I have a need to access random entries in an IRowset object. Looking through the OLEDB documentation there seems to be several options:
1. Just use GetNextRows with positive or negative offset values..
2. Use the IRowsetLocate :: GetRowsAt method
3. Use IRowsetIndex :: Seek to set the cursor
4. Use IRowsetBookmark :: PositionOnBookmark
Which of these are supported and/or recommended for SSCE?
Just to give you an idea of what I'm going for, the application will look something like the following on my own recordset classes:
I'm trying to create a RecordSet type object in native oledb which only stores 1 row at a time. The main reason for this is that I very well may be selecting thousands of records and I don't want to run into memory issues storing all those rows. Thus I need to use a cursor to move between records in a Rowset. Unfortunately, I'm required to support SQL query processing, so unless there's an easy workaround, I'm limited to the forward-only and scrollable cursors. Both cursors would work from the functionality standpoint, but I have some concerns with both of them:
Forward-Only:
Although the forward-only read-only cursor is the fastest query processor cursor and the second fastest cursor overall, this cursor provides the least amount of functionality. It does not support bookmarks or updates.
This cursor does not allow quick restarts...in fact, it's mentioned in an msdn article that when this cursor is restarted, it may rerun the query. I would have to restart a forward only cursor to allow for MoveToPrev() and MoveToFirst() functionality. Can anyone confirm that the query is rerun on a restartposition call?
MSDN states that this cursor does not support updates, does this mean that if I execute an UPDATE query on a row within the rowset, then move to that row via GetNextRows the data will be old?
If the above is true, that makes me think the cursor is caching the data. MSDN doesn't state this, but wouldn't that be accurate? Scrollable:
"The scrollable read-only cursor is the most functional query processor cursor. The result set of this cursor is cached. This provides fast cursor restarts but makes it more resource intensive, especially for queries with large result sets. Because the results are cached, changes to the underlying base tables for a query are not reflected in the query results unless the query is re-executed."
Is the cache the same as just storing all selected rows in memory? If so, why would I bother using this cursor at all instead of storing the rows in my own data structure? Again if anyone knows a simple way to run SQL queries and still use a base table cursor let me know; otherwise I've got to decide between the slower two.
I got a problem. I am working on DTS package. The last step is updating a table field. I wrote a stored procedure as below:
CREATE PROCEDURE [Update_product_manufacturer] AS
Declare @product_id int Declare @supplier_name VarChar (255)
Declare ValueCursor Cursor For
select product.product_id, [P21_SUPPLIER_id_name_ke].[supplier_name] from [VARIANT],[P21_INV_MAST_uid_itenID_weight_ke],[product], [P21_INVENTORY_SUPPLIER_uid_supplierID_price_cost_k e],[P21_SUPPLIER_id_name_ke] where [product].product_id = [VARIANT].[product_id] and [P21_INV_MAST_uid_itenID_weight_ke].[item_id]=[VARIANT].[SKU] AND [P21_INV_MAST_uid_itenID_weight_ke].[inv_mast_uid]=[P21_INVENTORY_SUPPLIER_uid_supplierID_price_cost_k e].[inv_mast_uid] AND [P21_SUPPLIER_id_name_ke].[supplier_id]=[P21_INVENTORY_SUPPLIER_uid_supplierID_price_cost_k e].[supplier_id] order by [product].[product_id] for read only
Open ValueCursor while (0 = 0) begin fetch next from ValueCursor Into @product_id, @supplier_name
update product set manufacturer = @supplier_name where product_id = @product_id
end
close ValueCursor Deallocate ValueCursor
Notes: Table: Product has 28,000 rows, other tables with 28,000 - 56,000 rows
it's been 2 hours, the job is still working.
Who has this kind of experience? How can I make updating quickly?
I have an SSIS package which takes input from Flat file and transfer the data to SQL Server using OLEDB Destination Data Flow Item. The OLEDB Connection Manager used for the destination is configured to use SQL Server Authentication for the user €˜sa€™. The package works fine without enabling the configurations. But when I enable package configuration and save the configuration of the various connection managers in an XML configuration file and then run the package it gives the following error in the validation phase: [OLE DB Destination [21]] Error: The AcquireConnection method call to the connection manager "<Connection Manager Name>" failed with error code 0xC0202009. And after the validation phase is complete the following error message is given for the package execution: [Connection manager "<Connection Manager Name>"] Error: An OLE DB error has occurred. Error code: 0x80040E4D. An OLE DB record is available. Source: "Microsoft SQL Native Client€? Hresult: 0x80040E4D Description: "Login failed for user 'sa'." Has anyone else run into this? I am running SQL 2005 9.0.1399 and VS 2005 8.0.50727.42 (RTM.50727.4200) on Windows Server 2003 Enterprise Edition SP1. Any suggestions would be welcome. TIA, Robinson
I'm at a bit of a loss as it seems what I want to do should be obvious but I can't seem to locate whether it is possible. Essentially I would like to render a report using the api/C# and I would like to set the actual data the report renders via an XML string that I construct however I like within my code. Is this not possible? I hope I'm overlooking the obvious here.
