SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier enum_test
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier timestamp
    OrderByElement (children 1)
     Identifier e
   Set
