SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function arrayJoin (children 1)
         ExpressionList (children 1)
          Function array (children 1)
           ExpressionList (children 2)
            Identifier x
            Literal UInt64_1
      Literal Array_[UInt64_1, UInt64_2]
