diff --git a/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md b/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md
new file mode 100644
index 0000000000000..256ce255cb50b
--- /dev/null
+++ b/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md
@@ -0,0 +1,98 @@
+---
+{
+    "title": "ADD_TIME",
+    "language": "en"
+}
+---
+
+## Description
+
+Adds the specified time interval to a date/time or time expression. If the second parameter is negative, it is equivalent to subtracting the interval from the first parameter.
+
+## Syntax
+
+```sql
+ADD_TIME(`<date_or_time_expr>`, `<time>`)
+```
+
+## Parameters
+
+| Parameter             | Description |
+| ---------------------| ----------- |
+| `<date_or_time_expr>`| A valid date expression. Supports input of datetime/date/time types. If the type is date, it will be converted to the start time of the day (00:00:00). For specific datetime/time formats, see [datetime conversion](../../../../../docs/sql-manual/basic-element/sql-data-types/conversion/datetime-conversion) and [time conversion](../../../../../docs/sql-manual/basic-element/sql-data-types/conversion/time-conversion). |
+| `<time>`             | A valid time expression, representing the time value to be added to `<date_or_time_expr>`. If negative, it means subtraction. Supports input of time type. |
+
+## Return Value
+
+Returns the result of adding `<time>` to `<date_or_time_expr>`. The return type depends on the type of the first parameter:
+- If the first parameter is of datetime type, returns datetime type.
+- If the first parameter is of time type, returns time type.
+
+Special cases:
+- If any input parameter is null, returns null.
+- If the first parameter is of time type and the result exceeds the time type range, returns the maximum (or minimum) time value.
+- If the first parameter is of datetime type and the result exceeds the datetime type range, an error is thrown.
+
+## Examples
+
+```sql
+-- Add time when the first parameter is datetime type
+SELECT ADD_TIME('2025-09-19 12:00:00', '01:30:00'); 
++---------------------------------------------+
+| ADD_TIME('2025-09-19 12:00:00', '01:30:00') |
++---------------------------------------------+
+| 2025-09-19 13:30:00                         |
++---------------------------------------------+
+
+-- Add time when the first parameter is time type
+SELECT ADD_TIME(cast('12:15:20' as time), '00:10:40'); 
++------------------------------------------------+
+| ADD_TIME(cast('12:15:20' as time), '00:10:40') |
++------------------------------------------------+
+| 12:26:00                                       |
++------------------------------------------------+   
+         
+-- NULL parameter test
+SELECT ADD_TIME(NULL, '01:00:00');
++----------------------------+
+| ADD_TIME(NULL, '01:00:00') |
++----------------------------+
+| NULL                       |
++----------------------------+    
+
+SELECT ADD_TIME('2025-09-19 12:00:00', NULL); 
++---------------------------------------+
+| ADD_TIME('2025-09-19 12:00:00', NULL) |
++---------------------------------------+
+| NULL                                  |
++---------------------------------------+
+
+SELECT ADD_TIME(NULL, NULL);
++----------------------+
+| ADD_TIME(NULL, NULL) |
++----------------------+
+| NULL                 |
++----------------------+                        
+
+-- Time type out-of-range test (returns max/min value)
+SELECT ADD_TIME(cast('835:30:00' as time), '21:00:00'); 
++-------------------------------------------------+
+| ADD_TIME(cast('835:30:00' as time), '21:00:00') |
++-------------------------------------------------+
+| 838:59:59                                       |
++-------------------------------------------------+
+
+SELECT ADD_TIME(cast('-832:30:00' as time), '-31:00:00');   
++---------------------------------------------------+
+| ADD_TIME(cast('-832:30:00' as time), '-31:00:00') |
++---------------------------------------------------+
+| -838:59:59                                        |
++---------------------------------------------------+       
+
+-- Datetime type out-of-range test (throws error)
+SELECT ADD_TIME('9999-12-31 23:59:59', '00:00:01');  
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function add_time
+
+SELECT ADD_TIME('0000-01-01 00:00:00', '-00:00:01');
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function add_time
+```
diff --git a/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md b/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md
new file mode 100644
index 0000000000000..b51bd4a0f7115
--- /dev/null
+++ b/docs/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md
@@ -0,0 +1,98 @@
+---
+{
+    "title": "SUB_TIME",
+    "language": "en"
+}
+---
+
+## Description
+
+Subtracts the specified time interval from a date/time or time expression. If the second parameter is negative, it is equivalent to adding the interval to the first parameter.
