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docs: remove to_unixtime references #1821

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29 changes: 0 additions & 29 deletions docs/reference/sql/functions/overview.md
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,6 @@ GreptimeDB provides:
* [date_add](#data_add)
* [date_sub](#data_sub)
* [date_format](#date_format)
* [to_unixtime](#to_unixtime)
* [timezone](#timezone)

#### date_add
Expand Down Expand Up @@ -163,34 +162,6 @@ SELECT date_format('2023-12-06 07:39:46.222'::TIMESTAMP, '%Y-%m-%d %H:%M:%S:%3f'

Supported specifiers refer to the [chrono::format::strftime](https://docs.rs/chrono/latest/chrono/format/strftime/index.html) module.

#### to_unixtime

* `to_unixtime(expression)` to convert the expression into the Unix timestamp in seconds. The argument can be integers (Unix timestamp in milliseconds), Timestamp, Date, DateTime, or String. If the argument is the string type, the function will first try to convert it into a DateTime, Timestamp, or Date.

```sql
select to_unixtime('2023-03-01T06:35:02Z');
```

```
+-------------------------------------------+
| to_unixtime(Utf8("2023-03-01T06:35:02Z")) |
+-------------------------------------------+
| 1677652502 |
+-------------------------------------------+
```

```sql
select to_unixtime('2023-03-01'::date);
```

```
+---------------------------------+
| to_unixtime(Utf8("2023-03-01")) |
+---------------------------------+
| 1677628800 |
+---------------------------------+
```

#### timezone

* `timezone()` to retrieve the current session timezone:
Expand Down
29 changes: 0 additions & 29 deletions i18n/zh/docusaurus-plugin-content-docs/current/reference/sql/functions/overview.md
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Expand Up @@ -104,7 +104,6 @@ DataFusion [时间和日期函数](./df-functions.md#time-and-date-functions)。
* [date_add](#data_add)
* [date_sub](#data_sub)
* [date_format](#date_format)
* [to_unixtime](#to_unixtime)
* [timezone](#timezone)

#### date_add
Expand Down Expand Up @@ -159,34 +158,6 @@ SELECT date_format('2023-12-06 07:39:46.222'::TIMESTAMP, '%Y-%m-%d %H:%M:%S:%3f'

支持的格式化符号请参阅 [chrono::format::strftime](https://docs.rs/chrono/latest/chrono/format/strftime/index.html) 模块。

#### to_unixtime

* `to_unixtime(expression)` 将表达式转换为 Unix 时间戳（秒）。参数可以是整数（毫秒 Unix 时间戳）、Timestamp、Date、DateTime 或字符串类型。如果参数是字符串类型，函数将首先尝试将其转换为 DateTime、Timestamp 或 Date。

```sql
select to_unixtime('2023-03-01T06:35:02Z');
```

```
+-------------------------------------------+
| to_unixtime(Utf8("2023-03-01T06:35:02Z")) |
+-------------------------------------------+
| 1677652502 |
+-------------------------------------------+
```

```sql
select to_unixtime('2023-03-01'::date);
```

```
+---------------------------------+
| to_unixtime(Utf8("2023-03-01")) |
+---------------------------------+
| 1677628800 |
+---------------------------------+
```

#### timezone

* `timezone()` 查询当前会话时区：
Expand Down