We're constructing a three-tier application. We want the middle tier to
extract a recordset from the database, disconnect from the database,
then pass the recordset to the front tier. After changes have been made
by the front tier, it will pass the recordset back to the middle tier,
which will reconnect, and update the database.
The problem:
Using stored procedures, the recordset is no longer available
once the connection has been closed. Is there any way, using stored
procedures, to be able to keep the recordset available after the
connection has been closed, either by preserving it, copying it, or
otherwise?
What is the most efficient standalone .NET class that can hold a single disconnected record? The class must also retain column names, but other schema is not relevant (.NET data type is sufficient).If I understand System.Data.Common.DbDataRecord, it provides an interface on a DbDataReader, and has no storage of its own.I'm familiar with DataSet, is that the only .NET-standard class to do this? Thank you,Shannon
I am calling stored procedure called GetCommonItemCount within another stored procedure called CheckBoxAvailability, the first stored procedure should return a count to second stored procedure and based on that some logic will be executed.
I have 2 problems in that
1. The result is not coming from first stored so the variable called @Cnt is always 0 although it should be 18 2. At the end i need to see in the output the result from second stored procedure only while now i am seeing multiple results of record sets coming.
I have attached the scripts also, the line i described in step1 is
This is a C++ / ADO / SQL question. Maybe not the right forum but I am guessing there are some programmers out there ...
I am trying to use ADO disconnected recordset to insert data into a sql table. I am using AddNew(vField, vValue) with UpdateBatch(). The code below does not throw any exceptions ... but does not add data to the table.
Any comments are appreciated, Thanks, Chris
void CTestApp::TestDatabaseUpdateBatch1a(void) { int nDataCount = 0; long nIndex = 0; long nIndex2 = 0;
try { // When we open the application we will open the ADO connection pConnection.CreateInstance(__uuidof(Connection));
// Replace Data Source value with your server name. bstr_t bstrConnect("Provider='sqloledb';Data Source='SQLDEV';" "Initial Catalog='AlphaNumericData';" "User Id=cmacgowan;Password=cmacgowan");
// Open the ado connection pConnection->Open(bstrConnect,"","",adConnectUnspecified);
// Create an instance of the database pRecordset.CreateInstance(__uuidof(Recordset));
// Select the correct sql string. Note that we are creating an // empty string by doing a select on the primary key. We are only // doing inserts and we do not want to bring data back from the // server
csSQL = "SELECT * FROM dbo.AAMacgowanTest WHERE RecordId IS NULL"; // csSQL = "SELECT * FROM dbo.DICastRaw1Hr";
// Test to see if the recordset is connected if(pRecordset->GetState() != adStateClosed) { // The recordset is connected, we will see if we are // at the end
if((pRecordset->BOF) && (pRecordset->GetadoEOF())) { // The recordset is empty bIsEmpty = false; }
// COleDateTime is a wrapper for VARIANT's DATE type. COleVariant is // a wrapper for VARIANTs themselves. If you need to create a // variant, you can say: COleDateTime oledtCurrentDate2 = COleDateTime::GetCurrentTime();
// Convert the OleDateTime to the varient COleVariant vCurrentDateTime2(oledtCurrentDate2);
//Set the DATE variant data type. memset(&st, 0, sizeof(SYSTEMTIME)); st.wYear = 2000; st.wMonth = 1; st.wDay = 1; st.wHour = 12;
// vect is a vector of COleSafeArrays containing the records for(i = 0; i < 10; i++) {
// Setup the data nValueIndex = 0; vValueList[nValueIndex].vt = VT_BSTR; vValueList[nValueIndex].bstrVal = ::SysAllocString(L"BLUE"); nValueIndex++;
I've an issue while calling Oracle Stored procedure from MS SQL Server 2012 using LINKED SERVER, It gets connected and do the execution, But sometimes, it was disconnected and says this message 'A severe error occurred on the current command. The result if any should be discarded'.
I'm having a problem with two mirrored databases, using SQL Server 2005 SP2, that autmatically failed over last night for unknown reasons. I was trying to fail them back over to the primary SQL server because it says the mirror is disconnected and out of sync. Other databases failed over too, but I was able to fail those back over without a problem. It's just these two. I removed the mirror from the secondary server thinking that this would allow me to restore the database back on the primary server, but that didn't help.
These two databases show a status of (Principal, Disconnected / In Recovery) and I still cannot do anything with the two databases on the primary server. When I try to pull up the properties for them, I get the following error:
"Database <Name> is enabled for Database Mirroring, but neither the partner nor the witness server instances are available: the database cannot be opened.(Microsoft SQL Server, Error: 955)"
I cannot delete, detach, Alter or do anything with the databases. If I could just delete them that would be fine so I can just do a restore, but I can't seem to do anything.
