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sysvar: add 12 sysvars to docs-cn (#11495) #11604

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Oct 13, 2022
Merged

sysvar: add 12 sysvars to docs-cn (#11495) #11604

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7b4df67
This is an automated cherry-pick of #11495
TomShawn Oct 13, 2022
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Update aggregate-group-by-functions.md
TomShawn Oct 13, 2022
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Apply suggestions from code review
TomShawn Oct 13, 2022
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Update aggregate-group-by-functions.md
TomShawn Oct 13, 2022
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Update aggregate-group-by-functions.md
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@TomShawn
TomShawn authored Oct 13, 2022
commit 9edf15dd9fca17090e8ef1ac626dd192ff3f26f4
8 changes: 4 additions & 4 deletions functions-and-operators/aggregate-group-by-functions.md
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Expand Up @@ -182,12 +182,12 @@ from tbl_name
group by id, val;
```

## 相关系统变量

`group_concat_max_len` 变量设置 `GROUP_CONCAT()` 函数中的最大项目数。

## TiDB 不支持的聚合函数

TiDB 目前不支持的聚合函数如下所示，相关进展参阅 [TiDB #7623](https://github.com/pingcap/tidb/issues/7623)。

- `JSON_ARRAYAGG`

## 相关系统变量

`group_concat_max_len` 变量设置 `GROUP_CONCAT()` 函数中的最大项目数。