AlterQuery  t_sparse_mutations_3 (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration s (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 5)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType UInt64
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
 Identifier t_sparse_mutations_3
