Slow performance in W2K using Oracle ODBC Driver

My company is upgrading our NT4 servers to W2K. One or our App servers is running MTS with several packages, one of those being a dataaccess package that is responsible for all data actions.
In testing the OS upgrade, I found considerable performance degradation with our data access package. I finally solved the problem by changing the ODBC driver from Oracle ODBC Driver to the Microsoft ODBC for Oracle Driver. I have also found that under XP, I can still retain the use of the Oracle ODBC Driver without any performance hits.
All systems currently have the 8.1.7 Oracle Client and MDAC 2.7. I have also tried the Oracle Objects for OLE with similar performance losses in W2K.
More info about the problem...
In using the Oracle ODBC Driver, I connect this way -
Dim RS As ADOR.Recordset
Set RS = CreateObject("ADOR.Recordset")
RS.ActiveConnection = "DSN=" & p_strDSN & ";" & "uid=" & strUser & ";pwd=" & strPassword & ";"
RS.Source = "Select stuff from aTable"
RS.LockType = adLockReadOnly
RS.Open
Using W2K, I found that the majority of processing time comes from the RS.ActiveConnection call, not from object creation.
I would like to use an Oracle developed driver to connect to my database, however, I am forced to use the Microsoft driver. I have not seen any similar problem on this message board, nor have I seen any mention of this in MSDN's discussion board. Can anyone shed some light on what is going on?
Thanks,
Matt

The performance lag we have been seeing is in the milliseconds, but when we make repeated calls, those milliseconds add up. I am seeing a difference of about 7 - 10 milliseconds each call between the Oracle ODBC Driver and the Microsoft driver.
TNSPings seem quick in all setups as does the connection tests.
The Oracle ODBC driver version is 8.01.07.00. I haven't tried the new 8.01.07.6+ drivers yet. I'll give them a shot and reply back with results in a day or so.

Similar Messages

Not able to connect to database using Oracle ODBC Driver

Hi,
I have installed Oracle client on a system. there are 2 homes installed. When I check the ODBC administrator, I see that only one ODBC driver is present. There are Net 8 services configured in both the homes.
When I try to connect to a database with the services configured in the second home using the ODBC driver, I am getting an error that the TNS name could not be resolved.
How can I use the ODBC driver to connect to the databases using services defined in the second home?
The name of the ODBC driver is 'Oracle in <firsthomename>
Thanks & Regards

Hi,
Thanks for the help.
I tried this, but it doesn't work. I'm still getting the error.
Now I am not able to create a DSN when I set the ORACLE_PATH to the second home. It says 'the setup routines for the Oracle in ora1 ODBC Driver could not be loaded due to system error code 998.'
Any other solution?
Thanks in advance & Regards
Anuja

Oracle ODBC Driver 10.02.00.04 sqora32.dll with /*+ RULE */ base hints

Hi Everybody,
I have a problem with SQL queries with /*+ RULE */ base hints being posted to an Oracle database. I have reason to believe that these queries are generated by the Oracle ODBC Driver itself. Although I don't have a performance problem per se, I need to reduce these hints to a minimum so we can fine-tune the database as a whole.
* The views that are hit are always the same: All_Objects, All_Arguments, All_Synonyms,
* We are using Oracle ODBC driver 10.02.00.04 for Windows, the database server is a RS6000 with AIX and Oracle 10g,
* Aside Oracle Development tools, there are no applications, reports or similar gadgets that query the tables described above.
I would really appreciate any help about this issue.
Here is an example of the type of queries that I'm writing about:
SELECT /*+ RULE */ '', b.owner, decode (b.object_type, 'PACKAGE', CONCAT( CONCAT (b.object_name, '.'), a.object_name), b.object_name), NULL, NULL, NULL, NULL, decode (b.object_type, 'PACKAGE', decode(a.position, 0, 2, 1, 1, 0), decode(b.object_type, 'PROCEDURE', 1, 'FUNCTION', 2, 0))
FROM ALL_ARGUMENTS a, ALL_OBJECTS b
WHERE ( b.object_type = 'PROCEDURE' OR b.object_type = 'FUNCTION' ) AND b.object_id = a.object_id AND (a.sequence=1 OR a.sequence=0) AND b.OBJECT_NAME = 'MYTABLE' AND b.OWNER = 'MYSCHEMA' UNION
SELECT /*+ RULE */ '', b.owner,b.object_name,NULL, NULL, NULL, NULL,decode(b.object_type, 'PROCEDURE', 1, 'FUNCTION', 2, 0)
FROM ALL_OBJECTS b
WHERE (b.object_type = 'PROCEDURE' OR b.object_type = 'FUNCTION') AND b.OBJECT_NAME = 'MYTABLE' AND b.OWNER = 'MYSCHEMA' UNION
SELECT /*+ RULE */ distinct '', a.owner,CONCAT(CONCAT (a.package_name, '.'), a.object_name),NULL, NULL, NULL, NULL,decode(a.position, 0, 2, 1, 1, 0)
FROM ALL_ARGUMENTS a
WHERE (a.sequence=1 OR a.sequence=0) AND a.OBJECT_NAME = 'MYTABLE' AND a.OWNER = 'MYSCHEMA' ORDER BY 2,3
Best Regards,
Manuel
Edited by: user10165637 on Jul 28, 2009 1:29 PM

