执行一个功能。无法打印输出

Question

我最近遇到了下面的函数来在计算器：

CREATE FUNCTION dbo.UrlDecode(@url varchar(3072)) 
RETURNS varchar(3072) 
AS 
BEGIN 
    DECLARE @count int, @c char(1), @cenc char(2), @i int, @urlReturn varchar(3072) 
    SET @count = Len(@url) 
    SET @i = 1 
    SET @urlReturn = '' 
    WHILE (@i <= @count) 
    BEGIN 
     SET @c = substring(@url, @i, 1) 
     IF @c LIKE '[!%]' ESCAPE '!' 
     BEGIN 
      SET @cenc = substring(@url, @i + 1, 2) 
      SET @c = CHAR(CASE WHEN SUBSTRING(@cenc, 1, 1) LIKE '[0-9]' 
           THEN CAST(SUBSTRING(@cenc, 1, 1) as int) 
           ELSE CAST(ASCII(UPPER(SUBSTRING(@cenc, 1, 1)))-55 as int) 
          END * 16 + 
          CASE WHEN SUBSTRING(@cenc, 2, 1) LIKE '[0-9]' 
           THEN CAST(SUBSTRING(@cenc, 2, 1) as int) 
           ELSE CAST(ASCII(UPPER(SUBSTRING(@cenc, 2, 1)))-55 as int) 
          END) 
      SET @urlReturn = @urlReturn + @c 
      SET @i = @i + 2 
     END 
     ELSE 
     BEGIN 
      SET @urlReturn = @urlReturn + @c 
     END 
     SET @i = @i +1 
    END 
    RETURN @urlReturn 
END 
GO 


I am trying to pass the following URL as an input to get the decoded URL as output using the following command: 

DECLARE @urlReturn nvarchar(3072); 
EXEC dbo.UrlDecode2 @url = 'https%3a%2f%2fin.mathworks.com'; 
PRINT @urlReturn; 
GO 

最初尝试了以下内容：

exec dbo.UrlDecode2 @url = 'https%3a%2f%2fin.mathworks.com'; 
go 

功能的URL解码编码的部分。我对PL/SQL完全陌生。有人能告诉我我哪里出错了，以及如何打印解码的URL。

Answer 1

Declare @URL varchar(500) 
Set @URL = dbo.UrlDecode2('https%3a%2f%2fin.mathworks.com') 

返回

https://in.mathworks.com 

或者内选择

Select URL = dbo.UrlDecode2('https%3a%2f%2fin.mathworks.com')