I used to do this in DTS but wondered how to do it in SSIS. I have a For Each ADO recordset loop that reads these four columns into variables:
DataSource Name, Name(for a WHERE clause), user and password.
For each "Building" there is a new server to connect to, with identical tables. I have 10 tables in the loop to pump from one database to a SQL 2005 database (i.e. 10 dataflows). I want to set the source connection information with the variables. My questions:
1. How do I set the connection information for the source connections? Do I just set the properties for the connection manager and then it sets for all the sources? What property do I set--do I need a script task?
2. How do I use the values from the "Name" column in a WHERE clause in each data flow?
I am trying to set the connection string in a connection manager at runtime. Here is what I have done:
1. Created a gv_DataSource, gv_Username and gv_Password
2. Created a ForEach Loop that reads DataSource, Username and password values from a variable (it is an For Each ADO loop Enumerator). The ADO recordset is read into by an Execute SQL task before the loop.
3. Mapped values from the recordset to variable in the ForEach loop's "Variable Mappings" page.
4. Used the variables in my Sybase OLEDB Connection Manager's "Expression" property, setting the "ConnectionString" property to:
5. I set the values in my database table for the connection-I set 2 connections for which I have Sybase OLEDB datasources setup.
When I run the package, I just get the first server's data twice, it doesn't set the second server's data during the second loop. I made sure the first one was working (i.e. the ConnectionString's property was being set by the data from the current variables) by setting the variables incorrectly in the variable properties page, and then running the package. So the first row of connection information is working, but the second loop around it doesn't seem to be working. I used a msgbox in a script task to show that the variables are mapping correctly in the loop, so it seems the second time around the connection information isn't taking from the variables.
How many result-rows does mssql return should be used asynchronous method to use mssql cursor, can get the best performance in any time in any result offset?
i want to make the cursor fast in any time whatever how many results returned
Hi,I am trying to write a method which needs to call a stored procedure and then needs to get the response of the stored procedure back to the variable i declared in the method. private string GetFromCode(string strWebVersionFromCode, string strWebVersionString) { //call stored procedure } strWebVersionFromCode = GetFromCode(strFromCode, "web_version"); // is the var which will store the response.how should I do this?Please assist.
Hi, I just have a Dataset with my tables and thats it I have a grid view with several datas on it no problem to get the data or insert but as soon as I try to delete or update some records the local machine through the same error Unable to find nongeneric method... I've try to create an Update query into my table adapters but still not working with this one Also, try to remove the original_{0} and got the same error... Please help if anyone has a solution
I got an error when i do an OLE db Source pointing to an sql 2000 database and executing a sql query inside the OLE Source. The ole source will point to an OLE DB destination which is an sql 2005 database.
But i got the below error:
Error at Data Flow Task [OLE DB Destination [245]]: the column firstname cannot be processed because more than one code page (936 and 1252) are specified for it.
Error at Data Flow Task [DTS.Pipeline]: "component "OLE DB destination" (245)" failed validation and returned validation status "VS_ISBROKEN".
Error at Data Flow Task [DTS.Pipeline]: One or more component failed validation.
Error at Data Flow TaSK: There were errors during task validation.
STATIC Defines a cursor that makes a temporary copy of the data to be used by the cursor. All requests to the cursor are answered from this temporary table in tempdb; therefore, modifications made to base tables are not reflected in the data returned by fetches made to this cursor, and this cursor does not allow modifications
It say's that modifications is not allowed in the static cursor. I have a questions regarding that
Static Cursor declare ll cursor global static            for select name, salary from ag  open ll             fetch from ll               while @@FETCH_STATUS=0               fetch from ll                update ag set salary=200 where 1=1    close ll deallocate ll
In "AG" table, "SALARY" was 100 for all the entries. When I run the Cursor, it showed the salary value as "100" correctly.After the cursor was closed, I run the query select * from AG.But the result had updated to salary 200 as given in the cursor. file says modifications is not allowed in the static cursor.But I am able to update the data using static cursor.
