SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function mapAll (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier k
          Identifier v
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Function array (children 1)
           ExpressionList (children 2)
            Literal UInt64_1
            Literal UInt64_2
      Function map (children 1)
       ExpressionList (children 4)
        Function array (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Literal UInt64_2
        Literal UInt64_4
        Function array (children 1)
         ExpressionList (children 2)
          Literal UInt64_3
          Literal UInt64_4
        Literal UInt64_5