Problem Declaring Cursors

Feb 26, 2008

I am still having problems with my cursors. I am receiving the following errors when I execute my Stored Procedure:
Msg 16915, Level 16, State 1, Procedure BatchNonMons2, Line 27
A cursor with the name 'MyCursor' already exists.
Msg 16905, Level 16, State 1, Procedure BatchNonMons2, Line 31
The cursor is already open.
Msg 16915, Level 16, State 1, Procedure BatchNonMons2, Line 37
A cursor with the name 'vwCursor' already exists.
Msg 16905, Level 16, State 1, Procedure BatchNonMons2, Line 38
The cursor is already open.

Here is the code causing the problem:

CREATE PROCEDURE [dbo].[BatchNonMons2] AS

BEGIN
/* Create a new hdr each time the Sys/Prin changes in the Dtl rec */

/* Define every field you want to output */
DECLARE @Batch_Type int
DECLARE @Batch_Num int
DECLARE @Sys varchar (4)
DECLARE @Prin varchar (4)
DECLARE @Account_Num varchar(16)
DECLARE @Tran_Code varchar(3)
DECLARE @Clerk_Code varchar(3)
DECLARE @Memo_Text varchar(57)
DECLARE @SubTrans varchar(2)
DECLARE @SubTrans_2 varchar(1)
DECLARE @Terminal_Id varchar(3)
DECLARE @Op_Code varchar(2)
DECLARE @Last4 varchar(6)

DECLARE @vwSys varchar (4)
DECLARE @vwPrin varchar (4)

/* Define Cursor */
DECLARE MyCursor cursor
For SELECT Batch_Type, Batch_Number, Sys, Prin, Account_Number, Transaction_Code,
Clerk_Code, Memo_Text, SubTrans, SubTrans2, Term_id, Op_Code
FROM dbo.tblNonMon_Daily_Trans

Open MyCursor; /*Works like an ARRAY*//*holds current record */
FETCH NEXT FROM MyCursor INTO @Batch_Type, @Batch_Num, @Sys, @Prin, @Account_Num,
@Tran_Code, @Clerk_Code, @Memo_Text, @SubTrans, @SubTrans_2,
@Terminal_Id, @Op_Code

Declare vwCursor cursor
FOR SELECT Sys, Prin FROM dbo.vwNonMonSysPrins
open vwCursor;
FETCH next FROM vwcursor INTO @vwSys, @vwPrin

/* When @@Fetch_Status = 1 EOF has been reached */
WHILE @@Fetch_Status = 0
BEGIN
WHILE @vwSys = @Sys
BEGIN

Any input would be appreciated.
Thanx,

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Problem Declaring Cursors

May 2, 2008



I am entering the following:


declare @iAbsenceCategoryID int;

declare @dEntitlementRenewal datetime;

declare @iAbsenceUserID int;

declare @iMinutesUsed int;

declare @iMinutesNotUsed int;

declare @iEntitlement int;



declare cr cursor forward_only

for

select iabsencecategoryid,

dentitlementrenewal

from TblTAAbsenceCategories

open cr;

fetch next from cr into

@iAbsenceCategoryID, @dEntitlementRenewal

WHILE @@FETCH_STATUS = 0

BEGIN

fetch next from cr into

@iAbsenceCategoryID, @dEntitlementRenewal

if (DATEPART("Month",(GETDATE()))) = (DATEPART("Month", (@dEntitlementRenewal))) and (DATEPART("Day",(GETDATE()))) = (DATEPART("Day",(GETDATE())))

declare usercr cursor FORWARD_ONLY for

select iAbsenceUserID from TblTAAbsenceUsers

where iAbsenceCategoryID = @iAbsenceCategoryID

fetch next from usercr into

@iAbsenceUserID

WHILE @@FETCH_STATUS = 0

BEGIN

fetch next from usercr into

@iAbsenceUserID

select @iMinutesUsed = sum(iMinutesRequested)

from tblTAAbsenceHolidays

where iAbsenceUserID = 13 and iAbsenceActionID != 2

select @iEntitlement = iHolidayEntitlement from TblTAAbsenceUsers where iAbsenceUserID = 13;

set @iMinutesNotUsed = (@iEntitlement) - (@iMinutesUsed);

update TblTAAbsenceUsers

set iMinutesNotUsed = @iMinutesNotUsed

where iAbsenceUserID = @iAbsenceUserID;

END;

END;

close usercr;

close cr;

DEALLOCATE usercr;

DEALLOCATE cr;


and i get the following error message:


Msg 16916, Level 16, State 1, Line 26

A cursor with the name 'usercr' does not exist.

