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CREATE PROCEDURE sp_helpsrvrole @srvrolename sysname = NULL AS if @srvrolename is not null begin -- VALIDATE GIVEN NAME if not exists (select * from master.dbo.spt_values where name = @srvrolename and low = 0 and type = 'SRV') begin raiserror(15412, -1, -1, @srvrolename) return (1) end -- RESULT SET FOR SINGLE SERVER-ROLE select 'ServerRole' = v1.name, 'Description' = v2.name from master.dbo.spt_values v1, master.dbo.spt_values v2 where v1.name = @srvrolename and v1.low = 0 and v1.type = 'SRV' and v2.low = -1 and v2.type = 'SRV' and v1.number = v2.number end else begin -- RESULT SET FOR ALL SERVER-ROLES select 'ServerRole' = v1.name, 'Description' = v2.name from master.dbo.spt_values v1, master.dbo.spt_values v2 where v1.low = 0 and v1.type = 'SRV' and v2.low = -1 and v2.type = 'SRV' and v1.number = v2.number end return (0) -- sp_helpsrvrole