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<?php namespace Doctrine\DBAL\Platforms\MySQL; use Doctrine\DBAL\Platforms\AbstractMySQLPlatform; use Doctrine\DBAL\Schema\Comparator as BaseComparator; use Doctrine\DBAL\Schema\Table; use Doctrine\DBAL\Schema\TableDiff; use function array_diff_assoc; use function array_intersect_key; /** * Compares schemas in the context of MySQL platform. * * In MySQL, unless specified explicitly, the column's character set and collation are inherited from its containing * table. So during comparison, an omitted value and the value that matches the default value of table in the * desired schema must be considered equal. */ class Comparator extends BaseComparator { /** @var CollationMetadataProvider */ private $collationMetadataProvider; /** @internal The comparator can be only instantiated by a schema manager. */ public function __construct(AbstractMySQLPlatform $platform, CollationMetadataProvider $collationMetadataProvider) { parent::__construct($platform); $this->collationMetadataProvider = $collationMetadataProvider; } public function compareTables(Table $fromTable, Table $toTable): TableDiff { return parent::compareTables( $this->normalizeColumns($fromTable), $this->normalizeColumns($toTable), ); } /** * {@inheritDoc} */ public function diffTable(Table $fromTable, Table $toTable) { return parent::diffTable( $this->normalizeColumns($fromTable), $this->normalizeColumns($toTable), ); } private function normalizeColumns(Table $table): Table { $tableOptions = array_intersect_key($table->getOptions(), [ 'charset' => null, 'collation' => null, ]); $table = clone $table; foreach ($table->getColumns() as $column) { $originalOptions = $column->getPlatformOptions(); $normalizedOptions = $this->normalizeOptions($originalOptions); $overrideOptions = array_diff_assoc($normalizedOptions, $tableOptions); if ($overrideOptions === $originalOptions) { continue; } $column->setPlatformOptions($overrideOptions); } return $table; } /** * @param array<string,string> $options * * @return array<string,string> */ private function normalizeOptions(array $options): array { if (isset($options['collation']) && ! isset($options['charset'])) { $charset = $this->collationMetadataProvider->getCollationCharset($options['collation']); if ($charset !== null) { $options['charset'] = $charset; } } return $options; } }
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