大数据量表如何统计行数1000万行数据以上
create procedure sp_spaceused --- 1996/08/20 17:01 @objname nvarchar(776) = null, -- The object we want size on. @updateusage varchar(5) = fa
create procedure sp_spaceused --- 1996/08/20 17:01
@objname nvarchar(776) = null, -- The object we want size on.
@updateusage varchar(5) = false -- Param. for specifying that
-- usage info. should be updated.
as
declare @id int -- The object id of @objname.
declare @type character(2) -- The object type.
declare @pages int -- Working variable for size calc.
declare @dbname sysname
declare @dbsize dec(15,0)
declare @logsize dec(15)
declare @bytesperpage dec(15,0)
declare @pagesperMB dec(15,0)
/*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)
*/
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
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
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.sysfiles
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 indexp = (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
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'
end
return (0) -- sp_spaceused
GO
本文作者:金色海洋 来源:http://www.cnblogs.com/winnerzone/archive/2007/06/
CIO之家 www.ciozj.com 微信公众号:imciow
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