實用的儲存過程之一 (轉)[@more@]

筆者工作的公司採用的是Server，每天都要處理大量的資料，由於筆者進公司的時間比較晚，公司現有的大部分的都是以前的程式設計師留下的，因為他們沒有相關的文件，筆者對於後臺資料庫的很多表的結構和資料都不甚瞭解，給日常的維護造成了很大的麻煩。

在對後臺資料庫進行研究的過程中，我需要得到資料庫的某些相關資訊，比如，我希望知道各個表佔用多少空間，並且排列出來，可以讓我知道哪些表比較大，資料比較多等等——我相信，這可能也是不少資料庫管理員所關心的問題，所以我決心做一個通用的過程。我對的儲存過程sp_spaceused加了一些改動，以適合我的要求。希望這個儲存過程能對大家有些幫助。儲存過程如下：

if exists( name from syss where name='spaceused' and type='p')

Drop procedure spaceused

GO

create procedure spaceused

as

begin

:namespace prefix = o ns = "urn:schemas--com::office" />

declare @id int -- The object id of @objname.

declare @type character(2) -- The object type.

declare @pages int -- Working variable for size calc.

declare @name sysname

declare @dbsize dec(15,0)

declare @logsize dec(15)

declare @bytesperpage dec(15,0)

declare @pagesperMB dec(15,0)

declare @objname nvarchar(776) -- The object we want size on.

declare @updateusage varchar(5) -- Param. for specifying that

create table #temp1

(

表名 varchar(200) null,

行數 char(11) null,

保留空間 varchar(15) null,

資料使用空間 varchar(15) null,

使用空間 varchar(15) null,

未用空間 varchar(15) null

)

--select @objname='N_dep' -- usage info. should be updated.

select @updateusage='false'

/*Create temp tables before any DML to ensure dynamic

** We need to create a temp table to do the calculation.

** reserved: sum(reserved) where indid in (0, 1, 255)

** data: sum(dpages) where indid < 2 + sum(used) where indid = 255 (text)

** indexp: sum(used) where indid in (0, 1, 255) - data

** unused: sum(reserved) - sum(used) where indid in (0, 1, 255)

*/

declare cur_table cursor for

select name from sysobjects where type='u'

Open cur_table

fetch next from cur_table into @objname

While @@FETCH_STATUS=0

begin

create table #spt_space

(

rows int null,

reserved dec(15) null,

data dec(15) null,

indexp dec(15) null,

unused dec(15) null

)

/*

** Check to see if user wants usages updated.

*/

if @updateusage is not null

begin

select @updateusage=lower(@updateusage)

if @updateusage not in ('true','false')

begin

raiserror(15143,-1,-1,@updateusage)

return(1)

end

/*

** Check to see that the objname is local.

*/

if @objname IS NOT NULL

begin

select @dbname = parsename(@objname, 3)

if @dbname is not null and @dbname <> db_name()

begin

raiserror(15250,-1,-1)

return (1)

end

if @dbname is null

select @dbname = db_name()

/*

** Try to find the object.

*/

select @id = null

select @id = id, @type = xtype

from sysobjects

where id = object_id(@objname)

/*

** Does the object exist?

*/

if @id is null

begin

raiserror(15009,-1,-1,@objname,@dbname)

return (1)

end

if not exists (select * from sysindexes

where @id = id and indid < 2)

if @type in ('P ','D ','R ','TR','C ','RF') --data stored in sysprocedures

begin

raiserror(15234,-1,-1)

return (1)

end

else if @type = 'V ' -- View => no physical data storage.

begin

raiserror(15235,-1,-1)

return (1)

end

else if @type in ('PK','UQ') -- no physical data storage. --?!?! too many similar messages

begin

raiserror(15064,-1,-1)

return (1)

end

else if @type = 'F ' -- FK => no physical data storage.

begin

raiserror(15275,-1,-1)

return (1)

end

/*

** Update usages if user specified to do so.

*/

if @updateusage = 'true'

begin

if @objname is null

dbcc updateusage(0) with no_infomsgs

else

dbcc updateusage(0,@objname) with no_infomsgs

print ' '

end

set nocount on

/*

** If @id is null, then we want summary data.

*/

/* Space used calculated in the following way

** @dbsize = Pages used

** @bytesperpage = d.low (where d = master.dbo.spt_values) is

** the # of bytes per page when d.type = 'E' and

** d.number = 1.

** Size = @dbsize * d.low / (1048576 (OR 1 MB))

*/

if @id is null

begin

select @dbsize = sum(convert(dec(15),size))

from dbo.syiles

where (status & 64 = 0)

select @logsize = sum(convert(dec(15),size))

from dbo.sysfiles

where (status & 64 <> 0)

select @bytesperpage = low

from master.dbo.spt_values

where number = 1

and type = 'E'

select @pagesperMB = 1048576 / @bytesperpage

select database_name = db_name(),

database_size =

ltrim(str((@dbsize + @logsize) / @pagesperMB,15,2) + ' MB'),

'unallocated space' =

ltrim(str((@dbsize -

(select sum(convert(dec(15),reserved))

from sysindexes

where indid in (0, 1, 255)