Does anyone know what I can do to resolve this problem.
I have a mobile application written in vb.net using MsSQL and I want to use disconnected datasets to sync up to a remote MySQL database. is this possible? Its a two way sync, i.e I download and upload info.
Its been almost 10 years since I have had to do work with good-old RecordSet objects...
I am filling a RecordSet with data returned from a SQL server via a stored procedure. I then set the ActiveConnection property to Nothing in order to disconnect it so I can make changes to it.
But when I try to set the value on a given row I get back a "Multiple-step operation generated errors. Check each status value" error message. My understanding is that this is indicative of trying to use the wrong datatype. I have verified that the type is correct (I am dealing with integers) so I am at a loss for what the problem could be.
Oddly enough, when I look at the Attribute property of the field I get back a value of 112. When you break it down I think that value indicates the row value is read-only? (Could that be my problem? Just a really bad/unhelpful error message?) But if I try to change it I get back a message saying cannot be done since RecordSet is already open.
I have a .Net database application that we've successfully deployed in a connected environment. Now we have a client that has the need to store data on a central SQL Server and publish that data out to tablet PC's that will be able to disconnect from the central SQL Server. At some point those tablet PC's will come back in and connect to the central server via VPN and will need to push their changes back to the server. Some fundamental questions:
1) Am I correct in assuming that replication is the best way to accomplish this?
If so,
2) Which replication type sounds appropriate to the above scenario?
3) Am I correct in assuming that the tablet PC's will need some version of SQL Server to support editing of the data in the disconnected state?
My perhaps incorrect first take on this was that we could use a licensed SQL Server on the central server and SQL Server Express as a replication subscriber on the tablet PC's.
While a database upgrade schema changes were being made the Mirror became disconnected will this recover itself when it reconnects or will it be the case that we will have to copy the db files to the Mirror and set it up from scratch.
I have a system use MS SQL 2005 & .NET 2.0, my tables don't have rowversion, but I heard SQL 2005 manage a rowversion by itself, can I use this to do a "ConflictDetection".All I try to do is I want to get a error when I try to update a row which been modified by someone else after I read row. Thanks.
I'd like to throw this idea 'out there' to see if I'm missing something I'll later regret.
I'm looking to resolve a scalability issue within our point-of-sale program. Currently the PK on transactional tables (sales and orders) is created by the application layer using a 'MAX(PKCol) + 1' mechanism. Obviously this requires that all users of the system, whether they're local or remote, have current data at any time they wish to insert. It's this limitation I'd like to remove. Most sites are using MS SQL Server 2000. No sites use anything specific to a later version.
By having a PK that can be generated independently of a 'master' database we can overcome this issue. The PK values will need to be unique within a 'group' of shops and able to be generated by a program operating at any level. From 'head office' which manages a number of shops, to the server at a given shop and even the register / till itself should be able to create ID's while disconnected from the server (using a local database).
It seems there's three main ways to accomplish this: - Identities, - MachineID, CurrentPK composite. - GUID's
Identities: I've ruled out identities as I believe the administration overhead of dealing with them makes them impractical (there may be several hundred registers and therefore as many ranges to be set up within a group).
MachineID, CurrentPK composite: The MachineID references a Machine table which has an entry for each ethernet MAC address which connects to the database. The reason I chose to store the MAC in another table rather than simply using it as column is that I'm fetching it from sysprocesses.net_address(nchar(12)) and believe it's computationally cheaper to use an int than a text column. This mechanism means that we can still expose the PK to the user in some cases (eg: InvoiceNumber printed on a receipt). When the local database is not up to date (usually due to network problems) there will be cases where the CurrentPK will be duplicated but kept unique since it's coupled with the new MachineID. The big drawback to this method is that all current code will need to be revised to deal with the composite keys (this will be a significant amount of development).
GUIDs: Ugly to look at and time-consuming to type. They're not something which you'd expose to a user unmodified so realistically this means altering existing code to use a new 'user friendly' number where the PK is currently exposed to them. The use of GUIDs rule-out the use of clustered indecies on tables they're the PK for lest most inserts cause a page split. The splits would also necessitate more frequent index defrags / rebuilds. Using a non-clustered index incurs a penalty Vs a non-fragmented clustered one (doesn't it?) so while this avoids page-splits it comes at a cost.