+
+## Syntax
+
+```sql
+SUB_TIME(`<date_or_time_expr>`, `<time>`)
+```
+
+## Parameters
+
+| Parameter             | Description |
+| ---------------------| ----------- |
+| `<date_or_time_expr>`| A valid date expression. Supports input of datetime/date/time types. If the type is date, it will be converted to the start time of the day (00:00:00). For specific datetime/time formats, see [datetime conversion](../../../../../docs/sql-manual/basic-element/sql-data-types/conversion/datetime-conversion) and [time conversion](../../../../../docs/sql-manual/basic-element/sql-data-types/conversion/time-conversion). |
+| `<time>`             | A valid time expression, representing the time value to be subtracted from `<date_or_time_expr>`. If negative, it means addition. Supports input of time type. |
+
+## Return Value
+
+Returns the result of subtracting `<time>` from `<date_or_time_expr>`. The return type depends on the type of the first parameter:
+- If the first parameter is of datetime type, returns datetime type.
+- If the first parameter is of time type, returns time type.
+
+Special cases:
+- If any input parameter is null, returns null.
+- If the first parameter is of time type and the result exceeds the time type range, returns the maximum (or minimum) time value.
+- If the first parameter is of datetime type and the result exceeds the datetime type range, an error is thrown.
+
+## Examples
+
+```sql
+-- Subtract time when the first parameter is datetime type
+SELECT SUB_TIME('2025-09-19 12:00:00', '01:30:00'); 
++---------------------------------------------+
+| SUB_TIME('2025-09-19 12:00:00', '01:30:00') |
++---------------------------------------------+
+| 2025-09-19 10:30:00                         |
++---------------------------------------------+
+
+-- Subtract time when the first parameter is time type
+SELECT SUB_TIME(cast('12:15:20' as time), '00:10:40'); 
++------------------------------------------------+
+| SUB_TIME(cast('12:15:20' as time), '00:10:40') |
++------------------------------------------------+
+| 12:04:40                                       |
++------------------------------------------------+   
+         
+-- NULL parameter test
+SELECT SUB_TIME(NULL, '01:00:00');
++----------------------------+
+| SUB_TIME(NULL, '01:00:00') |
++----------------------------+
+| NULL                       |
++----------------------------+    
+
+SELECT SUB_TIME('2025-09-19 12:00:00', NULL); 
++---------------------------------------+
+| SUB_TIME('2025-09-19 12:00:00', NULL) |
++---------------------------------------+
+| NULL                                  |
++---------------------------------------+
+
+SELECT SUB_TIME(NULL, NULL);
++----------------------+
+| SUB_TIME(NULL, NULL) |
++----------------------+
+| NULL                 |
++----------------------+                        
+
+-- Time type out-of-range test (returns max/min value)
+SELECT SUB_TIME(cast('835:30:00' as time), '-21:00:00');
++--------------------------------------------------+
+| SUB_TIME(cast('835:30:00' as time), '-21:00:00') |
++--------------------------------------------------+
+| 838:59:59                                        |
++--------------------------------------------------+
+
+SELECT SUB_TIME(cast('-832:30:00' as time), '31:00:00');   
++---------------------------------------------------+
+| SUB_TIME(cast('-832:30:00' as time), '31:00:00') |
++---------------------------------------------------+
+| -838:59:59                                        |
++---------------------------------------------------+       
+
+-- Datetime type out-of-range test (throws error)
+SELECT SUB_TIME('0000-01-01 00:00:00', '00:00:01');  
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function sub_time
