morrySnow commented on code in PR #1849:
URL: https://github.com/apache/doris-website/pull/1849#discussion_r1920072700
##########
docs/sql-manual/sql-functions/scalar-functions/string-functions/append-trailing-char-if-absent.md:
##########
@@ -24,37 +24,37 @@ specific language governing permissions and limitations
under the License.
-->
-## append_trailing_char_if_absent
+## Description
-### description
+Used to add a specific character (such as a space, a specific symbol, etc.) to
the end of a string if the character does not exist at the end of the string.
The function is to ensure that the string ends with a specific character.
-#### Syntax
+## Syntax
-`VARCHAR append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)`
+```sql
+append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)
Review Comment:
1. 函数名大写
2. 不需要参数类型
3. 参数用尖括号包起来
```suggestion
APPEND_TRAILING_CHAR_IF_ABSENT(<str>, <trailing_char>)
```
##########
docs/sql-manual/sql-functions/scalar-functions/string-functions/append-trailing-char-if-absent.md:
##########
@@ -24,37 +24,37 @@ specific language governing permissions and limitations
under the License.
-->
-## append_trailing_char_if_absent
+## Description
-### description
+Used to add a specific character (such as a space, a specific symbol, etc.) to
the end of a string if the character does not exist at the end of the string.
The function is to ensure that the string ends with a specific character.
-#### Syntax
+## Syntax
-`VARCHAR append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)`
+```sql
+append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)
+```
-If the @str string is non-empty and does not contain the @trailing_char
character at the end, it appends the @trailing_char character to the end.
-@trailing_char contains only one character, and it will return NULL if
contains more than one character
+## Parameters
-### example
+| Parameters | Description |
+| -- |-----------------------------|
+| `str` | Target string to be judged |
+| `trailing_char` | Character to be added to the end of the string (if the
character does not exist) |
Review Comment:
```suggestion
| `<trailing_char>` | Character to be added to the end of the string (if the
character does not exist) |
```
##########
docs/sql-manual/sql-functions/scalar-functions/string-functions/concat.md:
##########
@@ -24,38 +24,40 @@ specific language governing permissions and limitations
under the License.
-->
-## concat
-### Description
-#### Syntax
+## Description
-`VARCHAR concat (VARCHAR,...)`
+Concatenate multiple strings. Special cases:
+- If any of the parameter values is NULL, the result returned is NULL
-Connect multiple strings and return NULL if any of the parameters is NULL
-
-### example
+## Syntax
+```sql
+concat(STRING <expr1> [ ,STRING <expr2> ... ])
```
-mysql> select concat("a", "b");
-+------------------+
-| concat('a', 'b') |
-+------------------+
-| ab |
-+------------------+
-
-mysql> select concat("a", "b", "c");
-+-----------------------+
-| concat('a', 'b', 'c') |
-+-----------------------+
-| abc |
-+-----------------------+
-
-mysql> select concat("a", null, "c");
-+------------------------+
-| concat('a', NULL, 'c') |
-+------------------------+
-| NULL |
-+------------------------+
+
+## Parameters
+
+| Parameter | Description |
+| -- |--------------|
+| `<expr1>` | The string to be concatenated |
Review Comment:
```suggestion
| `<expr>` | The string to be concatenated |
```
##########
docs/sql-manual/sql-functions/scalar-functions/string-functions/concat.md:
##########
@@ -24,38 +24,40 @@ specific language governing permissions and limitations
under the License.
-->
-## concat
-### Description
-#### Syntax
+## Description
-`VARCHAR concat (VARCHAR,...)`
+Concatenate multiple strings. Special cases:
+- If any of the parameter values is NULL, the result returned is NULL
-Connect multiple strings and return NULL if any of the parameters is NULL
-
-### example
+## Syntax
+```sql
+concat(STRING <expr1> [ ,STRING <expr2> ... ])
Review Comment:
```suggestion
CONCAT(<expr> [ , <expr> ... ])
```
##########
docs/sql-manual/sql-functions/scalar-functions/string-functions/append-trailing-char-if-absent.md:
##########
@@ -24,37 +24,37 @@ specific language governing permissions and limitations
under the License.
-->
-## append_trailing_char_if_absent
+## Description
-### description
+Used to add a specific character (such as a space, a specific symbol, etc.) to
the end of a string if the character does not exist at the end of the string.
The function is to ensure that the string ends with a specific character.
-#### Syntax
+## Syntax
-`VARCHAR append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)`
+```sql
+append_trailing_char_if_absent(VARCHAR str, VARCHAR trailing_char)
+```
-If the @str string is non-empty and does not contain the @trailing_char
character at the end, it appends the @trailing_char character to the end.
-@trailing_char contains only one character, and it will return NULL if
contains more than one character
+## Parameters
-### example
+| Parameters | Description |
+| -- |-----------------------------|
+| `str` | Target string to be judged |
Review Comment:
```suggestion
| `<str>` | Target string to be judged |
```
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