After all that I think the best solution is to use GUIDs with a non-clustered index for each of the PK's. While it might not be the fastest of the options (slower reads/joins Vs composite PK) it will be significantly faster to develop while maintaining acceptable performance.
set rsSearch = Server.CreateObject("ADODB.Recordset") rsSearch.CursorLocation = adUseClient rsSearch.LockType = adLockBatchOptimistic
sSql = "some sql stmt" 'this works fine on its own
rsSearch.Open sSql, cnTraining
set rsSearch.ActiveConnection = nothing
cnTraining.Close set cnTraining = nothing
%>
My goal is to get a disconnected recordset. The problem here occurs when i try to use the adUseClient value (3) for the CursorLocation. If I don't use a 3 in the CursorLocation it works fine. Hoewever i'm almost certain i have to use the 3 in order to disconnect the recordset. Any ideas? Is my connection string not set up properly to get a disconnected recordset?
We have mirroring set up on SQL 2005(SP2) on windows server 2003 servers for 6 production servers to DR servers. It is high performance mode(asynchonous). We are using fully qualified server names with default 5022 port. Prod and DR are using same domain service account.
We had network outage for about 30 minutes last weekend and after that network was restored back to normal. Also few SQL 2000 servers have logshipping and it automatically started syncing up after network was restored. However mirroring didn't start automatically. Partners were in disconnected state and endpoints were stopped. For one database, log grew to 40 GB using most of the disk space.
Then we maually had to run
ALTER ENDPOINT Mirroring STATE = STARTED
and then it started syncing up.
Now the question is why it doesn't start syncing up automatically after network is back to normal and recognize the partner? Is there anyway we can setup timeout or any parameter like that to specify how many times or how long partners try to connect with no luck and then give up?
We're using ADO disconnected recordsets. On SQL 2000, we could update these on the client (without propagating the changes to the server) even if the underlying view or table was non-updatable.
When running our apps against SQL 2005 (using the same client-side environment), we can no longer change any attributes of those disconnected recordsets, that connect to a non-updatable database object (the rest of the app runs fine, we can update all updatable database objects through disconnected recordsets) . Does SQL 2005 respond to such calls differently from SQL 2000, so that ADO recordsets are built in a new way (which makes them read-only in our setting)?
I have an update query in an OLE DB Destination (access mode: SQL Command) that updates a table with an INNER JOIN from another table in another database. I'm getting the error, "No disconnected recordset available for the specified SQL statement". Does this have to do with the SQL query trying to access the other database? How can I get around this error?
I am having trouble setting up my Pull Subscription and I am new to replication.
I have several servers hosting a databased website that will be the same, except for user input and traffic. Quite simply, I need to copy most tables, SPs and data from network to network. I can't use FTP/Web synch ... as I mentioned the networks do not touch eachother or the internet.
On server Web1, it was easy to create a Publication called Pub via the wizard for my database: TheDB. Then on Web1, again, I added a Subscription to the Publication, indicating my second server, Web2, and the same database name: TheDB (I have already backed up and restored TheDB to all my servers). Here's one of the sp's I ran on Web1:
I copied the snapshot folder, ie. 20070709134423, onto CD and moved it into Web2's default replication folder, but I always receive: cannot connect to Distibutor. I've tried using an Alias, as well, but don't understand exactly how I should point that either. I checked the publication's PAL and my Web2 user has rights and is an owner of the Web2 TheDB database.
I setup an availability Group. (Only 2 servers - Primary And secondary) -- 21 , 22
I also define an listener . IP .. 23
1- In First step I connected To Listener (23) And in a while I inserted A record to a table .
While 1=1 insert into Tbl_T1(f1,f2) Values (1,2)
2- in second, I Stop the primary .
- I expected this while whitout disconnect, continue.
3- The while code stopped whit this message :
Msg 64, Level 20, State 0, Line 0 A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
4- I execute again the script, And it worked in new primary.
My questions :
1- is the listener disconnected between switched primary and secondary ? OR have we data loss between switching?
2- I did some huge update on Primary that fill the Log fiel space. And in last Update I got this error :
Msg 9002, Level 17, State 2, Line 27
The transaction log for database 'Your_DB' is full due to 'LOG_BACKUP'.
Is this (Fill All space) a reason to switch primary? Or not ?
I'm new to MDX and was hoping someone could answer this question. I'm working on an MDX query, a simplified version is below.
What I'm trying to do is to pull 2 sets, based on a date range. Based on those, I'd like to see the total "cost" measure for each set, and divide one by another.
What I'm finding is that when I run the query below, the cost is broken out by month. So, my select statement gives me the cost for January 2008 and February 2008 in the CurrentPeriod set, and for January, February, etc. 2007 in the PriorPeriodData set. What I want instead is to get the total "cost" measure for all the months in each set. I believe this is what I'd get if I put the date range in a subcube or a where clause - but in that case, I wouldn't be working with 2 distinct sets.
Is there some other way to write this, or to combine all the months in the set before the measures?
PLEASE SEE my update (post #3) for a better simpler explanation!!!!!
