Multiple SQL_HANDLE_DBC handles do not work on Linux

Question

Hello,
I am seeing the following error from the SQL Server Driver For Linux when I attempt to execute a query on a SECOND connection within my application:
SQLSTATE: IM001
Native Error Code: 0
Message: [unixODBC][Driver Manager]Driver does not support this function
I have compiled/run the test case I have on Windows and the code executes without issue.
Here is my test case:
// SQLGetData.cpp
// g++ -M64 -I$ODBC/include -L$ODBC/lib -g -lodbc sqlgetdata.cpp
// cl sqlgetdata2.cpp odbc32.lib
// CREATE TABLE tstDFRBLB(col1 varbinary(max))
#if defined(_WIN32)
#include <windows.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <sql.h>
#include <sqlext.h>
void checkError ( SQLRETURN rc, const char *cstr )
if( rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO ) {
return ;
} else if( rc == SQL_INVALID_HANDLE ) {
fprintf( stderr, "Error: invalid handle: %s.\n", cstr ) ;
} else {
fprintf( stderr, "Unknown Error occured in %s: code %d.\n", cstr, rc ) ;
void checkStmtError( SQLRETURN rc, SQLHSTMT stmth )
if(rc != SQL_SUCCESS) {
int i = 1 ;
SQLSMALLINT length;
SQLINTEGER sqlcode;
SQLCHAR *sqlstate = (SQLCHAR *) malloc(100 * sizeof(SQLCHAR));
SQLCHAR *message = (SQLCHAR *) malloc(1000 * sizeof(SQLCHAR));
while ( SQLGetDiagRec( SQL_HANDLE_STMT, stmth, i, sqlstate, &sqlcode,
message, 1000, &length ) == SQL_SUCCESS ) {
printf( "\nSQLSTATE: %s\n", sqlstate ) ;
printf( "Native Error Code: %ld\n", sqlcode ) ;
printf( "Message: %s\n", message ) ;
i++ ;
delete sqlstate;
delete message;
int main( int ac, char **av )
SQLHENV envh ;
SQLHDBC dbch ;
SQLHDBC dbch2 ;
SQLRETURN rc ;
SQLHSTMT stmth ;
const char *select_stmt = "SELECT * FROM tstDFRBLB" ;
/* Allocate a environment handl */
rc = SQLAllocHandle( SQL_HANDLE_ENV, // Handle type
SQL_NULL_HANDLE,
&envh // SQLHENV handle (environment)
checkError( rc, "SQLAllocHandle - SQL_HANDLE_ENV" ) ;
/* Set environment attributes */
rc = SQLSetEnvAttr( envh, // Environment handle
SQL_ATTR_ODBC_VERSION, // Attribute to set
(SQLPOINTER) SQL_OV_ODBC3,// New attribute
SQL_NTS // SQL_NTS (null terminated)
checkError( rc, "SQLSetEnvAttr" ) ;
/* Allocate a database connection handle */
rc = SQLAllocHandle( SQL_HANDLE_DBC, // Handle Type
envh, // Where to attatch the new handle
&dbch // Pointer to new handle
checkError( rc, "SQLAllocHandle - SQL_HANDLE_DBC" ) ;
/* Establish a connection */
SQLCHAR outStr[1024];
SQLSMALLINT outSize;
rc = SQLDriverConnect(dbch, NULL,
#if defined(_WIN32)
(SQLCHAR*)"DSN=MSSQL_2012_NC_64;UID=*****;PWD=*****;DATABASE=qe1;", 57,
#else
(SQLCHAR*)"DSN=mssql-2012-md_64;UID=*****;PWD=*****;DATABASE=qe1;", 57,
#endif
outStr, sizeof(outStr), &outSize, SQL_DRIVER_NOPROMPT);
/* Allocate a second database connection handle */
rc = SQLAllocHandle( SQL_HANDLE_DBC, // Handle Type
envh, // Where to attatch the new handle
&dbch2 // Pointer to new handle
checkError( rc, "SQLAllocHandle - SQL_HANDLE_DBC" ) ;
rc = SQLSetConnectAttr(dbch2,
SQL_ODBC_CURSORS,
(SQLPOINTER)SQL_CUR_USE_DRIVER,
(SQLINTEGER)NULL); // this value is ignored
checkError( rc, "SQLSetConnectAttr - SQL_ODBC_CURSORS" ) ;
rc = SQLDriverConnect(dbch2, NULL,
#if defined(_WIN32)
(SQLCHAR*)"DSN=MSSQL_2012_NC_64;UID=*****;PWD=*****;DATABASE=qe1;", 57,
#else
(SQLCHAR*)"DSN=mssql-2012-md_64;UID=*****;PWD=*****;DATABASE=qe1;", 57,
#endif
outStr, sizeof(outStr), &outSize, SQL_DRIVER_NOPROMPT);
rc = SQLAllocHandle( SQL_HANDLE_STMT, dbch2, &stmth ) ;
checkError( rc, "SQLAllocHandle - SQL_HANDLE_STMT" ) ;
** Read the value back
rc = SQLExecDirect( stmth, (SQLCHAR*)select_stmt, SQL_NTS ) ;
checkStmtError( rc, stmth );
char outWData[168000];
SQLLEN outInd = 0;
while ( SQLFetch( stmth ) == SQL_SUCCESS )
rc = SQLGetData( stmth, 1, SQL_C_BINARY, outWData, sizeof(outWData), &outInd );
checkStmtError( rc, stmth );
if(outInd == SQL_NULL_DATA) {
printf("Data Returned: NULL\n");
else {
printf("Data Returned Length %d\n", outInd);
rc = SQLMoreResults(stmth);
checkStmtError( rc, stmth );
/* Disconnect from the database */
rc = SQLDisconnect( dbch2 ) ;
checkError( rc, "SQLDisconnect" ) ;
/* Free connection and environment handles */
rc = SQLFreeHandle( SQL_HANDLE_DBC, dbch2 ) ;
checkError( rc, "SQLDisconnect" ) ;
/* Disconnect from the database */
rc = SQLDisconnect( dbch ) ;
checkError( rc, "SQLDisconnect" ) ;
/* Free connection and environment handles */
rc = SQLFreeHandle( SQL_HANDLE_DBC, dbch ) ;
checkError( rc, "SQLDisconnect" ) ;
SQLFreeHandle( SQL_HANDLE_ENV, envh ) ;
checkError( rc, "SQLDisconnect" ) ;
return EXIT_SUCCESS ;
Thank you for any help/advice.
Dave
David Ritter

Answer 1

Hi David,
According to your description, the code running smoothly in windows, and getting this problem when using SQL Server driver for linux.
So, what's the version of your SQL Server driver for linux?
As per the error message, the function is not supported, so could you please check the configuration of the driver or there are some limitation in the driver you used?
Please follow these links to have a check:
The ODBC Driver 11 for SQL Server on 64-bit Red Hat Enterprise Linux 5 and 64-bit Red Hat Enterprise Linux 6.
You can download the ODBC driver for Red Hat at
Microsoft ODBC Driver for SQL Server.
The ODBC Driver 11 for SQL Server on 64-bit SUSE Linux Enterprise 11 Service Pack 2. This driver is currently available as a Community Technology Preview (CTP).
You can download the ODBC driver for SUSE Linux at
Microsoft ODBC Driver 11 for SQL Server on SUSE Linux.
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Iric Wen
TechNet Community Support