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POOptional parameters in SQL stored procedure
 

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  1. POOptional parameters in SQL stored procedure
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    <p>I am trying to create a stored procedure that has optional parameters. I followed the instructions listed <a href="http://weblogs.asp.net/stanleygu/archive/2010/02/08/solution-5-implementing-optional-parameters-in-t-sql-stored-procedures.aspx" rel="nofollow noreferrer">here</a>. I also referenced this <a href="https://stackoverflow.com/questions/3415582/how-can-i-use-optional-parameters-in-a-t-sql-stored-procedure">SO question</a>. However I keep receiving the following error:</p> <blockquote> <p>Error converting data type varchar to int.</p> </blockquote> <p>It works when I execute it as </p> <pre><code>EXEC sp_get_user {id#} </code></pre> <p>or </p> <pre><code>EXEC sp_get_user NULL, {username} </code></pre> <p>but fails with </p> <pre><code>EXEC sp_get_user {username} </code></pre> <p><strong>Stored Procedure</strong></p> <pre><code>@id int = NULL, @username nvarchar(50) = NULL SELECT username = COALESCE(a.Username, b.Username), password = COALESCE(a.Password, b.Password), signup_date = COALESCE(a.SignedUpOn, b.Signup_Date) FROM table1 a FULL OUTER JOIN table 2 b ON a.ID = b.ID WHERE ((a.ID = @id OR @id IS NULL) AND (a.Username = @username OR @username IS NULL) OR (b.ID = @id OR @id IS NULL) AND (b.Username = @username OR @username IS NULL)) </code></pre> <p>I have tried adding the <code>OPTION(RECOMPILE)</code> and had no success. I want to make this dynamic so other developers can call this SP without having to specify all parameters each time. They will be connecting via LINQ if that makes a difference.</p>
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