SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function map (alias m) (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
    Function mapKeys (children 1)
     ExpressionList (children 1)
      Identifier m
    Function mapValues (children 1)
     ExpressionList (children 1)
      Identifier m