Returning varchar(8000) only allowing a return of 4000 characters

Can someone explain why the following proc is only returning 4000 characters?  QA is set to 8192, btw.  If I run a len on the retval it returns 4000 characters when there are about 5000 worth of the columns I am returning.

declare @retval varchar(8000)
   select @retval = coalesce(@retval + ',', '') + '[' + column_name + ']' from information_schema.columns where table_name = @table_name and column_name not in (@skipcols) order by column_name
   select @retval
crudmopAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Guy Hengel [angelIII / a3]Billing EngineerCommented:
column names are nvarchar, where the max is 4000 indeed.

declare @retval varchar(8000)
   select @retval = coalesce(@retval + ',', '') + '[' + cast(column_name as varchar(200)) + ']' from information_schema.columns where table_name = @table_name and column_name not in (@skipcols) order by column_name
   select @retval

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
crudmopAuthor Commented:
doh doh doh.

Ya know I stared at this wondering what the hell was up.  You win the "let me make fun of you by pointing out the obvious" award.

Thanks much :)
0
Guy Hengel [angelIII / a3]Billing EngineerCommented:
<Author Comments>
doh doh doh.

Ya know I stared at this wondering what the hell was up. You win the "let me make fun of you by pointing out the obvious" award.
</Author Comments>

sorry, but that is not obvious "per se", as it's the typical case of implicit data type conversion, which are difficult to "see". as from some months/years of experience you remember things like those, and first search in that directly.

glad I could help to "un"-doe this :)

Cheers
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server

From novice to tech pro — start learning today.