SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function topK (children 1)
       ExpressionList (children 1)
        Identifier A
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function remote (children 1)
       ExpressionList (children 3)
        Literal \'localhost,127.0.0.1\'
        Function currentDatabase (children 1)
         ExpressionList
        Identifier topXtest