Hello,I have a test database with table A containing 10,000 rows and a tableB containing 100,000 rows. Rows in B are "children" of rows in A -each row in A has 10 related rows in B (ie. B has a foreign key to A).Using ODBC I am executing the following loop 10,000 times, expressedbelow in pseudo-code:"select * from A order by a_pk option (fast 1)""fetch from A result set""select * from B where where fk_to_a = 'xxx' order by b_pk option(fast 1)""fetch from B result set" repeated 10 timesIn the above psueod-code 'xxx' is the primary key of the current Arow. NOTE: it is not a mistake that we are repeatedly doing the Aquery and retrieving only the first row.When the queries use fast-forward-only cursors this takes about 2.5minutes. When the queries use dynamic cursors this takes about 1 hour.Does anyone know why the dynamic cursor is killing performance?Because of the SQL Server ODBC driver it is not possible to havenested/multiple fast-forward-only cursors, hence I need to exploreother alternatives.I can only assume that a different query plan is getting constructedfor the dynamic cursor case versus the fast forward only cursor, but Ihave no way of finding out what that query plan is.All help appreciated.Kevin
I'm trying to implement a sp_MSforeachsp howvever when I call sp_MSforeach_worker I get the following error can you please explain this problem to me so I can over come the issue.
Msg 16958, Level 16, State 3, Procedure sp_MSforeach_worker, Line 31
Could not complete cursor operation because the set options have changed since the cursor was declared.
Msg 16958, Level 16, State 3, Procedure sp_MSforeach_worker, Line 32
Could not complete cursor operation because the set options have changed since the cursor was declared.
Msg 16917, Level 16, State 1, Procedure sp_MSforeach_worker, Line 153
Cursor is not open.
here is the stored procedure:
Alter PROCEDURE [dbo].[sp_MSforeachsp]
@command1 nvarchar(2000)
, @replacechar nchar(1) = N'?'
, @command2 nvarchar(2000) = null
, @command3 nvarchar(2000) = null
, @whereand nvarchar(2000) = null
, @precommand nvarchar(2000) = null
, @postcommand nvarchar(2000) = null
AS
/* This procedure belongs in the "master" database so it is acessible to all databases */
/* This proc returns one or more rows for each stored procedure */
/* @precommand and @postcommand may be used to force a single result set via a temp table. */
declare @retval int
if (@precommand is not null) EXECUTE(@precommand)
/* Create the select */
EXECUTE(N'declare hCForEachTable cursor global for
DECLARE DBCur CURSOR FOR SELECT U_OB_DB FROM [@OB_TB04_COMPDATA]
OPEN DBCur FETCH NEXT FROM DBCur INTO @DBNAME
WHILE @@FETCH_STATUS = 0 BEGIN
SELECT @SQLCMD = 'SELECT T0.CARDCODE, T0.U_OB_TID AS TRANSID, T0.DOCNUM AS INV_NO, ' + + 'T0.DOCDATE AS INV_DATE, T0.DOCTOTAL AS INV_AMT, T0.U_OB_DONO AS DONO ' + + 'FROM ' + @DBNAME + '.dbo.OINV T0 WHERE T0.U_OB_TID IS NOT NULL' EXEC(@SQLCMD) PRINT @SQLCMD FETCH NEXT FROM DBCur INTO @DBNAME
END
CLOSE DBCur DEALLOCATE DBCur
Part 2
SELECT T4.U_OB_PCOMP AS PARENTCOMP, T0.CARDCODE, T0.CARDNAME, ISNULL(T0.U_OB_TID,'') AS TRANSID, T0.DOCNUM AS SONO, T0.DOCDATE AS SODATE, SUM(T1.QUANTITY) AS SOQTY, T0.DOCTOTAL - T0.TOTALEXPNS AS SO_AMT, T3.DOCNUM AS DONO, T3.DOCDATE AS DO_DATE, SUM(T2.QUANTITY) AS DOQTY, T3.DOCTOTAL - T3.TOTALEXPNS AS DO_AMT INTO #MAIN FROM ORDR T0 JOIN RDR1 T1 ON T0.DOCENTRY = T1.DOCENTRY LEFT JOIN DLN1 T2 ON T1.DOCENTRY = T2.BASEENTRY AND T1.LINENUM = T2.BASELINE AND T2.BASETYPE = T0.OBJTYPE LEFT JOIN ODLN T3 ON T2.DOCENTRY = T3.DOCENTRY LEFT JOIN OCRD T4 ON T0.CARDCODE = T4.CARDCODE WHERE ISNULL(T0.U_OB_TID,0) <> 0 GROUP BY T4.U_OB_PCOMP, T0.CARDCODE,T0.CARDNAME, T0.U_OB_TID, T0.DOCNUM, T0.DOCDATE, T3.DOCNUM, T3.DOCDATE, T0.DOCTOTAL, T3.DOCTOTAL, T3.TOTALEXPNS, T0.TOTALEXPNS
my question is, how to join the part 1 n part 2? is there posibility?
