/*Author Hobbylu*/
            /*Reference from sybase procedures*/
            /*2005-07-01*/
            create procedure sp_helpsegment_me
            @segname varchar(30) = NULL /* segment name */
            as
            declare @segbit         int,    /* this is the bit version of the segment # */
            @segment        int,    /* the segment number of the segment */
            @free_pages     int,    /* unused pages in segment */
            @factor         float,  /* conversion factor to convert to MB */
            @clr_pages int, /* Space reserved for CLRs */
            @total_pages int, /* total allocatable log space */
            @used_pages int, /* allocated log space */
            @ismixedlog int /* mixed log & data database ? */
            if @@trancount = 0
            begin
            set chained off
            end
            set transaction isolation level 1
            set nocount on
            /*
            **  If no segment name given, get 'em all.
            */
            if @segname is null
            begin
            --Adaptive Server has expanded all '*' elements in the following statement
            select syssegments.segment, syssegments.name, syssegments.status
            from syssegments order by segment
            return (0)
            end
            /*
            **  Make sure the segment exists
            */
            if not exists (select *
            from syssegments
            where name = @segname)
            begin
            /* 17520, "There is no such segment as '%1!'." */
            raiserror 17520, @segname
            return (1)
            end
            /*
            **  Show the syssegment entry, then the fragments and size it is on,
            **  then any dependent objects in the database.
            */
            --Adaptive Server has expanded all '*' elements in the following statement
            select syssegments.segment, syssegments.name, syssegments.status
            from syssegments
            where name = @segname
            /*
            **  Set the bit position for the segment.
            */
            select @segment = segment
            from syssegments
            where name = @segname
            /*
            **  Now set the segments on @devname sysusages.
            */
            if (@segment < 31)
            select @segbit = power(2, @segment)
            else
            /*
            **  Since this is segment 31, power(2, 31) will overflow
            **  since segmap is an int.  We'll grab the machine-dependent
            **  bit mask from spt_values to set the right bit.
            */
            select @segbit = low
            from master.dbo.spt_values
            where type = "E"
            and number = 2
            /*
            ** Get factor for conversion of pages to megabytes from spt_values
            */
            select @factor = convert(float, low) / 1048576.0
            from master.dbo.spt_values
            where number = 1 and type = "E"
            select @total_pages = sum(u.size)
            from master.dbo.sysusages u
            where u.segmap & @segbit = @segbit
            and u.dbid = db_id()
            select @ismixedlog = status2 & 32768
            from master.dbo.sysdatabases where dbid = db_id()
            /*
            ** Select the sizes of the segments
            */
            if (@segbit = 4)
            begin
            select device = d.name,
            size = convert(varchar(20), round((sum(u.size) * @factor), 0)) + "MB"
            from master.dbo.sysusages u, master.dbo.sysdevices d
            where u.segmap & @segbit = @segbit
            and u.dbid = db_id()
            and d.status & 2 = 2
            and u.vstart between d.low and d.high
            group by d.name order by d.name
            select @clr_pages = lct_admin("reserved_for_rollbacks", db_id())
            select @free_pages = lct_admin("logsegment_freepages", db_id())
            - @clr_pages
            select free_pages = @free_pages
            if(@ismixedlog = 32768)
            begin
            /*
            ** For a mixed log and data database, we cannot
            ** deduce the log used space from the total space
            ** as it is mixed with data. So we take the expensive
            ** way by scanning syslogs.
            */
            select @used_pages = lct_admin("num_logpages", db_id())
            /* Account allocation pages as used pages */
            select @used_pages = @used_pages + (@total_pages / 256)
            end
            else
            begin
            /* Dedicated log database */
            select @used_pages = @total_pages - @free_pages
            - @clr_pages
            end
            end
            else
            begin
            select device = d.name,
            size = convert(varchar(20), round((sum(u.size) * @factor), 0)) + "MB",
            free_pages = sum(curunreservedpgs(db_id(), u.lstart, u.unreservedpgs))
            from master.dbo.sysusages u, master.dbo.sysdevices d
            where u.segmap & @segbit = @segbit
            and u.dbid = db_id()
            and d.status & 2 = 2
            and u.vstart between d.low and d.high
            group by d.name order by d.name
            select @free_pages = sum(curunreservedpgs(db_id(), u.lstart, u.unreservedpgs))
            from master.dbo.sysusages u
            where u.segmap & @segbit = @segbit
            and u.dbid = db_id()
            select @used_pages = @total_pages - @free_pages
            select @clr_pages = 0
            end
            /*
            ** Select the dependent objects
            */
            /*
            ** Print total_size, total_pages, free_pages, used_pages and reserved_pages
            */
            select total_size = convert(varchar(15),
            round(@total_pages * @factor, 0)) + "MB",
            total_pages = convert(char(15), @total_pages),
            free_pages = convert(char(15), @free_pages),
            used_pages = convert(char(15), @used_pages),
            reserved_pages = convert(char(15), @clr_pages)
            return (0)