Hi Greg,
Thank you for your answer. One of the things that we did when we migrated to Oracle 10g was to ensure that the "Disable Rule Base Hints" flag, located in the "Work-arounds" tab in the ODBC DSN window is checked. We previously refreshed all Microsoft's Access databases to use this new DSN connection. Still, the hints are there.
However... we may have been able to link these calls to these Oracle System Catalog views, with a custom application that launces Crystal Reports.
Although we all know that Crystal Reports also caches ODBC DSN configuration settings, I must say that these same Crystal Reports do not generate hints when called from their InfoView server.
We will proceed to modify the custom application, overridding the dissable rule-base hint work-around with the string "DRH=T" on the connection string. Next week we will know if this works.
Best Regards,
Manuel

How can I do to get Oracle ODBC driver in Windows?

Hello,
Please, I need help to use Oracle ODBC driver in Windows 7. I installed Oracle Client 10g with the ODBC driver, but I can't use it. OracleODBC driver don't appear in the driver list when I want to create a new datasource. How I can do to get Oracle ODBC driver for create a new datasource?
Thank
Edited by: user4528703 on 13 mars 2010 02:01

Hello,
To get the ODBC driver you should run a custom Oracle Client installation and Select
Oracle Windows Interfaces 10.2.0.1.0.
Then, you'll get the Oracle ODBC Driver 10.2.0.1.
But, be aware that Oracle didn't certify Windows 7.
So, if afterwards, you experience some trouble, think to install Oracle with Xp compatibilty mode, or
wait to Oracle 11.2.0.1 which will be certified on Windows 7.
Hope this help.
Best regards,
Jean-Valentin

ODBC error using ORACLE MERANT DRIVER

Hi,
OS-windows 7 64bit
Oracle Database 11g-64 bit
Oracle Merant Driver 32 is installed(SysWOW64) when install DAC. so can't connect using Oracle merant driver 32 with Oracle Database 64bit. it's showing the below error.
How can connect Oracle Merant Driver 32 bit with Oracle database 64 bit. kindly check how to resolve this.
Error:
Specified driver could not be loaded due to system error 193:
\DataDirectODBC\seor820.dll)

You may also try Oracle's odbc drivers available free from OTN
see also http://support.microsoft.com/support/kb/articles/Q159/6/57.asp
Oracle procedure is:
CREATE OR REPLACE PROCEDURE test(
a OUT integer,
b out integer)
AS
BEGIN
a:=100;
b:=200;
END;
I have verified output values with oracle odbc 8.1.6 and OLEDB 8.1.6
Turloch

ASP connection to Oracle using MS ODBC Driver fails

I have a Win2000 server with ORCL9.2 client and MDAC2.7 and the following code fails (last line gives the error):
set dbConn = Server.CreateObject("ADODB.Connection")
set rsSeq = server.CreateObject("ADODB.Recordset")
sSql = "Select count(*) From bs_table"
dbConn.Open "DSN=tp10;UID=aaa;PWD=aaa;"
The error text is :
Microsoft OLE DB Provider for ODBC Drivers (0x80004005)
[Microsoft][ODBC driver for Oracle][Oracle]Error while trying to retrieve text for error ORA-01019
This code works fine with Oracle 8i client on the server, I really appreciate if any one can help me out here.
Thanks

