presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/SemiTransactionalHiveMetastore.java/SemiTransactionalHiveMetastore/undoAlterTableOperations
class SemiTransactionalHiveMetastore:        private void undoAlterTableOperations()
        {
            for (AlterTableOperation alterTableOperation : alterTableOperations) {
                try {
                    alterTableOperation.undo(delegate);
                }
                catch (Throwable throwable) {
                    logCleanupFailure(throwable, "failed to rollback: %s", alterTableOperation.getDescription());
                }
            }
        }