return value - Stored procedure for adding an application user MS SQL 2012 -


i trying write stored procedure 1 of queries adding users table. having difficulty capturing return values during success , failure.

the username column in user table defined have unique constraint.

this outline of stored procedure. stored procedure name: createuser

parameters

@username varchar(64)

@firstname varchar(64)

@lastname varchar(64)

@md5password varchar(64)

@access_control int

returns identity, -1 if user exists or (-@@error) (integer)

below stored procedure have written can't seem capture return value part.

alter procedure [dbo].[createuser]   -- add parameters stored procedure here @username varchar(64) = null,  @firstname varchar(64) = null, @lastname varchar(64) = null, @md5password varchar(255) = null, @access_control int = -10 declare @return_code int begin -- set nocount on added prevent result sets -- interfering select statements. set nocount on;   -- insert statements procedure here insert [dbo].[user] ([username], [firstname], [lastname], [password], [access_control]) values (@username, @firstname, @lastname, @md5password, @access_control)  if(@@error <> 0 )     begin         print n'user name exists. username must unique' + @@error         set @return_code = -1     end  else     begin         set @return_code = scope_identity()     end  return @return_code  end

i want set return value identity in case of success. -1 if user exists or error value if internal error occurs. how can capture behavior in stored procedure. in advance.


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