SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function greater (children 1)
     ExpressionList (children 2)
      Function length (children 1)
       ExpressionList (children 1)
        Function currentUser (children 1)
         ExpressionList
      Literal UInt64_0