Can you try with the Oracle ODBC driver, rather than the Microsoft ODBC driver for Oracle? Microsoft's driver still uses the old Oracle 7 OCI calls, which are no longer supported on an Oracle 9.2 client.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

How to detect which Oracle ODBC Driver is installed using VBA Excel

Hi,
I have an excel workbook containing database queries that uses an oracle ODBC driver to update data. However different machines have different versions of the ODBC drivers installed and so although the code works on my machine, it doesn't on others because the ODBC connection reference is different.
So as a first step, I would like Excel to automatically find what ODBC drivers are installed when the macro is run so that I could dynamically change the ODBC connection reference depending on what drivers are installed.
The connection strings relating to ODBC drivers are in following formats:
Machine A: "ODBC;DRIVER={Oracle OraDb11g_home1}
Machine B: "ODBC;DRIVER={Oracle in instantclient11_1}
ETC
All machine run windows XP.
Alternatively would there be an easier way to connect to a shared orcale database without the need of installing any additional drivers?
Thanks,
Lucas

Problem with Excel & ODBC drivers really has NOTHING to do with Oracle RDBMS.
I suggest you tag your post as "Off Topic" & post it in some Excel forum instead.

MS ODBC or Oracle ODBC driver?

Can anyone tell me which is the correct driver to use when developing front end MS Access 2003 to retrieve and update data on a Open VMS platform with Oracle 8.1.7.3 database?
I have serval Access 2000 databases that run on most WinNT or W2K clients with a couple of W2K Dell exceptions. These Access 2000 db's connect to the Oracle database using linked tables and SQL pass-through queries that work with ODBC Manager-DNS system setup using the Microsoft for Oracle ODBC driver.
Now we are upgrading to Office Pro 2003 so new W2K images have been setup with Oracle 8.1.7 Client. SQL*Plus works on these clients but when I create the System DNS the Access databases return an error "ODBC connection failed". I can however connect with a pass-through query using Oracle's ODBC driver. Not enough time in roll-out plan to change the ODBC connection string in hundreds of Access SPT queries.
Please help!
Bonnie

if you still need assistance reagarding this...email me directly..
shah
null

Error in connecting oracle odbc driver 9.1.0.8

java.SQLException:[Microsoft][ODBC Driver Manager][Driver's SQLAllocHandle on SQL_HANDle_ENV failed
this error is raised when connecting oracle 9i database using oracle odbc 9.1.0.8 driver. please help me

java.SQLException:[Microsoft][ODBC Driver Manager][Driver's SQLAllocHandle on SQL_HANDle_ENV failed
this error is raised when connecting oracle 9i database using oracle odbc 9.1.0.8 driver. please help me

