在 SQL 服务器存储过程中将 varchar 值 '%' 转换为数据类型 int 时转换失败

Question

I am working on a SQL Server stored procedure. I have table with these columns

BusName(NVarchar(100) not null)
BusNumber(int, null) 

in my main Bus table.

I am trying to implement search functionality where user can either pass BusName or BusNumber to get all the results stored in main Bus table

I have implemented this stored procedure to handle the search functionality:

CREATE PROCEDURE [dbo].[spGetAllBus]
    @BusName VARCHAR(512),
    @BusNo INT
AS
    SET NOCOUNT ON;  
BEGIN
     SELECT 
         [BusName], 
         [ManagingOwner],
         [Operator],
         [CurrentService], [CurrentRate],
         [BusNumber],
         [MarketRate],
         [EarliestRdel]
     FROM 
         [dbo].[Bus] 
     WHERE 
         [BusName] LIKE '%' + @BusName + '%' 
         OR [BusNumber] LIKE '%' + @BusNo + '%' 
END

When I execute this stored procedure like this:

DECLARE @return_value int

EXEC    @return_value = [dbo].[spGetAllBus]
        @BusName = N'emma',
        @BusNo = NULL
SELECT  'Return Value' = @return_value

I get an error

Conversion failed when converting the varchar value '%' to data type int.

I am struggling to find the root cause as I am not having any conversions in the code. Can someone help me here. Any help would be appreciated. Thanks

Answer 1

You can alter your store procedure like below if your BusNumber column's type is INT.

ALTER PROCEDURE [dbo].[spGetAllBus]
   @BusName VARCHAR(512),
   @BusNo INT
AS
   SET NOCOUNT ON;  
BEGIN
 SELECT 
     [BusName], 
     [ManagingOwner],
     [Operator],
     [CurrentService], [CurrentRate],
     [BusNumber],
     [MarketRate],
     [EarliestRdel]
 FROM 
     [dbo].[Bus] 
 WHERE 
     [BusName] LIKE '%' + @BusName + '%' 
     OR [BusNumber] = @BusNo 
END