+
+SELECT SUB_TIME('9999-12-31 23:59:59', '-00:00:01');
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function sub_time
+```
diff --git a/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md b/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md
new file mode 100644
index 0000000000000..d9ed1e2fd4dde
--- /dev/null
+++ b/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/add-time.md
@@ -0,0 +1,101 @@
+---
+{
+    "title": "ADD_TIME",
+    "language": "zh-CN"
+}
+---
+
+## 描述
+
+将给定的时间间隔添加到日期时间/时间表达式上。若第二个参数为负数，则等价于从第一个参数中减去该时间间隔。
+
+
+## 语法
+
+```sql
+ADD_TIME(`<date_or_time_expr>`, `<time>`)
+```
+
+## 参数
+
+| 参数 | 说明 |
+| -- | -- |
+| `<date_or_time_expr>` | 参数是合法的日期表达式，支持输入 datetime/date/time 类型,date 类型会转换为对应日期的一天起始时间 00:00:00 ,具体 datetime//time 格式请查看  [datetime 的转换](../../../../../current/sql-manual/basic-element/sql-data-types/conversion/datetime-conversion) 和 [time的转换](../../../../../current/sql-manual/basic-element/sql-data-types/conversion/time-conversion) |
+|  `<time>`        |  参数为合法的时间表达式，表示增加到`<date_or_time_expr>` 上面的时间值，若为负数，则表示减少，支持输入 time 类型  |
+
+## 返回值
+
+返回 `<date_or_time_expr>` 添加 `<time>` 时间值之后的结果，根据第一个参数类型返回不同的类型
+- 若第一个参数为 datetime 类型，则返回 datetime 类型
+- 若第一个参数为 time 类型，则返回 time 类型
+
+特殊情况:
+- 若输入参数包含 null ,返回 null
+- 若第一个参数类型为 time 类型，且计算结果超出 time 类型范围，则返回 time 类型最大（最小值）
+- 若第一个参数类型为 datetime 类型，且计算结果超出 datetime 类型，则跑出错误
+
+
+## 举例
+
+```sql
+-- 增加时间当第一个参数为 datetime 类型
+SELECT ADD_TIME('2025-09-19 12:00:00', '01:30:00'); 
++---------------------------------------------+
+| ADD_TIME('2025-09-19 12:00:00', '01:30:00') |
++---------------------------------------------+
+| 2025-09-19 13:30:00                         |
++---------------------------------------------+
+
+-- 增加时间当第一个参数为 time 类型
+SELECT ADD_TIME(cast('12:15:20' as time), '00:10:40'); 
++------------------------------------------------+
+| ADD_TIME(cast('12:15:20' as time), '00:10:40') |
++------------------------------------------------+
+| 12:26:00                                       |
++------------------------------------------------+   
+         
+-- NULL 参数测试
+SELECT ADD_TIME(NULL, '01:00:00');
++----------------------------+
+| ADD_TIME(NULL, '01:00:00') |
++----------------------------+
+| NULL                       |
++----------------------------+    
+
+SELECT ADD_TIME('2025-09-19 12:00:00', NULL); 
++---------------------------------------+
+| ADD_TIME('2025-09-19 12:00:00', NULL) |
++---------------------------------------+
+| NULL                                  |
++---------------------------------------+
+
+SELECT ADD_TIME(NULL, NULL);
++----------------------+
+| ADD_TIME(NULL, NULL) |
++----------------------+
+| NULL                 |
++----------------------+                        
+
+-- time 类型超出范围测试（返回最大/最小值）
+SELECT ADD_TIME(cast('835:30:00' as time), '21:00:00'); 
++-------------------------------------------------+
+| ADD_TIME(cast('835:30:00' as time), '21:00:00') |
++-------------------------------------------------+
+| 838:59:59                                       |
++-------------------------------------------------+
+
+
+SELECT ADD_TIME(cast('-832:30:00' as time), '-31:00:00');   
++---------------------------------------------------+
+| ADD_TIME(cast('-832:30:00' as time), '-31:00:00') |
++---------------------------------------------------+
+| -838:59:59                                        |
++---------------------------------------------------+       
+
+-- datetime 类型超出范围测试（抛出错误）
+SELECT ADD_TIME('9999-12-31 23:59:59', '00:00:01');  
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function add_time
+
+SELECT ADD_TIME('0000-01-01 00:00:00', '-00:00:01');
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function add_time