Hi, I need a query which is basically
(query 1) Except (query 2)
SQL server supports (query 1)Union (query 2) but I can't get the Except to work.
Alternatively, I also tried to implement it by using the "NOT IN" but didnt work. Background: 3 tables, accnts, Opty, Opty_postn I want the accounts who have 1 or more opty's at 100% (sold) before 1/1/2002 but zero opty's at 100% after 12/31/2001. accnts has fields ID & name, ROW_ID opty has fields acct_id, prob, ROW_ID opty_postn has fields opty_id, close_dt
My query: SELECT accnt.name FROM accnt WHERE accnt.ROW_ID IN ( SELECT acct_id FROM opty where prob = 100 AND opty.ROW_ID IN (SELECT opty_id FROM opty_postn WHERE close_dt<1/1/2002) ) AND accnt.ROW_ID NOT IN ( SELECT acct_id FROM opty where prob = 100 AND opty.ROW_ID IN (SELECT opty_id FROM opty_postn WHERE close_dt >12/31/2001) ) AND accnt.ROW_ID = opty.accnt_ID
my intent was select account.names where id is in set(prob = 100 & sale before 1/1/02) but not in ( prob = 100 & sale after 21/31/01) SO ,the accounts which have sales both before and after get counted. But I want only those accoutns which have sales only before 1/1/02. I hope i explained this right. Thanks in advance for your help.
Hi,I've tried without success to create a function where one of theparameters determines the final line of a select statement.The final line includes a 'where referencenumber in (@set)' line.. and@set is the parameter I wish to use which is a string.If the set is just one value, it works fine, however with anything morethan that I just get no records returned.. If I output the parameter,and copy and paste that into query analyser I do get the correct result,so it's nothing to do with string delimiters etc..Any ideas to fix this problem? Or am I going to have to dynamic sql thewhole thing?Cheers,Chris
I need to manipulate some sets, doing joins based on intersection, and looking for subsets. Is there any way to store an array in a single data field? And then do operations based on those array lists? e.g. -
{1,2,3} intersect {2,3,4} ==> {2,4} (would like to then be able to do joins based on intersection, so that I could say, return all cases where two sets have all but one member from each in common...)
I have a client who needs to copy an existing sale. The problem isthe Sale is made up of three tables: Sale, SaleEquipment, SaleParts.Each sale can have multiple pieces of equipment with correspondingparts, or parts without equipment. My problem in copying is when I goto copy the parts, how do I get the NEW sale equipment ids updatedcorrectly on their corresponding parts?I can provide more information if necessary.Thank you!!Maria
Hi, I'm currently trying to retrieve results from a large dataset, there are over 45000 records and I need to use them all to peform counts etc. I have set up views, but my page is still being returned slowly, is there anything I can do to speed this up? Thanks Gemma
I am trying to query one table and get two different timeperiods of data, I am summing monthly totals to provide a running year total, but I also need last month's total in a seperate column. This is what I have so far but the subquery makes me group it which provides duplicate grouping.DECLARE @LASTPD AS INT SET @LASTPD = (SELECT MAX(LASTPERIOD) FROM TABLE) SELECT NAME, POST_PD AS [MONTH],SUM(CHARGE_AMOUNT) AS MONTHLY_$, LASTMONTH.LAST_MONTH,(SELECT SUM(CHARGE_AMOUNT) AS LAST_MONTH FROM TABLE INNER JOIN TABLE2 ON TABLE2.NAME = TABLE.NAME WHERE POST_PD = @LASTPD AND TABLE2.NUM= 539 GROUP BY NAME) AS LASTMONTH INTO #TEMP_SAFROM TABLE INNER JOIN TABLE2 ON TABLE2.NAME = TABLE.NAME,(SELECT SUM(CHARGE_AMOUNT) AS LAST_MONTH FROM TABLEWHERE TABLE2.NUM = 539 GROUP BY NAME, POST_PDORDER BY NAME, POST_PD SELECT NAME, LAST_MONTH, CAST(SUM(MONTHLY_$)AS DECIMAL(20,2)) AS YEARLY_$ FROM #TEMP_SA GROUP BY NAME ORDER BY NAME
I need to upgrade a 6.5 box to 7.0 but also change the character sets. Let me know how this sounds.
-Have a 2nd machine w/ 6.5 on it and same char sets. -backup/restore data from prod box to 2nd machine. -upgrade 2nd machine to 7.0 using the same char sets. -uninstall prod machine and install 7.0 w/ new char set. -use dts to move data from 2nd machine to new machine. (changing char sets from old to new)
they are not necessary mutual exclusive. thus, union is not good. However, when I use derived table method, I will have 'dups' on column of 'Region' and 'county', 2 total are fine.
