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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Db\Oracle; |
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use Yiisoft\Db\Exception\Exception; |
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use Yiisoft\Db\Exception\NotSupportedException; |
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use Yiisoft\Db\Query\DDLQueryBuilder as AbstractDDLQueryBuilder; |
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use Yiisoft\Db\Query\QueryBuilderInterface; |
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use Yiisoft\Db\Schema\ColumnSchemaBuilder; |
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final class DDLQueryBuilder extends AbstractDDLQueryBuilder |
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{ |
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public function __construct(private QueryBuilderInterface $queryBuilder) |
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{ |
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parent::__construct($queryBuilder); |
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} |
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public function addForeignKey(string $name, string $table, array|string $columns, string $refTable, array|string $refColumns, ?string $delete = null, ?string $update = null): string |
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{ |
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$sql = 'ALTER TABLE ' . $this->quoter->quoteTableName($table) |
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. ' ADD CONSTRAINT ' . $this->quoter->quoteColumnName($name) |
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. ' FOREIGN KEY (' . $this->queryBuilder->buildColumns($columns) . ')' |
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. ' REFERENCES ' . $this->quoter->quoteTableName($refTable) |
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. ' (' . $this->queryBuilder->buildColumns($refColumns) . ')'; |
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if ($delete !== null) { |
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$sql .= ' ON DELETE ' . $delete; |
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} |
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if ($update !== null) { |
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throw new Exception('Oracle does not support ON UPDATE clause.'); |
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} |
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return $sql; |
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} |
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public function alterColumn(string $table, string $column, ColumnSchemaBuilder|string $type): string |
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{ |
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return 'ALTER TABLE ' |
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. $this->quoter->quoteTableName($table) |
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. ' MODIFY ' |
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. $this->quoter->quoteColumnName($column) |
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. ' ' . $this->queryBuilder->getColumnType($type); |
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} |
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public function checkIntegrity(string $schema = '', string $table = '', bool $check = true): string |
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{ |
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throw new NotSupportedException('Oracle does not support enabling/disabling integrity check.'); |
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} |
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public function dropCommentFromColumn(string $table, string $column): string |
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{ |
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return 'COMMENT ON COLUMN ' |
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. $this->quoter->quoteTableName($table) |
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. '.' |
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. $this->quoter->quoteColumnName($column) |
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. " IS ''"; |
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} |
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public function dropCommentFromTable(string $table): string |
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{ |
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return 'COMMENT ON TABLE ' . $this->quoter->quoteTableName($table) . " IS ''"; |
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} |
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public function dropIndex(string $name, string $table): string |
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{ |
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return 'DROP INDEX ' . $this->quoter->quoteTableName($name); |
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} |
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public function renameTable(string $oldName, string $newName): string |
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{ |
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return 'ALTER TABLE ' . $this->quoter->quoteTableName($oldName) . ' RENAME TO ' . |
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$this->quoter->quoteTableName($newName); |
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} |
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} |
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Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: