SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier name
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.server_settings
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier is_obsolete
     Literal UInt64_1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier name
