> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# describe_include_* 会话设置

> describe_include_* 自动生成分组中的 ClickHouse 会话设置。

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>类型</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>默认值</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          无需重启即可更改
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

这些设置可在 [system.settings](/docs/zh/reference/system-tables/settings) 中查看，并由 [源代码](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp) 自动生成。

<div id="describe_include_subcolumns">
  ## describe\_include\_subcolumns
</div>

<SettingsInfoBlock type="Bool" default_value="0" />

启用在 [DESCRIBE](/docs/zh/reference/statements/describe-table) 查询中显示子列。例如，[Tuple](/docs/zh/reference/data-types/tuple) 的成员，或 [Map](/docs/zh/reference/data-types/map#reading-subcolumns-of-map)、[Nullable](/docs/zh/reference/data-types/nullable#finding-null) 或 [Array](/docs/zh/reference/data-types/array#array-size) 数据类型的子列。

可能的值：

* 0 — `DESCRIBE` 查询中不包含子列。
* 1 — `DESCRIBE` 查询中包含子列。

**示例**

请参阅 [DESCRIBE](/docs/zh/reference/statements/describe-table) 语句示例。

<div id="describe_include_virtual_columns">
  ## describe\_include\_virtual\_columns
</div>

<SettingsInfoBlock type="Bool" default_value="0" />

如果为 true，则 DESCRIBE 查询结果中将包含表的虚拟列