AlterQuery  mutate_and_zero_copy_replication1 (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Literal UInt64_1
   ExpressionList (children 1)
    Assignment a (children 1)
     Literal UInt64_2
 Identifier mutate_and_zero_copy_replication1
