SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function if (children 1)
     ExpressionList (children 3)
      Function in (children 1)
       ExpressionList (children 2)
        Identifier dummy
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal UInt64_0
          Literal UInt64_1
      Literal \'ok\'
      Literal \'ok\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function remote (children 1)
       ExpressionList (children 2)
        Literal \'localhost\'
        Identifier system.one
