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i18n(ja): fix broken multiplication-sign spacing in cost-model.md #23605

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Merged
qiancai merged 1 commit into from
Aug 26, 2026
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i18n(ja): fix broken multiplication-sign spacing in cost-model.md #23605

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4 changes: 2 additions & 2 deletions cost-model.md
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Expand Up @@ -31,8 +31,8 @@ mysql> SHOW CREATE TABLE t;

`SELECT * FROM t WHERE b < 100 and c < 100`文を実行するときに、TiDB が`b < 100`条件を満たす行が 20 行、 `c < 100`行が 500 行で、 `INT`種類のインデックスの長さが 8 であると見積もったとします。この場合、TiDB は 2 つのインデックスのコストを計算します。

- インデックス`b`のコスト = 行数`b < 100` *インデックス`b`の長さ = 20* 8 = 160
- インデックス`c`のコスト = 行数`c < 100` *インデックス`c`の長さ = 500* 8 = 4000
- インデックス`b`のコスト = 行数`b < 100` \* インデックス`b`の長さ = 20 * 8 = 160
- インデックス`c`のコスト = 行数`c < 100` \* インデックス`c`の長さ = 500 * 8 = 4000

インデックス`b`のコストが低いため、TiDB はインデックスとして`b`選択します。

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