sql - Self Join により、Oracle 11g でタスクの実行が遅くなる

Question

event_extra次の自己結合クエリを作成したいくつかの条件に基づいて重複を見つけるために、as and on という名前のテーブルがありますが、レコードがそれ以上 (100 万) になると、多くの時間がかかります。

テーブルフィールドは次のとおりです

evt_id
extra1
extra2
extra3
extra4
extra5
extra6
extra7
extra8
extra9

このテーブルにはUnique indexがありevt_idます。

自己結合クエリ

select cde1.evt_id,
       cde1.extra1,
       cde1.extra2,
       cde1.extra3,
       cde1.extra4,
       cde1.extra5,
       cde1.extra6,
       cde2.evt_id as evt_id2,
       cde1.extra7,
       cde1.extra8,
       cde1.extra9,
  from event_extra cde2
  join event_extra cde1
    on (( cde1.extra4 = cde2.extra4 and cde1.extra7 = cde2.extra7) or
       (cde1.extra4 = cde2.extra5 and cde1.extra7 = cde2.extra8) or
       (cde1.extra4 = cde2.extra6 and cde1.extra7 = cde2.extra9) or
       (cde1.extra5 = cde2.extra4 and cde1.extra8 = cde2.extra7) or
       (cde1.extra5 = cde2.extra5 and cde1.extra8 = cde2.extra8) or
       (cde1.extra5 = cde2.extra6 and cde1.extra8 = cde2.extra9) or
       (cde1.extra6 = cde2.extra4 and cde1.extra9 = cde2.extra7) or
       (cde1.extra6 = cde2.extra5 and cde1.extra9 = cde2.extra8) or
       (cde1.extra6 = cde2.extra6 and cde1.extra9 = cde2.extra9))
   and ((to_number(cde1.extra3) >= to_number(cde2.extra1) and
       (to_number(cde1.extra3) <= to_number(cde2.extra2))) or
       ((to_number(cde1.extra1) >= to_number(cde2.extra2)) and
       (to_number(cde1.extra1) <= to_number(cde2.extra3))) or
       ((to_number(cde1.extra2) >= to_number(cde2.extra1)) and
       (to_number(cde1.extra2) <= to_number(cde2.extra3))))
   and cde1.evt_id > cde2.evt_id
 order by cde1.evt_id;

上記のクエリのパフォーマンスを向上させるために利用できる他のアプローチはありますか?

Database Version: Oracle11g