Please start any new threads on our new site at http://forums.sqlteam.com. We've got lots of great SQL Server experts to answer whatever question you can come up with.

Our new SQL Server Forums are live! Come on over! We've restricted the ability to create new threads on these forums.

SQL Server Forums
Profile | Active Topics | Members | Search | Forum FAQ
 
Register Now and get your question answered!
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 General SQL Server Forums
 New to SQL Server Programming
 ERROR: Invalid length parameter passed to the LEFT
 Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

JR83
Starting Member

South Africa
31 Posts

Posted - 05/21/2013 :  07:12:54  Show Profile  Reply with Quote
ERROR: Invalid length parameter passed to the LEFT or SUBSTRING function.


WHEN RUNNING MY QUERY - LINE 1.

EG: Select Case When CHARINDEX('Result: ', AMGR_Notes.Textcol) > CHARINDEX('Subject: ',AMGR_Notes.TextCol)

I dont want to pull negative values

visakh16
Very Important crosS Applying yaK Herder

India
52326 Posts

Posted - 05/21/2013 :  07:14:32  Show Profile  Reply with Quote
the issue is you've values without pattern 'Result:' ,'Subject:' etc in strings

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs
Go to Top of Page

JR83
Starting Member

South Africa
31 Posts

Posted - 05/21/2013 :  07:23:32  Show Profile  Reply with Quote
should the values match? im sorry i dont understand
Go to Top of Page

visakh16
Very Important crosS Applying yaK Herder

India
52326 Posts

Posted - 05/21/2013 :  07:29:27  Show Profile  Reply with Quote
The issue is you've an expression involving CHARINDEX() logic somewhere and for values not having the serach patterns it returns 0 as value causing overall expression to give a negative result

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs
Go to Top of Page

bandi
Flowing Fount of Yak Knowledge

India
2242 Posts

Posted - 05/21/2013 :  07:39:11  Show Profile  Reply with Quote
-- see this illustration
DECLARE @Product TABLE(product_id INT, product_name VARCHAR(30))
INSERT INTO @Product
SELECT 1, 'barrings' union all
SELECT 2, 'wheel rim' union all
SELECT 3, 'Test LEFT() Subject: rim' union all
SELECT 4, 'rodd'

SELECT LEFT(product_name, CHARINDEX('Subject: ',product_name)-1 )
--,SUBSTRING(product_name, 1, CHARINDEX('Subject: ',product_name)-1)
FROM @Product
--WHERE CHARINDEX('Subject: ',product_name) >0

You will get error because of CHARINDEX('Subject: ',product_name)-1 becomes -ve value

Now run above code with WHERE condition.... See the result


--
Chandu
Go to Top of Page

visakh16
Very Important crosS Applying yaK Herder

India
52326 Posts

Posted - 05/21/2013 :  07:42:02  Show Profile  Reply with Quote
and one way to avoid this error is to do a small hack like below so that it always works

SELECT LEFT(product_name, CHARINDEX('Subject: ',product_name + 'Subject: ')-1 )
--,SUBSTRING(product_name, 1, CHARINDEX('Subject: ',product_name + 'Subject: ')-1)
FROM @Product




------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs
Go to Top of Page
  Previous Topic Topic Next Topic  
 Reply to Topic
 Printer Friendly
Jump To:
SQL Server Forums © 2000-2009 SQLTeam Publishing, LLC Go To Top Of Page
This page was generated in 0.06 seconds. Powered By: Snitz Forums 2000