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?

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http://forum.java.sun.com/thread.jsp?forum=48&thread=187964&start=0&range=15#608968
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Hello,
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How to install Oracle ODBC driver...?

TOM,
Presently, I have oracle client version. But there no Oracle ODBC driver in my PC. But, I want to install only Oracle ODBC driver in my PC for ODBC Connectivity purpose.
How to install & where can get the source?

I found out the real answer!!!
On another thread there was a link to the client 10g installation. I download that 480Meg monster. Unzipped the package and launced the setup.exe.
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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)...
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{color:#0000ff}select * from linked_table where primary_key = :b1{color}
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If I tell Microsoft Access that there is no primary key, the query gets sent as:
{color:#0000ff}select * from linked_table{color}
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ADDITIONAL NOTES:
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The specific question I am seeking an answer for (sorry it was not clear on my first message) is this:
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Hi Justin
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I tried what you mentioned and I could connect myself via SQL*Plus without passing a password and a login, Extern authentification seems to work and my user seems to be right configurated.
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I recently had to reinstall my operating system (Windows XP Pro 32 bit) and applications, which included Crystal Reports. CR was originally setup to access our companies database tables. I also had and ODBC connection setup for CR.
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if u r running the CR in the current user then you can make the ODBC
in user dsn or System dsn
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then user name eg; scott
then password as scott;
thne your odbc is created...
you can work with CR with this odbc
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do it
best of luck..

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);
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// 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';
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          // more than one message box may be reqd. as err text has fixed
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          strcpy(szDispBuffer, szBuffer);
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          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);
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               if (iSize && (iSize+strlen(szBuffer)+1) >= MAXDISPLAYSIZE)
               break;
               if (iSize)
               strcat(szDispBuffer, "\n");
               strcat(szDispBuffer, szBuffer);
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          if (nResult == SQL_SUCCESS_WITH_INFO)
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               MB_OK | MB_ICONINFORMATION);
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               MessageBox(hWnd, szDispBuffer, (fFirstRun? SQLERRMSGTITLE : SQLERRCNTDTITLE),
               MB_OK | MB_ICONEXCLAMATION);
          if (fFirstRun)
               fFirstRun = FALSE;
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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);
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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);
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               for (dtsize=0, bufp = clobdata;
                    dtsize < clobdatalen;
                    dtsize += chunksize, bufp += chunksize)
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               if (dtsize+chunksize < clobdatalen)
                    len = chunksize;
                    rc = SQLPutData(stmtHnd, bufp, len*sizeof(SQLCHAR));
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                    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
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          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,
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Hi Everybody,
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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.
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Best Regards,
Manuel

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Hi,
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Best Regards,
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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

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Oracle version : 8.1.7
Platform : Win2K
Oracle ODBC Driver version : 8.0.1.7.5.0.0
Hi,
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Did you ever get an answer on this issue?
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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.
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How can I use the ODBC driver to connect to the databases using services defined in the second home?
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Hi,
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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.'
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ASP pages and Oracle ODBC Driver

I have a number of ASP pages that need to be updated to connect to Oracle using the ORACLE ODBC driver. Currently, these pages connect using the Microsoft ODBC driver for Oracle. I do not know of all the details yet as I havent seen the pages or network for which they reside on and I havent been supplied with details on version information. I would assume I am working with recent versions of all software.
What Im curious about is if anyone has done this sort of driver change before and if you have any suggestions on how I would go about doing this, or if there are things that I need to be aware of that arent evident at first glance.
Again, I am switching from the odbc driver provided by Microsoft to a version of the odbc driver provided by Oracle.
Thanks for any and all information.

I'll assume that there is some reason that necessitates switching drivers. If there's not going to be a benefit, I'd suggest not changing.
That said, changing drivers should be relatively painless. If your ASP makes database connections using DSN's, simply go to the ODBC Data Source Administrator, rename the old Microsoft DSN, and create a new DSN using the Oracle driver with the name your ASP is looking for. If your ASP specifies the ODBC driver in its connect string, you'll have to modify all the ASP connect strings to use the Oracle driver. If all goes well, your ASP will now be up & running using the Oracle driver.
As we all know, however, reality and theory are often at odds with each other. While your ASP should be connecting to the database correctly when you make these changes, please do some thorough testing to verify that everything works like you expect. The ODBC specification permits drivers to have a variety of behaviors in certain conditions. Applications written with one ODBC driver often end up relying on one of these behaviors, and may break when the ODBC driver changes.
Justin Cave
ODBC Development

How to select active Oracle ODBC Driver programmatically?

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