SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 5)
    Function plus (alias d) (children 1)
     ExpressionList (children 2)
      Identifier c
      Literal UInt64_1
    Function plus (alias b) (children 1)
     ExpressionList (children 2)
      Identifier a
      Literal UInt64_1
    Literal UInt64_1 (alias a)
    Function plus (alias c) (children 1)
     ExpressionList (children 2)
      Identifier b
      Literal UInt64_1
    Identifier d