disableMigrationWarning(); if ($this->uuidIndexExist()) { $this->removeUuidIndex(); } } public function down(Schema $schema): void { $this->throwIrreversibleMigrationException(); } private function uuidIndexExist(): bool { $query = <<connection ->executeQuery($query) ->fetchOne(); return (int) $result !== 0; } private function disableMigrationWarning(): void { $this->addSql('SELECT 1'); } private function removeUuidIndex() { $query = <<addSql($query); } }