Insert into CLOB fails with Oracle ODBC driver version 9.02.00.65

I tried to insert into CLOB using the latest Oracle ODBC driver 9.02.00.65 and it fails. But the same works with earlier versions of ODBC driver earlier to 9.02.00.65 ie., 9.02.00.63.
Here is the code snippet I tried. Any help now is highly appreciated as I am in the crunch time.
I tried the same code snippet with VARCHAR2 column with the same driver and it works.
** CONVDSN.C - This is the ODBC sample code for
** creating File DSN pointers to machine DSNs.
**This code is furnished on an as-is basis as part of the ODBC SDK and is
**intended for example purposes only.
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <sql.h>
#include <sqlext.h>
#include <odbcinst.h>
#include <sqltypes.h>
#define MAXDATALEN 25 //maximum data length per column
#define MAX_COL 15 //maximum column in result set
#define MAX_ROW 100 //maximum number of rows
#define MAXBUFLEN 256
#define SQLERR_FORMAT "SQL Error State:%s, Native Error Code: %lX, ODBC Error: %s"
#define MAXDISPLAYSIZE MAX_COL*(MAXDATALEN+1)
#define SQLWRNMSGTITLE "SQL_SUCCESS_WITH_INFO results"
#define SQLERRCNTDTITLE "SQL_ERROR results continued"
#define SQLWRNMSGTITLE "SQL_SUCCESS_WITH_INFO results"
#define SQLWRNCNTDTITLE "SQL_SUCCESS_WITH_INFO results continued"
#define NULLDATASTRING "SQL_NULL_DATA"
#define SQLERRMSGTITLE "SQL_ERROR results"
// prototypes
void ExpandFileName(LPSTR szFileDSNName, LPCSTR szDSNName);
void MakeLegalName(LPSTR szLegalDSNName, LPCSTR szDSNName);
// main routine: Iterate through the user and system DSNs, creating a pointer
// to each.
void FAR PASCAL DisplayError(SQLRETURN nResult, HWND hWnd, SWORD fHandleType, SQLHANDLE handle);
void insertSelectClob();
void checkRcCode(RETCODE rc);
int main (int argc, char* argv[])
     insertSelectClob();
return 0;
void FAR PASCAL DisplayError(SQLRETURN nResult, HWND hWnd, SWORD fHandleType, SQLHANDLE handle)
     UCHAR szErrState[SQL_SQLSTATE_SIZE+1]; // SQL Error State string
     UCHAR szErrText[SQL_MAX_MESSAGE_LENGTH+1]; // SQL Error Text string
     char szBuffer[SQL_SQLSTATE_SIZE+SQL_MAX_MESSAGE_LENGTH+MAXBUFLEN+1];
     // formatted Error text Buffer
     SWORD wErrMsgLen; // Error message length
     UDWORD dwErrCode; // Native Error code
     int iSize; // Display Error Text size
     SQLRETURN nErrResult; // Return Code from SQLGetDiagRec
     SWORD sMsgNum = 1;
     SWORD fFirstRun = TRUE;
     char szDispBuffer[MAXDISPLAYSIZE+1]; // Display Buffer
     szBuffer[0] = '\0';
     do
          // continue to bring messageboxes till all errors are displayed.
          // more than one message box may be reqd. as err text has fixed
          // string size.
          // initialize display buffer with the string in error text buffer
          strcpy(szDispBuffer, szBuffer);
          // call SQLGetDiagRec function with proper ODBC handles, repeatedly until
          // function returns SQL_NO_DATA. Concatenate all error strings
          // in the display buffer and display all results.
          while ((nErrResult = SQLGetDiagRec(fHandleType, handle, sMsgNum++,
               szErrState, &dwErrCode, szErrText,
               SQL_MAX_MESSAGE_LENGTH-1, &wErrMsgLen)) != SQL_NO_DATA)
               if(nErrResult == SQL_ERROR || nErrResult == SQL_INVALID_HANDLE)
               break;
               wsprintf(szBuffer, SQLERR_FORMAT, (LPSTR)szErrState, dwErrCode, (LPSTR)szErrText);
               iSize = strlen(szDispBuffer);
               if (iSize && (iSize+strlen(szBuffer)+1) >= MAXDISPLAYSIZE)
               break;
               if (iSize)
               strcat(szDispBuffer, "\n");
               strcat(szDispBuffer, szBuffer);
          // display proper ERROR or WARNING message with proper title
          if (nResult == SQL_SUCCESS_WITH_INFO)
               MessageBox(hWnd, szDispBuffer, (fFirstRun? SQLWRNMSGTITLE : SQLWRNCNTDTITLE),
               MB_OK | MB_ICONINFORMATION);
          else