)) / @pagesperMB,15,2)+ ' MB')

print ' '

/*

** Now calculate the summary data.

** reserved: sum(reserved) where indid in (0, 1, 255)

*/

insert into #spt_space (reserved)

select sum(convert(dec(15),reserved))

from sysindexes

where indid in (0, 1, 255)

/*

** data: sum(dpages) where indid < 2

** + sum(used) where indid = 255 (text)

*/

select @pages = sum(convert(dec(15),dpages))

from sysindexes

where indid < 2

select @pages = @pages + isnull(sum(convert(dec(15),used)), 0)

from sysindexes

where indid = 255

update #spt_space

set data = @pages

/* index: sum(used) where indid in (0, 1, 255) - data */

update #spt_space

set inde= (select sum(convert(dec(15),used))

from sysindexes

where indid in (0, 1, 255))

- data

/* unused: sum(reserved) - sum(used) where indid in (0, 1, 255) */

update #spt_space

set unused = reserved

- (select sum(convert(dec(15),used))

from sysindexes

where indid in (0, 1, 255))

select reserved = ltrim(str(reserved * d.low / 1024.,15,0) +

' ' + 'KB'),

data = ltrim(str(data * d.low / 1024.,15,0) +

' ' + 'KB'),

index_size = ltrim(str(indexp * d.low / 1024.,15,0) +

' ' + 'KB'),

unused = ltrim(str(unused * d.low / 1024.,15,0) +

' ' + 'KB')

from #spt_space, master.dbo.spt_values d

where d.number = 1

and d.type = 'E'

end

/*

** We want a particular object.

*/

else

begin

/*

** Now calculate the summary data.

** reserved: sum(reserved) where indid in (0, 1, 255)

*/

insert into #spt_space (reserved)

select sum(reserved)

from sysindexes

where indid in (0, 1, 255)

and id = @id

/*

** data: sum(dpages) where indid < 2

** + sum(used) where indid = 255 (text)

*/

select @pages = sum(dpages)

from sysindexes

where indid < 2

and id = @id

select @pages = @pages + isnull(sum(used), 0)

from sysindexes

where indid = 255

and id = @id

update #spt_space

set data = @pages

/* index: sum(used) where indid in (0, 1, 255) - data */

update #spt_space

set indexp = (select sum(used)

from sysindexes

where indid in (0, 1, 255)

and id = @id)

- data

/* unused: sum(reserved) - sum(used) where indid in (0, 1, 255) */

update #spt_space

set unused = reserved

- (select sum(used)

from sysindexes

where indid in (0, 1, 255)

and id = @id)

update #spt_space

set rows = i.rows

from sysindexes i

where i.indid < 2

and i.id = @id

insert into #temp1

select name = object_name(@id),

rows = convert(char(11), rows),

reserved = ltrim(str(reserved * d.low / 1024.,15,0) +

' ' + 'KB'),

data = ltrim(str(data * d.low / 1024.,15,0) +

' ' + 'KB'),

index_size = ltrim(str(indexp * d.low / 1024.,15,0) +

' ' + 'KB'),

unused = ltrim(str(unused * d.low / 1024.,15,0) +

' ' + 'KB')

from #spt_space, master.dbo.spt_values d

where d.number = 1

and d.type = 'E'

Drop table #spt_space

end

fetch next from cur_table into @objname

end

Close cur_table

DEALLOCATE cur_table

Select * from #temp1 order by len(保留空間) desc,保留空間 desc

Drop table #temp1

return (0)

end

原理很簡單，相信大家都能看懂，sp_spaceused幾乎原封不動地保留下來，也很簡單，直接即可，沒有任何引數，儲存過程執行後，將把當前連線的資料庫中所有資料表按照從大到小排列出來，還有其他的相關資訊。如果能對大家有所參考價值，就請大家能給forgot2000一點掌聲鼓勵吧，謝謝！

本儲存過程在SQLServer7.0/2000下透過。

實用的儲存過程之一 (轉)

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