I'm new to cursors, and I'm not sure what's wrong with this code, it run for ever and when I stop it I get cursor open errors
declare Q cursor for select systudentid from satrans
declare @id int
open Q fetch next from Q into @id while @@fetch_status = 0 begin
declare c cursor for
Select b.ssn, SaTrans.SyStudentID, satrans.date, satrans.type, SaTrans.SyCampusID, Amount = Case SaTrans.Type When 'P' Then SaTrans.Amount * -1 When 'C' Then SaTrans.Amount * -1 Else SaTrans.Amount END
From SaTrans , systudent b where satrans.systudentid = b.systudentid
I having a difficult time here trying to figure out what to do here.I need a way to scroll through a recordset and display the resultswith both forward and backward movement on a web page(PHP usingADO/COM)..I know that if I use a client side cursor all the records get shovedto the client everytime that stored procedure is executed..if thisdatabase grows big wont that be an issue?..I know that I can set up a server side cursor that will only send therecord I need to the front end but..Ive been reading around and a lot of people have been saying never touse a server side cursor because of peformance issues.So i guess im weighing network performance needs with the client sidecursor vs server performance with the server side cursor..I am reallyconfused..which one should I use?-Jim
In my ASP.NET app, I'm executing a stored procedure via a SQLCommand the searches a customer database. I believe the default timeout is 90 seconds. I'm curious of what happens to the SQL Server Stored Procedure after timing out from the ASP.NET application. Does it timeout at the same time or do you have to set up a value in SQL Server?
is this the best and fastest method to connect to a database for DataGrid databind?
--------- Dim MyConnection As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("ConnectionStringSQL")) Dim MyCommand As SqlCommand = New SqlCommand("sp_BuddiesPendingSelect1", MyConnection) MyCommand.CommandType = CommandType.StoredProcedure MyCommand.Parameters.Add(New SqlParameter("@UserID", intUserID))
MyConnection.Open() Dim dr As SqlDataReader = MyCommand.ExecuteReader()
DataList1.DataSource = dr DataList1.DataBind()
dr.Close() MyConnection.Close()
----------------------- or should i use a DataAdapter and fill a DataSet and then attach the DataSet to the DataGrid?
I have been using VB6 for a long time now and had no problems using ADODB.Recordset.I had a module to which I would send my recordset (byref) and the SQL command (byval) and use the resultant recordset for adding, modifying or deleting records.How can I do the same with VS2005? This is a major problem as there are dataadapters, grids, datareaders etc.Does someone have a simple method to get the recordset so that I can modify the record using the code (eg: .Addnew/.Delete/.Update) and Close the connection?Please note that I do not need to display anything and have to run 40/50 AddModDel for every click of the program.Any help is greately appreciated. Thanks in Advance.
If you not familiar with it, the <a href="http://www.stephenforte.net/owdasblog/permalink.aspx?guid=2b0532fc-4318-4ac0-a405-15d6d813eeb8">Rozenshtein Method</a> uses SQL to create a crosstab. The concept is a stroke of genius but I'm having trouble getting it to work on one of production databases.
I successfully used the Northwind example explained at Stephen Forte's site (see the link above)...but no luck on my real world problems.
I can get the date statements to resolve to 0 correctly, but when I try to aggregate the data - the statements are turning into 1 multiplying the aggregate data for each cell...which fills in the same data across the entire row.
For example (the columns represent the time period), GROUP T1 T2 T3 T4 group1 9 9 9 9 group2 3 3 3 3 group3 5 5 5 5
My sql code is: SELECT dbo.tblHassBatch.ProdLine, COUNT((dbo.tblHassUUT.UnitID)*(1-ABS(SIGN(datediff(dd,dbo.tblHassBatch.StartTime,ge tdate())-0)))) AS Today, COUNT((dbo.tblHassUUT.UnitID)*(1-ABS(SIGN(datediff(ww,dbo.tblHassBatch.StartTime,ge tdate())-0)))) AS [This Week], COUNT((dbo.tblHassUUT.UnitID)*(1-ABS(SIGN(datediff(mm,dbo.tblHassBatch.StartTime,ge tdate())-0)))) AS [This Month], COUNT((dbo.tblHassUUT.UnitID)*(1-ABS(SIGN(datediff(mm,dbo.tblHassBatch.StartTime,ge tdate())-1)))) AS [Last Month] FROM dbo.tblHassBatch INNER JOIN dbo.tblHassUUT ON dbo.tblHassBatch.BatchID = dbo.tblHassUUT.BatchID GROUP BY dbo.tblHassBatch.ProdLine
Am I overlooking something here? I'm pulling my hair out b/c if this works it's really going to provide a great solution for a project I'm working on...but I can't seem to figure it out.
