SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier c1
    Identifier c2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 03164_multi_key
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier c1
    OrderByElement (children 1)
     Identifier c2
   Set
