SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal \'ghj\'
          Function tuple (children 1)
           ExpressionList (children 2)
            Literal \'klm\'
            Literal Array_[UInt64_16, UInt64_17]
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal \'nop\'
          Function tuple (children 1)
           ExpressionList (children 2)
            Literal \'rst\'
            Literal Array_[UInt64_18]
      Literal \'Map(String, Map(String, Array(UInt8)))\'