               MessageBox(hWnd, szDispBuffer, (fFirstRun? SQLERRMSGTITLE : SQLERRCNTDTITLE),
               MB_OK | MB_ICONEXCLAMATION);
          if (fFirstRun)
               fFirstRun = FALSE;
     while (!(nErrResult == SQL_NO_DATA || nErrResult == SQL_ERROR || nErrResult == SQL_INVALID_HANDLE));
void insertSelectClob()
SQLCHAR clobdata[1001];
SQLCHAR resultdata[1001];
SQLINTEGER ind = SQL_DATA_AT_EXEC;
SQLCHAR *bufp;
     SQLINTEGER cbOrderID = sizeof(SQLSMALLINT);
     SQLSMALLINT sTmp=13;
     SQLCHAR *sqlStmt1 = _T("INSERT INTO clobtbl(id, clob1) VALUES(?, ?)");
     SQLCHAR *sqlStmt2 = _T("SELECT id, clob1 FROM clobtbl");
//     SQLCHAR *sqlStmt1 = _T("INSERT INTO testInsert(id, clob1) VALUES(?, ?)");
// SQLCHAR *sqlStmt2 = _T("SELECT id, clob1 FROM testInsert");
int clobdatalen, chunksize, dtsize, retchklen;
     HENV envHnd;
HDBC conHnd;
HSTMT stmtHnd;
RETCODE rc;
     int nRowcnt=0;
     SQLPOINTER pToken = NULL;
rc = SQL_SUCCESS;
// ENV is allocated
rc = SQLAllocEnv(&envHnd);
// Connection Handle is allocated
rc = SQLAllocConnect(envHnd, &conHnd);
rc = SQLConnect(conHnd, T("testd734"), SQLNTS, T("ipathdba"), SQLNTS, T("ipathdba"), SQLNTS);
printf(_T("Insert CLOB1 using SQLPutData...\n[%s]\n"), sqlStmt1);
// Set CLOB Data
int i;
SQLCHAR ch;
for (i=0, ch=_T('A'); i< sizeof(clobdata)/sizeof(SQLCHAR); ++i, ++ch)
if (ch > _T('Z'))
ch = _T('A');
clobdata[i] = ch;
clobdata[sizeof(clobdata)/sizeof(SQLCHAR)-1] = _T('\0');
clobdatalen = lstrlen(clobdata); // length of characters
chunksize = clobdatalen / 7; // 7 times to put
     rc = SQLAllocHandle(SQL_HANDLE_STMT, conHnd, &stmtHnd);
// Step 1: Prepare
rc = SQLPrepare(stmtHnd, sqlStmt1, SQL_NTS);
// checkSQLErr(envHnd, conHnd, stmtHnd, rc);
// Step 2: Bind Parameter with SQL_DATA_AT_EXEC
rc = SQLBindParameter(stmtHnd,
1,
SQL_PARAM_INPUT,
SQL_C_SSHORT,
SQL_INTEGER,
0,
0,
&sTmp,
0,
&cbOrderID);
rc = SQLBindParameter(stmtHnd,
2,
SQL_PARAM_INPUT,
SQL_C_CHAR,
SQL_LONGVARCHAR,
clobdatalen*sizeof(CHAR),
0,
(SQLPOINTER)clobdata,
clobdatalen*sizeof(CHAR),
&ind);
// checkSQLErr(envHnd, conHnd, stmtHnd, rc);
// Step 3: Execute
rc = SQLExecute(stmtHnd);
     while (rc == SQL_NEED_DATA) {
          rc = SQLParamData(stmtHnd, &pToken);
          if (rc == SQL_NEED_DATA) {
               for (dtsize=0, bufp = clobdata;
                    dtsize < clobdatalen;
                    dtsize += chunksize, bufp += chunksize)
               int len;
               if (dtsize+chunksize < clobdatalen)
                    len = chunksize;
                    rc = SQLPutData(stmtHnd, bufp, len*sizeof(SQLCHAR));
               else
                    len = clobdatalen-dtsize;
                    rc = SQLPutData(stmtHnd, bufp, SQL_NTS);
          rc = SQLParamData(stmtHnd, &pToken);
// Fails as row count retrieved is zero.
     rc = SQLRowCount(stmtHnd, &nRowcnt);
     if(rc != SQL_SUCCESS)
          DisplayError(rc, NULL, SQL_HANDLE_ENV, conHnd);
rc = SQLFreeStmt(stmtHnd, SQL_CLOSE);
printf(_T("Finished Update\n\n"));
rc = SQLAllocStmt(conHnd, &stmtHnd);
if (rc != SQL_SUCCESS)
printf(_T("Failed to allocate STMT\n"));
exit(-1);
// Clear Result Data
memset(resultdata, 0, sizeof(resultdata));
chunksize = clobdatalen / 15; // 15 times to gut
rc = SQLExecDirect(stmtHnd, sqlStmt2, SQL_NTS); // select
     if(rc != SQL_SUCCESS)
          DisplayError(rc, NULL, SQL_HANDLE_ENV, conHnd);
// Step 2: Fetch
rc = SQLFetch(stmtHnd);
for(dtsize=0, bufp = resultdata;
dtsize > sizeof(resultdata)/sizeof(CHAR) && rc != SQL_NO_DATA;
dtsize += chunksize-1, bufp += chunksize-1)
int len; // len should contain the space for NULL termination
if (dtsize+chunksize<sizeof(resultdata)/sizeof(CHAR))
len = chunksize;
else
len = sizeof(resultdata)/sizeof(CHAR)-dtsize;
// Step 3: GetData
rc = SQLGetData(stmtHnd,
2,
SQL_C_CHAR,
(SQLPOINTER)bufp,
len*sizeof(CHAR),
&retchklen);
if (!_tcscmp(resultdata, clobdata))
printf(_T("Succeeded!!\n\n"));
else
printf(_T("Failed!!\n\n"));
     if (conHnd)
          SQLFreeConnect(conHnd);
     if (envHnd)
          SQLFreeEnv(envHnd);
}

