Solved

Check if cursor exists

Posted on 2006-11-13
6
551 Views
Last Modified: 2012-08-14
I have a procedure that has, in part, the following code:

DECLARE CertCursor CURSOR FOR SELECT t.CertDesc FROM EmployeeRecords.dbo.tblNew_Hire_Initial_Training t  ...

Is there syntax I can use afterwards to insure I have data in the cursor before trying to open it and fetch the first row?
0
Comment
Question by:dbbishop
  • 3
  • 3
6 Comments
 
LVL 29

Expert Comment

by:Nightman
ID: 17933432
No - you have to use  @@FETCHSTATUS

e.g. OPEN CertCursor
FETCH next from CertCursor into @CertDesc
WHILE @@FETCH_STATUS = 0

Alternatively, you can select count into a local variable first, and then check the value of @Count

E.G.
declare @Count int
SELECT @Count=COUNT(*) FROM EmployeeRecords.dbo.tblNew_Hire_Initial_Training t  ...

IF @Count>0
BEGIN
DECLARE CertCursor CURSOR FOR SELECT t.CertDesc FROM EmployeeRecords.dbo.tblNew_Hire_Initial_Training t  ...
 etc..
END
0
 
LVL 16

Accepted Solution

by:
Hillwaaa earned 250 total points
ID: 17933887
Hi dbbishop,

There is a function that does this (see CURSOR_STATUS: http://msdn2.microsoft.com/en-us/library/ms177609.aspx), however it will only indicate if there is data for cursors that have been declared as variables - see the example at the bottom of the page.

Cheers!
0
 
LVL 29

Expert Comment

by:Nightman
ID: 17933925
Doesn't solve the problem - you still have to open the cursor before you can check the status.
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
LVL 16

Expert Comment

by:Hillwaaa
ID: 17934029
Nightman - true - you are right on that point (as always :)

ddbishop - there really doesn't appear to be a way to determine how many rows are in a cursor until it is opened.  CURSOR_STATUS, @@CURSOR_ROWS (which would also work) and @@FETCHSTATUS all require an open cursor.  

Therefore you should probably refund those points to Nightman - he answered your question more correctly!
0
 
LVL 29

Expert Comment

by:Nightman
ID: 17934064
Hillwaa - please let my wife know that I'm usually right. I have been trying to convince her for 14 years now, and making no progress whatsoever ;o)

ddbishop - you can post a request in http://www.experts-exchange.com/Community_Support/ to have this re-opened so you can re-assign the points.

Cheers
Night
0
 
LVL 16

Expert Comment

by:Hillwaaa
ID: 17934078
Nightman - lol - just print off this thread - then you have it in writing :)
0

Featured Post

Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Database Integrity 1 48
SQL Log size 3 17
MS SQL Delete Duplicate Rows Only 2 15
.NET Enums [Flags] & Bitwise Design Question 6 19
Introduction In my previous article (http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/SSIS/A_9150-Loading-XML-Using-SSIS.html) I showed you how the XML Source component can be used to load XML files into a SQL Server database, us…
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
Familiarize people with the process of utilizing SQL Server functions from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Ac…
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question