AlterQuery  t_mutations_nondeterministic (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Literal UInt64_1
   ExpressionList (children 1)
    Assignment v (children 1)
     Function filesystemCapacity (children 1)
      ExpressionList (children 1)
       Function materialize (children 1)
        ExpressionList (children 1)
         Literal \'default\'
 Identifier t_mutations_nondeterministic