+```
diff --git a/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md b/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md
new file mode 100644
index 0000000000000..a6814ebf696f9
--- /dev/null
+++ b/i18n/zh-CN/docusaurus-plugin-content-docs/current/sql-manual/sql-functions/scalar-functions/date-time-functions/sub-time.md
@@ -0,0 +1,99 @@
+---
+{
+    "title": "SUB_TIME",
+    "language": "zh-CN"
+}
+---
+
+## 描述
+
+从给定的日期时间/时间表达式中减去指定的时间间隔。若第二个参数为负数，则等价于向第一个参数中添加该时间间隔。
+
+## 语法
+
+```sql
+SUB_TIME(`<date_or_time_expr>`, `<time>`)
+```
+
+## 参数
+
+| 参数 | 说明 |
+| -- | -- |
+| `<date_or_time_expr>` | 参数是合法的日期表达式，支持输入 datetime/date/time 类型,date 类型会转换为对应日期的一天起始时间 00:00:00 ,具体 datetime//time 格式请查看  [datetime 的转换](../../../../../current/sql-manual/basic-element/sql-data-types/conversion/datetime-conversion) 和 [time的转换](../../../../../current/sql-manual/basic-element/sql-data-types/conversion/time-conversion) |
+|  `<time>`        |  参数为合法的时间表达式，表示从`<date_or_time_expr>` 中减去的时间值，若为负数，则表示增加，支持输入 time 类型  |
+
+## 返回值
+
+返回 `<date_or_time_expr>` 减去 `<time>` 时间值之后的结果，根据第一个参数类型返回不同的类型
+- 若第一个参数为 datetime 类型，则返回 datetime 类型
+- 若第一个参数为 time 类型，则返回 time 类型
+
+特殊情况:
+- 若输入参数包含 null ,返回 null
+- 若第一个参数类型为 time 类型，且计算结果超出 time 类型范围，则返回 time 类型最大（最小值）
+- 若第一个参数类型为 datetime 类型，且计算结果超出 datetime 类型，则跑出错误
+
+## 举例
+
+```sql
+-- 减少时间当第一个参数为 datetime 类型
+SELECT SUB_TIME('2025-09-19 12:00:00', '01:30:00'); 
++---------------------------------------------+
+| SUB_TIME('2025-09-19 12:00:00', '01:30:00') |
++---------------------------------------------+
+| 2025-09-19 10:30:00                         |
++---------------------------------------------+
+
+-- 减少时间当第一个参数为 time 类型
+SELECT SUB_TIME(cast('12:15:20' as time), '00:10:40'); 
++------------------------------------------------+
+| SUB_TIME(cast('12:15:20' as time), '00:10:40') |
++------------------------------------------------+
+| 12:04:40                                       |
++------------------------------------------------+   
+         
+-- NULL 参数测试
+SELECT SUB_TIME(NULL, '01:00:00');
++----------------------------+
+| SUB_TIME(NULL, '01:00:00') |
++----------------------------+
+| NULL                       |
++----------------------------+    
+
+SELECT SUB_TIME('2025-09-19 12:00:00', NULL); 
++---------------------------------------+
+| SUB_TIME('2025-09-19 12:00:00', NULL) |
++---------------------------------------+
+| NULL                                  |
++---------------------------------------+
+
+SELECT SUB_TIME(NULL, NULL);
++----------------------+
+| SUB_TIME(NULL, NULL) |
++----------------------+
+| NULL                 |
++----------------------+                        
+
+-- time 类型超出范围测试（返回最大/最小值）
+SELECT SUB_TIME(cast('835:30:00' as time), '-21:00:00');
++--------------------------------------------------+
+| SUB_TIME(cast('835:30:00' as time), '-21:00:00') |
++--------------------------------------------------+
+| 838:59:59                                        |
++--------------------------------------------------+
+
+
+SELECT SUB_TIME(cast('-832:30:00' as time), '31:00:00');   
++---------------------------------------------------+
+| SUB_TIME(cast('-832:30:00' as time), '31:00:00') |
++---------------------------------------------------+
+| -838:59:59                                        |
++---------------------------------------------------+       
+
+-- datetime 类型超出范围测试（抛出错误）
+SELECT SUB_TIME('0000-01-01 00:00:00', '00:00:01');  
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function sub_time
+
+SELECT SUB_TIME('9999-12-31 23:59:59', '-00:00:01');
+ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[INVALID_ARGUMENT]datetime value is out of range in function sub_time
+```