 1630 | * {@inheritdoc} |
||
| 1631 | * |
||
| 1632 | * Modifies column declaration order as it differs in Microsoft SQL Server. |
||
| 1633 | */ |
||
| 1634 | public function getColumnDeclarationSQL($name, array $field) |
||
| 1656 | |||
| 1657 | /** |
||
| 1658 | * Returns a unique default constraint name for a table and column. |
||
| 1659 | * |
||
| 1660 | * @param string $table Name of the table to generate the unique default constraint name for. |
||
| 1661 | * @param string $column Name of the column in the table to generate the unique default constraint name for. |
||
| 1662 | * |
||
| 1663 | * @return string |
||
| 1664 | */ |
||
| 1665 | private function generateDefaultConstraintName($table, $column) |
||
| 1669 | |||
| 1670 | /** |
||
| 1671 | * Returns a hash value for a given identifier. |
||
| 1672 | * |
||
| 1673 | * @param string $identifier Identifier to generate a hash value for. |
||
| 1674 | * |
||
| 1675 | * @return string |
||
| 1676 | */ |
||
| 1677 | private function generateIdentifierName($identifier) |
||
| 1684 | } |
||
| 1685 |
Loading history...
This error can happen if you refactor code and forget to move the variable initialization.
Let’s take a look at a simple example:
The above code is perfectly fine. Now imagine that we re-order the statements:
In that case,
$xwould be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.