Hi,
Since 9.2 has been desupported for error correction you will not be able to download that version from OTN. You should ask whoever is providing the training if their is an alternate version you can use. The only versions that you will be able to download from oracle.com is 10.2 11.1, and 11.2.

How to select active Oracle ODBC Driver programmatically?

Hi,
My application creates ODBC DSN to connect with Oracle 10g database server. I need to find out Oracle Driver installed on the system programmatically. I am trying to read KEY_<PRODUCT NUMBER> registry key and eventually searching ORACLE_HOME value. This helps me in searching Oracle Driver in ODBCINST.INI registry key. (Oracle in OraDb10g_home1)
If multiple Oracle clients are installed on the same system, multiple KEY_<PRODUCT NUMBER> registry keys and oracle drivers would be available. I am not sure which and how to select the current active oracle driver.
Oracle in OraDb10g_home1
Oracle in OraDb10g_home2
Can anybody help me out? Can I use inventory file (inventory.xml) to determince current active home directory? Reading PATH environment variable to identity active home directory would be tedious.

Please look at following thread for answer.
How to select active Oracle ODBC Driver programmatically?

Oracle ODBC Driver 8.1.7.8b causing MFC OpenEx() delay

Hi:
I have installed the Oracle ODBC Driver version 8.1.7.8b on a WINNT 4.0 Workstation with SP6a. I have an MFC test app with the following code:
PostStatus(ERROR_NOERROR, APP_NAME, "Calling OpenEx()");
CDatabase db;
if(db.OpenEx(_T("DSN=MYTESTDSN;UID=USERID;PWD=PASSWORD"), CDatabase::openReadOnly|CDatabase::noOdbcDialog))
     PostStatus(ERROR_NOERROR, APP_NAME, "OpenEx() success,calling Close()");
     db.Close();
} // OpenEx()
else // OpenEx() error
     PostStatus(ERROR_MODERATE, APP_NAME, "Error opening database,OpenEx() failed!");
The above OpenEx call is taking upto 3 seconds to return. When I use Microsoft Oracle ODBC driver, it takes less than 0.5 sec to connect/disconnect.
Any idea why OpenEx() is taking that long? I've compiled this using VC++ 6.0 SP5, on a WIN2K and WINNT system but I get the same result.
Thanks,
Amit.

