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develop: fix paging sql with multiple columns for cluster index table #11341

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merged 3 commits into from
Jan 18, 2023
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develop: fix paging sql with multiple columns for cluster index table #11341

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fix(develop): fix paging sql with multiple columns for cluster index …
Mini256 Sep 19, 2022
dc11785
fix add note
Mini256 Oct 24, 2022
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Mini256 Oct 25, 2022
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13 changes: 11 additions & 2 deletions develop/dev-guide-paginate-results.md
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Original file line number Diff line number Diff line change
Expand Up @@ -306,6 +306,10 @@ GROUP BY page_num
ORDER BY page_num;
```

> **Note:**
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>
> 该 SQL 会以 `TableFullScan` 方式执行，当数据量较大时，查询速度会变慢，这里可以[使用 TiFlash](/tiflash/tiflash-overview.md#使用-tiflash)进行加速。
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查询结果如下：

```
Expand All @@ -331,7 +335,12 @@ ORDER BY page_num;
```sql
SELECT * FROM ratings
WHERE
(book_id, user_id) >= (268996, 92104804)
AND (book_id, user_id) <= (140982742, 374645100)
(book_id > 268996 AND book_id < 140982742)
OR (
book_id = 268996 AND user_id >= 92104804
)
OR (
book_id = 140982742 AND user_id <= 374645100
)
ORDER BY book_id, user_id;
```