AlterQuery  t_mutation_rows_counter (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier x
     Literal UInt64_150
   ExpressionList (children 1)
    Assignment x (children 1)
     Function plus (children 1)
      ExpressionList (children 2)
       Identifier x
       Literal UInt64_1
 Identifier t_mutation_rows_counter
