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Why empty string is returned as 0
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General information
Forum:
Microsoft SQL Server
Category:
Other
Environment versions
SQL Server:
SQL Server 2005
Miscellaneous
Thread ID:
01544288
Message ID:
01544293
Views:
20
>>I have a simple stored procedure that declares a variable @ErrorMessage at the top as
>>
>>declare @ErrorMessage AS VARCHAR(100)
>>SET @ErrorMessage = ''
>>
>>
>>At the end of the procedure I return this value as
>>
>>RETURN @ErrorMessage
>>
>>
>>The value is set to the @ErrorMessage in CATCH block. Then I test this procesure in a query window as following
>>
>>declare @retval as varchar(100)
>>EXECUTE @retval = myproced param1, param2
>>print @retval
>>
>>
>>But if there is no problem within the procedure, the value of @retval showing in the query window is 0 (zero). Why not empty string?
>
>Return values in stored procedures are used only for the status of the SP (succeeded/failed) and they can only be integers. For everything else you need to use OUTPUT parameters.

Thank you. I will try the Output.
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