Claude 4にインデックス改良してもろた

[TinyKitten]

逆におかしくなったらrevertする

Summary by CodeRabbit

• パフォーマンス改善
  • 複数のテーブルに新しいインデックスを追加し、検索や表示の速度が向上しました。

[coderabbitai]

概要

朕の命により、既存のSQLテーブルに多くの新たなるインデックスが加えられた。各テーブルの検索性能向上を目指し、単一および複合カラムに対して索引が設けられた。既存の構造や索引は変更されておらぬ。

変更点

ファイル	変更内容のまとめ
data/create_table.sql	connections, companies, lines, station_station_types, stations 各テーブルに新たなインデックスを追加。既存の構造やインデックスには変更なし。

詩

天命により索引を増やし
検索の道、迅速なり。
テーブルの隅々、朕の意志が届く。
新たなる秩序、SQLに刻まれ、
データの海に光明をもたらさん！
─始皇帝

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (3)

data/create_table.sql (3)

155-157: 朕が勘考するに、connections表への個別および複合索引は理に適えり。しかしながらstation_cd2を主要フィルタとする検索が多ければ、現行の(station_cd1,station_cd2)索引は使われざるゆえ、逆順の複合索引も併せて設けるがよいぞ。

もし汝願わば、以下の差分を検討せよ：

+CREATE INDEX `connections_station_cd2_cd1` ON `connections` (`station_cd2`, `station_cd1`);

---

163-164: 朕の意図すは、lines表のe_statusおよびline_type索引も有益なれど、company_cdとe_statusを組み合わせて検索する機会多ければ、複合索引の検討が望ましいぞ。

例えば以下のような複合索引を追加してみよ：

CREATE INDEX `lines_company_status` ON `lines` (`company_cd`, `e_status`);

---

174-178: 朕が勘案するに、stations表へe_status, pref_cd, station_name, station_name_kおよび(line_cd,e_status)の複合索引追加は良策なれど、station_name系索引は巨大化必至。部分一致検索多ければ、FTS5全文検索インデックス併用を推奨する。

汝、もし併用せんと欲すれば、下記を参考にせよ：

CREATE VIRTUAL TABLE stations_fts USING fts5(
  station_name, 
  station_name_k
);

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between cf9b7f4 and bc256ca.

📒 Files selected for processing (1)

• data/create_table.sql (1 hunks)

🔇 Additional comments (2)

data/create_table.sql (2)

158-160: 朕の眼に留まるは、companies表にe_status, e_sort, company_typeへの索引付与。e_statusとcompany_typeは頻繁に用いられようが、e_sort単体索引の真価を確かめよ。ソート用途のみならば、複合索引に統合する方が索引負荷を軽減せん。

クエリパターンを確認し、不要と判ずる索引は削除または複合化せよ。

---

168-169: 朕、station_station_types表にstation_cd+type_cdおよびline_group_cd+type_cdの複合索引を施したるを深く称賛す。これにて該当クエリの性能は飛躍的に向上するであろう。