This forum is for feedback about the OTN program and problems with OTN accounts. Technical questions cannot be answered here. Please post your question in the appropriate product or technology forum. http://forums.oracle.com/forums/index.jsp?cat=48

Download and installing oracle odbc driver alone

Hi all,
I wanted to find out if I can download just the oracle odbc driver and install in without actually installing oracle database or client version on windows PC.
thank you

You will need to have some Oracle software on your machine for the Oracle ODBC driver to function.
If you can use the 10g client, you can install the 10g Instant Client and the ODBC driver. The Instant Client is a minimal set of libraries that allow components like the Oracle ODBC driver to work. The 10g client, though, is not certified to connect to databases earlier than 8.1.7.
If you have to use an earlier version, you have to install the full Oracle client, which is not a small install, to be able to use the Oracle ODBC driver.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Crystal Report Oracle ODBC driver invalid Thai character display problem

Hi,
   My server has CR Oracle ODBC 5.1 installed on last week. We have several reports in the servers which called by our Application to export to text file and pdf file. Sometimes, the output (both text file and pdf file) can't display Thai character correctly. The text file show Thai character in question mark and pdf file show in square box. This problem occur randomly and disappear without doing anything. Sometimes the problem occur for an hour and gone but sometimes occur 10-15 minutes and gone. This problem also not happen every days. Once the problem occur, all reports with Thai character will fail.
   However, we have another server installed the same Application, same OS level, same OS patches and same CR Oracle ODBC driver version installed on the same time as above server (the problem server). This server does not have any problems.
   Any suggestions would be appreciated.
Best Regards,
Noppadon S.

Hi Noppadon,
Thank you for the info. If it happens randomly in their application then it's something they need to debug. Could even be in the ODBC driver.
I suggest you tell them that because it works sometimes it shows the issue is likely in their software because if it failed all the time then it would be in Crystal dll's. They need to debug the problem, suggest they use tools like Process Monitor from www.sysinternals.com to step through to see where or what part is failing. If they having logging abilities that may help to find out what step is failing and in which API.
At this point we have no way of determining where the problem is, it's failing in their application and no one but them know what or how they are using CR runtime files.
If you can duplicate the problem using Crystal Report Designer then it's our problem, if not they have to help you to show us it is a CR issue.
Sorry we can't be of more help but without know their code we can't suggest anything to try. Suggest they log a call with support here to help them debug the problem if they don't know what to do.
Thank you
Don

Oracle ODBC Driver adds bind variable when browsing whole table in Access

Hi, we are looking for some reasons why we may see this behavior in the Oracle ODBC driver (10gR2 and 11g) when using Microsoft Access (2003 or 2007)...
1) Link a table from the Oracle database.
2) Double-click the newly linked table to "browse" it.
Oracle sends the following statement to the server:
{color:#0000ff}select * from linked_table where primary_key = :b1{color}
It then proceeds to read the entire table.
If I tell Microsoft Access that there is no primary key, the query gets sent as:
{color:#0000ff}select * from linked_table{color}
And the query comes back as soon as the first 100 or so rows are fetched which is quite quickly.
ADDITIONAL NOTES:
1) If the table has a primary key or unique constraint, Microsoft Access automatically assigns that as the primary key.
2) We can stop the behavior in #1 if we wrap a view around it which prevents Access from discovering that information and then it prompts for a primary key definition.
3) If we use the Microsoft ODBC driver, the bind variable is not added no matter what the primary key defintiion is.
We're stumped and are looking for solutions and/or workarounds without having to wrap all of our tables in views to hide the fact that there is a primary key.
Thanks,
Steve

Thanks for the response, Greg.
The specific question I am seeking an answer for (sorry it was not clear on my first message) is this:
Why does the Oracle driver add the bind variable to the query only when the primary key is defined?
The Microsoft ODBC driver does not add the bind variable with or without a primary key defined.
You asked how I traced this statement and what I am doing is launching the query in Access and then using TOAD to view the V$SESSION and V$SQL_TEXT_WITH_NEWLINES views. All I do is change the driver. This is just for a simple browse table (double-click on the table) which should send
select * from table
However, whenever I use the Oracle ODBC driver (with a primary key defined) it sends
select * from table where primary_key = :1
If I remove the primary key on the table definition, the Oracle driver sends
select * from table
What is it about the primary key that could cause that behavior?
I don't think it is the MDAC/Jet level because this is the conversion to the native SQL statement not the Jet version. I know the Oracle driver has to do that part because you have those workaround options like don't add the RULE hint, etc. That's not part of the Jet engine.
Hope that helps. I'm just baffled over this one and wish I knew where to go next.

Slow performance in W2K using Oracle ODBC Driver

Similar Messages

Maybe you are looking for