Comments on: SQL SERVER – Reclaim Space After Dropping Variable-Length Columns Using DBCC CLEANTABLE

By: SQL SERVER – Weekly Series – Memory Lane – #011 « SQL Server Journey with SQL Authority

Sat, 12 Jan 2013 01:30:54 +0000

[...] Reclaim Space After Dropping Variable-Length Columns Using DBCC CLEANTABLE [...]

By: annad

annad — Thu, 19 Jul 2012 07:10:35 +0000

when i am execting DBCC CLEANTABLE(‘catar’,'temp_val_dia_fin’,0)..
system show below error message …
“Msg 211, Level 23, State 51, Line 1
Possible schema corruption. Run DBCC CHECKCATALOG.”

I am not able to drop the above table

By: Tam

Tam — Wed, 07 Mar 2012 19:51:33 +0000

I performed LTRIM & RTRIM, and reduce the column size (all varchar) to be the column specific max length. The origina table had much larger column size (varchar as well).

Problem: data space has doubled when adjusting the column size compared to the original table (which had far larger column size).

I use DBCC CleanTable, and recover only 2MB. No indexes or keys on both tables. Original table @ 87MB, newly reduce table @ 178.76MB.

What am I doing wrong?

Original table:

CREATE TABLE [dbo].[Original](
[RequestId] [int] NOT NULL,
[QuoteNumber] [varchar](25) NULL,
[ResponseTime] [datetime] NOT NULL,
[ResidenceShape] [varchar](80) NULL,
[ExteriorFeatures_ExteriorDoors] [varchar](300) NULL,
[ExteriorFeatures_SpecialtyWindows] [varchar](300) NULL,
[DetachedStructure1] [varchar](70) NULL,
[AttachedStructure1] [varchar](150) NULL,
[AttachedStructure2] [varchar](150) NULL,
[AttachedStructure3] [varchar](150) NULL,
[GarageType1] [varchar](100) NULL,
[GarageType2] [varchar](100) NULL,
[BathroomFull] [varchar](75) NULL,
[BathroomHalf] [varchar](10) NULL,
[BathroomOneAndHalf] [varchar](10) NULL,
[InteriorFeatures_FirePlace] [varchar](200) NULL,
[InteriorFeatures_Lighting] [varchar](200) NULL,
[InteriorFeatures_Staircase] [int] NULL,
[InteriorFeatures_InteriorDoorsMillwork] [varchar](200) NULL,
[InteriorSystems_HeatingSystem] [varchar](200) NULL,
[InteriorSystems_CoolingSystem] [varchar](200) NULL,
[KitchenSize] [varchar](70) NULL,
[KitchenCounter] [varchar](70) NULL,
[KitchenCabinets_GlassCabinetDoors] [varchar](50) NULL,
[KitchenCabinets_PeninsulaBar] [varchar](50) NULL

New table:

CREATE TABLE [dbo].[New Table](
[RequestId] [int] NOT NULL,
[QuoteNumber] [varchar](14) NULL,
[ResponseTime] [datetime] NOT NULL,
[ResidenceShape] [varchar](25) NULL,
[ExteriorFeatures_ExteriorDoors] [varchar](75) NULL,
[ExteriorFeatures_SpecialtyWindows] [varchar](62) NULL,
[DetachedStructure1] [varchar](38) NULL,
[AttachedStructure1] [varchar](23) NULL,
[AttachedStructure2] [varchar](23) NULL,
[AttachedStructure3] [varchar](23) NULL,
[GarageType1] [varchar](50) NULL,
[GarageType2] [varchar](50) NULL,
[BathroomFull] [varchar](2) NULL,
[BathroomHalf] [varchar](1) NULL,
[BathroomOneAndHalf] [varchar](1) NULL,
[InteriorFeatures_FirePlace] [varchar](35) NULL,
[InteriorFeatures_Lighting] [varchar](97) NULL,
[InteriorFeatures_Staircase] [int] NULL,
[InteriorFeatures_InteriorDoorsMillwork] [varchar](99) NULL,
[InteriorSystems_HeatingSystem] [varchar](31) NULL,
[InteriorSystems_CoolingSystem] [varchar](28) NULL,
[KitchenSize] [varchar](23) NULL,
[KitchenCounter] [varchar](29) NULL,
[KitchenCabinets_GlassCabinetDoors] [varchar](2) NULL,
[KitchenCabinets_PeninsulaBar] [varchar](3) NULL

By: SQL SERVER – Reclaiming Space Back from Database – Quiz – Puzzle – 28 of 31 « SQL Server Journey with SQL Authority

Sun, 29 Jan 2012 01:31:24 +0000

[...] in the SQL Server Shrinking Database is Bad – Increases Fragmentation – Reduces Performance Reclaim Space After Dropping Variable-Length Columns Using DBCC CLEANTABLE Data and Page Compressions – Data Storage and IO [...]

By: Peter Singh

Peter Singh — Fri, 15 Jul 2011 13:29:11 +0000

Thanks Pinal, and thanks Suprotim for clarifying what the ’0′ is.

By: Suprotim

Suprotim — Fri, 22 Feb 2008 11:50:55 +0000

The 3rd parameter is for batch size. It determines the no. of steps to reclaim space. If given as 0, it reclaims steps in a single transaction

HTH,
Suprotim Agarwal
—–

By: Dugi

Dugi — Thu, 17 Jan 2008 12:38:19 +0000

AdventureWorks = DB
Person.Contact = Schema.Table
0 = ????????????????????

By: Dugi

Dugi — Thu, 17 Jan 2008 12:34:29 +0000

can you explain why value 0 at the end of the statement

( ‘AdevntureWorks’ , ‘Person.Contact’, 0)
DB Table ?