I'm not really strong in SQL. My goal is to compare the beginning mileage of a vehicle record with it's previous ending mileage reading. I have something that works, but it feels clunky. I wonder if there is a better method, ie a join. Here's what I have:
SELECT A.Trolley_num, A.Date, A.Speedo_start, A.Speedo_end, (SELECT B.Speedo_end FROM Daily_Trolley AS B WHERE B.Trolley_num = A.Trolley_num AND B.Date = (SELECT Max(Date) FROM Daily_Trolley AS C WHERE C.Trolley_num = A.Trolley_num And C.Date < '1/23/2005')) AS PrevSpeedoEnd FROM Daily_Trolley AS A WHERE A.Date='1/23/2005'
ps: I inherited this db; I'm aware that "Date" should not have been used as a field name.
'TOP 1' or 'DISTINCT' or 'MAX' Any sugestions on which is better to use if I need to select a record that has the highest value - could be a INT or sometimes a DATETIME.
Can someone please tell me how to fix this following error in SQL 2005 When trying to create a maintenance plan, Method Not Found:'Void Microsoft.SqlServer.Management.DatabaseMaintenance.TaskUIYtils..ctro()' (Mircosoft.SqlServer.MaintenancePlanTasksUI)
Is there an efficient scripting method to update the connection string for ALL reports that reside on a reporting/web server? "(automating the process, rather than having to change the data source for each individual report that resides on that server)".
I have never used replication before and I have been asked to considerit in a project I am currently working on.I have created an application for a sales team which is loaded on theirmachines, it uses ms sql as its data source and connects via theinternet back to the central server in the office.Problem is this has shown to be too slow causing time out errormessages and so on. I have been told to research the possibility ofreplication, but am unclear what type of replication to use or where tostart.Any assistance would be appreciated.Regards,Ben
Hi,Given 2 tables:Table1:id Auto,int,PrimKeytable2id inttxt nvarchar50Table2:id Auto,int,PrimKeyorder intThe scenario: Table2.order defines how the table1.txt is should be ordered.Table1.table2id contains the id of the order. This cannot be changed :(How do I select all Table1.txt values but ordered by their correspondingvalues of the table2.order field?--Thx,PipHans---Outgoing mail is certified Virus Free.Checked by AVG anti-virus system (http://www.grisoft.com).Version: 6.0.516 / Virus Database: 313 - Release Date: 01-09-2003
HiSQL Server 7.0 using stored procedures.I need to do a SELECT Top but I always need to find the record countfor the entire SELECT statement.ID Name-- ----1 Abraham20 Barrington32 Callaway54 Dennis58 EmmettIf I do a SELECT TOP 3, I'll get the required records but get arecordcount of 3.I cant use the ROWCOUNT method either becuase the recordcount willalso be 3.I can see two different options for getting back the information Ineed:1 - Run the select statement twice, first to retrieve the recordcountand then with top to get the recordset2 - Use a temp table to get the entire recordset and recordcount, andthen extract the Top N recordsI'd like to know if anyone has any other suggestions. Currently, I'mtempted to go for the second option....ThanksSam
I want to implement the following query using SSIS Data flow Source component :
SELECT * FROM someTable WHERE someColumn = 'H'
How do I restrict the data coming from my data source? By that I mean how do I apply the WHERE clause in SSIS?! Should I use a conditional Split component?! but that would mean retrieving all records first then adding the split component (not the most efficient method surely).
I need to add a value to a column that I know to be DT_CY. However, there is no PipelineBuffer.SetCurrency() method or anything similar.
I checked out the docs for PipelineBuffer.SetDecimal() and it states "If the DataType of the buffer column is not DT_NUMERIC, an UnsupportedBufferDataTypeException occurs"
Similarly for PipelineBuffer.SetDouble() it says "If the DataType of the buffer column is not DT_R8, an UnsupportedBufferDataTypeException occurs"
So it seems I can't use either of those two methods. How do I push a valueto an output column of DT_CY when building an async component?
By the way, I could ask the same about
DT_DBDATE
DT_DBTIME
DT_FILETIME
DT_IMAGE
DT_TEXT
DT_NTEXT
DT_R4
DT_UI1 as well because according to the documentation there doesn't seem to be a method that supports those either. So, please could you answer the same question for those as well!
