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RTRIM LTRIM for TEXT datatype

Posted on 2008-10-03
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Last Modified: 2012-08-14
Hi Experts,

I am using a VARCHAR(MAX) parameter in one of the stored procedures. Recently i discovered it might get bigger than 8000 characters. So i changed that parameter to TEXT. But problem is i cannot use RTRIM, LTRIM functions on TEXT datatype. Is there any work around for this problem?

Thanks
Raju
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Question by:srivatsavaye
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Expert Comment

by:BrandonGalderisi
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varchar(max) supports text up to 2GB.  No need to use text.
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Author Comment

by:srivatsavaye
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Yep!! VARCHAR supports text up to 2GB but my character string length is more than 8000. VARCHAR truncates anything more than 8000 characters
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Expert Comment

by:BrandonGalderisi
Comment Utility
not varchar(max).
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by:BrandonGalderisi
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varchar(max) should be used everywhere that text used to be used.  See the excerpt below from BOL.


ntext, text, and image data types will be removed in a future version of Microsoft SQL Server. Avoid using these data types in new development work, and plan to modify applications that currently use them. Use nvarchar(max), varchar(max), and varbinary(max) instead. For more information, see Using Large-Value Data Types.
http://msdn.microsoft.com/en-us/library/ms187993(SQL.90).aspx
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by:srivatsavaye
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But my parameters length is more than 8000. how would i use varchar?
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by:BrandonGalderisi
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declare your parameter as data type varchar(max)

ex.

Create procedure up_Proc1
  @Param varchar(max)
as
select @Param
go


@Param will accept up to 2GB of data, not 8000 characters.
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by:srivatsavaye
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That is exactly the way i declared my parameter.

you are saying that even if the string length is more than 8000, it will show everything if the size is below 2GB? It is not happening.

Here is little bit more detail of my problem:

I have this report (SSRS) which has a parameter called Resources. i pass in this parameter to a stored procedure. Parameter is just bunch of comma separated Id's. When i print this parameter using TEXT(storage space is 2GB for this too) datatype, length of the parameter is 8792 and if i print it using VARCHAR(MAX), length is 8000. So it is clearly truncating the parameter to 8000 characters unless i am missing something.

Thanks
Raju
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by:BrandonGalderisi
Comment Utility
So when you execute in grid view or text view?

Tools > Options
Query Results > SQL Server > Results to #### (text/grid)

Text will only display the first 8192 characters to screen.  that is a limitation of the query tool.  But the procedure will output all of the data when running.
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by:srivatsavaye
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I am not displaying it in SSMS. i am doing it on my report
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Expert Comment

by:BrandonGalderisi
Comment Utility
What data type is your field in your table that you are returning?
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by:srivatsavaye
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It is not a datatype or anything. i just tried this for testing purposes

create proc sp_proc
@resources VARCHAR(MAX) (TEXT)

AS

select @Resources as Res

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Expert Comment

by:BrandonGalderisi
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Not sure what you're trying to do there:


create proc sp_proc
@resources VARCHAR(MAX)

AS

select @Resources as Res
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by:srivatsavaye
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i was just trying to prove that VARCHAR truncates the string after 8000 characters. try it for your self if you want.
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by:BrandonGalderisi
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No... what are you doing trying to put (text) after varchar(max)?


varchar(MAX) does not truncate.  If you declare a parameter as varchar(8000)


Try this:



declare @a varchar(max)
set @a=replicatE('a',8000)
set @a=@a+@a
select len(@a)


replicate won't product a string longer than 8000, but that's not a limitation of the data type, it's a limitation of the replicate function.
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by:srivatsavaye
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The example you gave doesn't prove that VARCHAR(MAX) doesn't truncate after 8000 characters. can you give me an example where varchar(max) accommodates more than 8000 characters?

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BrandonGalderisi earned 500 total points
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Are you serious?  @a has a length of 16000 if you run that.
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Author Closing Comment

by:srivatsavaye
Comment Utility
Sorry abut that!!! it is 16000. thanks for your help
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