diff --git a/docs/en/12-taos-sql/10-function.md b/docs/en/12-taos-sql/10-function.md
index fbdae3445b..b4f1cf65da 100644
--- a/docs/en/12-taos-sql/10-function.md
+++ b/docs/en/12-taos-sql/10-function.md
@@ -491,6 +491,8 @@ TO_CHAR(ts, format_str_literal)
 
 **Description**: Convert a ts column to string as the format specified
 
+**Version**: Since ver-3.2.2.0
+
 **Return value type**: VARCHAR
 
 **Applicable column types**: TIMESTAMP
@@ -550,6 +552,8 @@ TO_TIMESTAMP(ts_str_literal, format_str_literal)
 
 **Description**: Convert a formated timestamp string to a timestamp
 
+**Version**: Since ver-3.2.2.0
+
 **Return value type**: TIMESTAMP
 
 **Applicable column types**: VARCHAR
diff --git a/docs/zh/12-taos-sql/10-function.md b/docs/zh/12-taos-sql/10-function.md
index 66322d55f1..0482022d95 100644
--- a/docs/zh/12-taos-sql/10-function.md
+++ b/docs/zh/12-taos-sql/10-function.md
@@ -491,6 +491,8 @@ TO_CHAR(ts, format_str_literal)
 
 **功能说明**: 将timestamp类型按照指定格式转换为字符串
 
+**版本**: ver-3.2.2.0
+
 **返回结果数据类型**: VARCHAR
 
 **应用字段**: TIMESTAMP
@@ -550,6 +552,8 @@ TO_TIMESTAMP(ts_str_literal, format_str_literal)
 
 **功能说明**: 将字符串按照指定格式转化为时间戳.
 
+**版本**: ver-3.2.2.0
+
 **返回结果数据类型**: TIMESTAMP
 
 **应用字段**: VARCHAR