doctrine / dbal

        $tableName = $diff->getName($this)->getQuotedName($this);

        $sql = [];

        if ($this->supportsForeignKeyConstraints()) {

            foreach ($diff->removedForeignKeys as $foreignKey) {

                $sql[] = $this->getDropForeignKeySQL($foreignKey, $tableName);

            }

            foreach ($diff->changedForeignKeys as $foreignKey) {

                $sql[] = $this->getDropForeignKeySQL($foreignKey, $tableName);

            }

        }

        foreach ($diff->removedIndexes as $index) {

            $sql[] = $this->getDropIndexSQL($index, $tableName);

        $sql = [];

        if ($this->supportsForeignKeyConstraints()) {

            foreach ($diff->addedForeignKeys as $foreignKey) {

                $sql[] = $this->getCreateForeignKeySQL($foreignKey, $tableName);

            }

            foreach ($diff->changedForeignKeys as $foreignKey) {

                $sql[] = $this->getCreateForeignKeySQL($foreignKey, $tableName);

            }

        }

        foreach ($diff->addedIndexes as $index) {

            $sql[] = $this->getCreateIndexSQL($index, $tableName);