Msg 16916, Level 16, State 1, Line 57

A cursor with the name 'usercr' does not exist.

Msg 16916, Level 16, State 1, Line 60

A cursor with the name 'usercr' does not exist.


I cant see why its not allowing me to declare the usercr cursor, can anyone tell me where im going wrong? thanks!



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Insert <AWMI:material>aluminum sheet MS-2341</AWMI:material> into the <AWMI:tool>T-85A framing tool</AWMI:tool>.
</AWMI:step>
<AWMI:step xmlns:AWMI="http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelManuInstructions">

[code]....

But, I don't know what AWMI means and what the results of SELECT Instructions.query(' declare namespace...  are. 

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Using Cursors

Jul 16, 2006

Hello,
Can anyone direct me a good article that is about why we should try avoiding using cursors and what are the alternatives?

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Using Cursors From Asp.net

Feb 16, 2008

can we call cursors from asp.net as we can call stored procedures from asp.net.
 

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Cursors

Jan 7, 2005

Hi,

I'm writting a stored procedure to insert new rows into a table, but I need to loop through an exsiting table and create a new record for every row in the old table. So I think what I'm needing to use is a cursor, but I've never worked with cursors before, and I just want to check that I have the right idea on what they are used for and if what I have so far looks ok.

This what I have so far, the StoreFees table only has 5 rows:


DECLARE @StoreFee as smallmoney
DECLARE @StoreLineID as int

DECLARE MyStoreFees CURSOR
FORWARD_ONLY
FOR
SELECT LineId, StoreFee FROM StoreFees ORDER BY StoreFee

OPEN MyStoreFees

FETCH NEXT FROM MyStoreFees
INTO @StoreLineId, @StoreFee

--Do my Inserts into other tables
INSERT INTO OtherTable (...,...,.., @StoreFee)
...
...
-- Done working with that row

CLOSE MyStoreFees

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Cursors

Feb 28, 2005

I am trying to pull the data via fetching rows into a variable.

Begin
Fetch Next Into @temp...
Select @MainVariable = @MainVariable + @temp < @temp doesn't refresh with next fetch)

Print @temp < this works fine and returns the value for each fetch

End


I can print @temp and the data returns fine, but when I try to cancantenate with the above select, it doesn't refresh @temp wit the column in the table.

Any ideas?

DotNetNow

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Cursors

Jun 19, 2001

I have two procedures. One works well, and the other has a small glitch I cannot figure out. I have placed >>>> at the place where the problem is occuring.

The first procedure, which is working great, is applying a stored procedure to many servers (remote procedure call), but is also polling the local server via a linked server connection. This way, all servers are polled equally.

The second procedure is actually using a SELECT statment to query a system table. This procedure works well on all servers except the local one. I get this error message:
Server: Msg 3910, Level 16, State 1, Line 1
Transaction context in use by another session.
[OLE/DB provider returned message: Unspecified error]

There seems to be a connection issue. Can someone help me work around this?

Thank you,

Neal


FIRST PROCEDURE (this one works perfectly):
truncate table dbidname
CREATE TABLE ##dbtemp ( dbname VarChar(50),
dbsize varchar (25),
dbownervarchar(50),
dbid smallint,
createdate datetime,
statusvarchar(75) )
declare@servernamevarchar(50)
declare dbupdate cursor
global
for
select servername from sqlservers where status = 'a'
open dbupdate
fetch next from dbupdate into @servername
while @@fetch_status = 0
begin
print @servername
EXEC sp_addlinkedserver @servername, 'SQL Server'
>>>INSERT INTO ##dbtemp
>>>exec (@servername + '.master..sp_helpdb')
alter table dbidname alter column sqlservers_id int null
insert into dbidname (dbsystemid, dbname)
select dbid, dbname from ##dbtemp
update dbidname set sqlservers_id = sqlservers.sqlservers_id from sqlservers where @servername = sqlservers.servername and
dbidname.sqlservers_id is null
update dbidname set whenupdate = getdate()
alter table dbidname alter column sqlservers_id int not null
exec sp_dropserver @servername
delete ##dbtemp
fetch next from dbupdate into @servername
end
close dbupdate
deallocate dbupdate
drop table ##dbtemp
exec spal_db_files_update


