Hisoka-X commented on code in PR #9711:
URL: https://github.com/apache/seatunnel/pull/9711#discussion_r2284988887


##########
docs/en/transform-v2/sql-functions.md:
##########
@@ -6,1039 +6,878 @@
 
 ### ASCII
 
-```ASCII(string)```
+ ```ASCII(string) -> INT```
 
-Returns the ```ASCII``` value of the first character in the string. This 
method returns an int.
+ Returns the `ASCII` value of the first character in the string.
 
 Example:
-
 ASCII('Hi')
 
 ### BIT_LENGTH
 
-```BIT_LENGTH(bytes)```
+ ```BIT_LENGTH(bytes) -> LONG```
 
-Returns the number of bits in a binary string. This method returns a long.
+ Returns the number of bits in a binary string.
 
 Example:
-
 BIT_LENGTH(NAME)
 
 ### CHAR_LENGTH / LENGTH
 
-```CHAR_LENGTH | LENGTH (string)```
+ ```CHAR_LENGTH | LENGTH (string) -> LONG```
 
-Returns the number of characters in a character string. This method returns a 
long.
+ Returns the number of characters in a character string.
 
 Example:
-
 CHAR_LENGTH(NAME)
 
 ### OCTET_LENGTH
 
-```OCTET_LENGTH(bytes)```
+ ```OCTET_LENGTH(bytes) -> LONG```
 
-Returns the number of bytes in a binary string. This method returns a long.
+ Returns the number of bytes in a binary string.
 
 Example:
-
 OCTET_LENGTH(NAME)
 
 ### CHAR / CHR
 
-```CHAR | CHR (int)```
+ ```CHAR | CHR (int) -> STRING```
 
-Returns the character that represents the ASCII value. This method returns a 
string.
+ Returns the character that represents the ASCII value.
 
 Example:
-
 CHAR(65)
 
 ### CONCAT
 
-```CONCAT(string, string[, string ...] )```
+ ```CONCAT(string, string[, string ...]) -> STRING```
 
-Combines strings. Unlike with the operator ```||```, **NULL** parameters are 
ignored, and do not cause the result to become **NULL**. If all parameters are 
NULL the result is an empty string. This method returns a string.

Review Comment:
   @jihun4452 



##########
docs/en/transform-v2/sql-functions.md:
##########
@@ -6,1039 +6,878 @@
 
 ### ASCII
 
-```ASCII(string)```
+ ```ASCII(string) -> INT```
 
-Returns the ```ASCII``` value of the first character in the string. This 
method returns an int.
+ Returns the `ASCII` value of the first character in the string.
 
 Example:
-
 ASCII('Hi')
 
 ### BIT_LENGTH
 
-```BIT_LENGTH(bytes)```
+ ```BIT_LENGTH(bytes) -> LONG```
 
-Returns the number of bits in a binary string. This method returns a long.
+ Returns the number of bits in a binary string.
 
 Example:
-
 BIT_LENGTH(NAME)
 
 ### CHAR_LENGTH / LENGTH
 
-```CHAR_LENGTH | LENGTH (string)```
+ ```CHAR_LENGTH | LENGTH (string) -> LONG```
 
-Returns the number of characters in a character string. This method returns a 
long.
+ Returns the number of characters in a character string.
 
 Example:
-
 CHAR_LENGTH(NAME)
 
 ### OCTET_LENGTH
 
-```OCTET_LENGTH(bytes)```
+ ```OCTET_LENGTH(bytes) -> LONG```
 
-Returns the number of bytes in a binary string. This method returns a long.
+ Returns the number of bytes in a binary string.
 
 Example:
-
 OCTET_LENGTH(NAME)
 
 ### CHAR / CHR
 
-```CHAR | CHR (int)```
+ ```CHAR | CHR (int) -> STRING```
 
-Returns the character that represents the ASCII value. This method returns a 
string.
+ Returns the character that represents the ASCII value.
 
 Example:
-
 CHAR(65)
 
 ### CONCAT
 
-```CONCAT(string, string[, string ...] )```
+ ```CONCAT(string, string[, string ...]) -> STRING```
 
-Combines strings. Unlike with the operator ```||```, **NULL** parameters are 
ignored, and do not cause the result to become **NULL**. If all parameters are 
NULL the result is an empty string. This method returns a string.
+ Combines strings. Unlike with the operator `||`, **NULL** parameters are 
ignored and do not cause the result to become **NULL**.
 
 Example:
-
 CONCAT(NAME, '_')
 
 ### CONCAT_WS
 
-```CONCAT_WS(separatorString, string, string[, string ...] )```
+ ```CONCAT_WS(separatorString, string, string[, string ...]) -> STRING```
 
-Combines strings with separator. If separator is **NULL** it is treated like 
an empty string. Other **NULL** parameters are ignored. Remaining **non-NULL** 
parameters, if any, are concatenated with the specified separator. If there are 
no remaining parameters the result is an empty string. This method returns a 
string.

Review Comment:
   @jihun4452 



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