SECOND PROCEDURE (see >>>> to note problem area):
truncate table dbidname
CREATE TABLE ##dbtemp ( dbname VarChar(50),
dbsize varchar (25),
dbownervarchar(50),
dbid smallint,
createdate datetime,
statusvarchar(75) )
declare@servernamevarchar(50)
declare dbupdate cursor
global
for
select servername from sqlservers where status = 'a'
open dbupdate
fetch next from dbupdate into @servername
while @@fetch_status = 0
begin
print @servername
EXEC sp_addlinkedserver @servername, 'SQL Server'
>>>>INSERT INTO ##dbtemp
>>>>exec (@servername + '.master..sp_helpdb')
alter table dbidname alter column sqlservers_id int null
insert into dbidname (dbsystemid, dbname)
select dbid, dbname from ##dbtemp
update dbidname set sqlservers_id = sqlservers.sqlservers_id from sqlservers where @servername = sqlservers.servername and
dbidname.sqlservers_id is null
update dbidname set whenupdate = getdate()
alter table dbidname alter column sqlservers_id int not null
exec sp_dropserver @servername
delete ##dbtemp
fetch next from dbupdate into @servername
end
close dbupdate
deallocate dbupdate
drop table ##dbtemp

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Cursors

Nov 28, 2000

I am receiving this error when running my cursor:

Error Messages...
Server: Msg 16933, Level 16, State 1, Line 0
The cursor does not include the table being modified.
The statement has been terminated.
Server: Msg 16933, Level 16, State 1, Line 5 (this message repeats)...
The cursor does not include the table being modified.
The statement has been terminated.

query:

declare cursor_test CURSOR for
select emp_ssn, effective_date1 from temp_employee_benefit_load
open cursor_test
declare @ssn char(9), @process_date char(8)
fetch next from cursor_test into @ssn, @process_date
while (@@fetch_status=0)
update test_cursor
set ssn = @ssn, process_date = @process_date
where current of cursor_test
fetch next from cursor_test into @ssn, @process_date

close cursor_test
deallocate cursor_test


Any help is appreciated:

Thanks,

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Cursors?????????

Sep 7, 2000

I have stored procedure in that I am using a cursor to fetch the row by row.
cursor is fetching 75000 records so that the procedure is taking long time.
Is there any way to replace the cursor to fetch the records row by row.

He needed.

Ranch

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Cursors

Apr 14, 2000

Please help resolve a problem (and debate!).

We have an app using VB with Access as the front end to SQL. SQL statments were built and sent
directly to the server obtaining set-oriented results. Response was fair.

We have a new app developed by an "expert" using VB & Interdev that was to be ported for use on
the internet. The app was designed using the same logic to build the SQL statements, but it is also
using cursors to retrieve all data. RESPONSE IS TERRIBLE!
The designer says that to access SQL over the Web, cursor use is a MUST!
True? Not True?
If true, and I am stuck with an app using cursors, any basic suggestions on where to look to improve
response time?

Thanks for any input.
FJ

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How To Use Cursors

Apr 23, 1999

Hi,

I am using SQL Server 6.5 and I have a VB routine that updates a field in a tble so it can be used in a primary key. This is run after input of data using bcp. I have noticed on several posts re: using cursors to move through a recordset and was wondering if I could use this functionality to replace my VB routine. I checked the archives and found several messages but I am not sure where to start. My VB routine is:

I first would query the data to return all rows where the value of R08SegmentValue= Null. Then I move through the resultset changing the value of the field R08Segments.

***********************Start of VB Code****************
'Set initial value for sTReportHeaderIdx
With rs1
sTReportHeaderIdx = !ReportIdx & !HeaderIdx
sPReportHeaderIdx = sTReportHeaderIdx
End With

bCount = 1

'loop through rs and when streportheaderidx changes reset bCount to 1
'otherwise increment bcount by 1 and write to field R08SegmentValue
Do While rs1.EOF = False And blnContinue = True
DoEvents
Do While sPReportHeaderIdx = sTReportHeaderIdx
With rs1
.Edit
!R08SegmentValue = bCount
.Update
bCount = bCount + 1
sPReportHeaderIdx = sTReportHeaderIdx
.MoveNext
If Not rs1.EOF Then sTReportHeaderIdx = !ReportIdx & !HeaderIdx
End With
Loop
sPReportHeaderIdx = sTReportHeaderIdx
bCount = 1
Loop

In the end my data should look like

ReportIdx HeaderIdx R08SegmentValue
1 1 1
1 1 2
2 1 1
2 1 2
2 1 3
3 1 1
3 1 2
3 1 3
1 2 1
1 2 2
1 2 3
etc..


Can this be done via an sp? How would I go about writing something like this?

Thanks in advance...any assistance you could provide would be appreciated!

Kevin

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