Dg4odbc, unixODBC, freeTDS - connection problems to MS SQL 2008

Question

I am trying to set up a database link between my 64bit Oracle 11g running on CentOS 6.2 and my MS SQL 2008 server running on MS Windows server 2003. I have installed the following -
freeTDS - version 0.91 (64 bit)
unixODBC - version 2.3.1 (64 bit)
I have successfully configured ODBC and freeTDS so that I can connect using isql and query my MSSQL database. The problem I am having is connecting Oracle to MSSQL, I am sure it is a simple configuration error but I have been going round in circles with this and hope someone can help!
freetds.conf
[global]
timeout = 10
connect timeout = 10
text size = 64512
[CERM]
host = 192.168.xxx.xxx
port = 1101
tds version = 7.2
instance = SSLSQLDB
dump file = /tmp/dump.log
odbc.ini
[ODBC Data Sources]
CERM=TDS connection
[CERM]
Servername = CERM
Description = TDS connection
Driver = /usr/local/lib/libtdsodbc.so
UsageCount = 1
FileUsage = 1
[ODBC]
Trace=255
odbcinst.ini
[TDS]
Description = FreeTDS driver for MS SQL
Driver = /usr/local/lib/libtdsodbc.so
Setup = /usr/lib64/libtdsS.so
Trace = Yes
TraceFile = /tmp/freetd.log
FileUsage = 1
[FreeTDS]
Description = FreeTDS driver for MS SQL
Driver = /usr/local/lib/libtdsodbc.so
Setup = /usr/lib64/libtdsS.so
Trace = Yes
TraceFile = /tmp/freetd.log
FileUsage = 1
(Because I have put the actual path to the driver in the odbc.ini file I don;t believe the odbcinst.ini file is actually used)
inithscerm.ora
# This is a sample agent init file containing the HS parameters that
# are needed for an ODBC Agent.
# HS init parameters
HS_FDS_CONNECT_INFO=CERM
HS_FDS_TRACE_LEVEL=255
#HS_FDS_TRACE_FILE_NAME = /tmp/hsodbcsql.trc
HS_FDS_SHAREABLE_NAME=/usr/local/lib/libodbc.so
HS_FDS_SUPPORT_STATISTICS=FALSE
set ODBCINI=/usr/local/etc/odbc.ini
(my odbc.ini file is located in /usr/local/etc)
listener.ora
# listener.ora Network Configuration File: /usr/oracle/product/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = ssl-oracle.domain)(PORT = 1521))
ADR_BASE_LISTENER = /usr/oracle
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC=
(SID_NAME=hscerm)
(ORACLE_HOME=/usr/oracle/product)
(PROGRAM=dg4odbc)
(ENVS=LD_LIBRARY_PATH = /usr/local/lib:$ORACLE_HOME/lib)
(SID_DESC=
(SID_NAME=PROD)
(ORACLE_HOME=/usr/oracle/product)
tnsnames.ora
# tnsnames.ora Network Configuration File: /usr/oracle/product/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
PROD =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ssl-oracle.domain)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PROD.DOMAIN)
hscerm=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=ssl-oracle.domain)(PORT=1521))
(CONNECT_DATA= (SID=hscerm))
(HS=OK)
right - I can tnsping my hscerm instance and that returns ok so I'm fairly sure the configuration is fine for both tnsnames.ora and listener.ora. I can isql connect to the ODBC defined name for the the MSSQL database. but when I create a database link in Oracle and then test it I get the following trace output :-
[ODBC][14030][1339512618.356535][SQLSetConnectAttrW.c][332]
Entry:
Connection = 0x2054640
Attribute = SQL_ATTR_AUTOCOMMIT
Value = (nil)
StrLen = -5
[ODBC][14030][1339512618.356616][SQLSetConnectAttrW.c][616]
Exit:[SQL_SUCCESS]
[ODBC][14030][1339512618.356984][SQLDriverConnectW.c][290]
Entry:
Connection = 0x2054640
Window Hdl = (nil)
Str In = [DNCR;I=APDagj20][length = 30]
Str Out = 0x2053408
Str Out Max = 1024
Str Out Ptr = 0x7fff6d305770
Completion = 0
[ODBC][14030][1339512618.357030][SQLDriverConnectW.c][500]Error: IM002
[ODBC][14030][1339512618.357115][SQLGetDiagRecW.c][508]
Entry:
Connection = 0x2054640
Rec Number = 1
SQLState = 0x7fff6d3053d0
Native = 0x7fff6d3051c4
Message Text = 0x7fff6d3051d0
Buffer Length = 510
Text Len Ptr = 0x7fff6d305420
[ODBC][14030][1339512618.357153][SQLGetDiagRecW.c][550]
Exit:[SQL_SUCCESS]
SQLState = IM002
Native = 0x7fff6d3051c4 -> 0
Message Text = [[unixODBC][Driver Manager]Data source name not found, and no default driver specified]
[ODBC][14030][1339512618.357197][SQLGetDiagRecW.c][508]
Entry:
Connection = 0x2054640
Rec Number = 2
SQLState = 0x7fff6d3053d0
Native = 0x7fff6d3051c4
Message Text = 0x7fff6d3051d0
Buffer Length = 510
Text Len Ptr = 0x7fff6d305420
[ODBC][14030][1339512618.357228][SQLGetDiagRecW.c][550]
Exit:[SQL_NO_DATA]
[ODBC][14030][1339512618.357291][SQLDisconnect.c][208]
Entry:
Connection = 0x2054640
[ODBC][14030][1339512618.357321][SQLDisconnect.c][237]Error: 08003
[ODBC][14030][1339512618.357387][SQLFreeHandle.c][284]
Entry:
Handle Type = 2
Input Handle = 0x2054640
Now I can clearly see the error "Data source name not found, and no default driver specified" which according to all the documentation means that the entry HS_FDS_CONNECT_INFO=CERM does not match the entry in my odbc.ini file ([CERM]) but for the life of me I can;t see why they don;t match ??
Any help greatly received.

Answer 1

Yeah I verified with isql but I have changed the odbc.ini file as you suggested -
[root@ssl-oracle ~]# more /usr/local/etc/odbc.ini
[ODBC Data Sources]
CERM=TDS connection
[CERM]
Server = 192.168.xxx.xxx
Driver = /usr/local/lib/libtdsodbc.so
Database = sqlb00
Port = 1101
TDS_Version = 8.0
QuotedId = YES
[ODBC]
Trace=255
[root@ssl-oracle admin]# more inithscerm.ora
# This is a sample agent init file containing the HS parameters that
# are needed for an ODBC Agent.
# HS init parameters
HS_FDS_CONNECT_INFO=CERM
HS_FDS_TRACE_LEVEL=255
#HS_FDS_TRACE_FILE_NAME = /tmp/hsodbcsql.trc
HS_FDS_SHAREABLE_NAME=/usr/local/lib/libodbc.so
HS_FDS_SUPPORT_STATISTICS=FALSE
HS_LANGUAGE=american_america.we8mswin1252
HS_NLS_NCHAR=UCS2
set ODBCINI=/usr/local/etc/odbc.ini
[root@ssl-oracle admin]# osql -S CERM -U sa -P supersecretpassword
checking shared odbc libraries linked to isql for default directories...
trying /tmp/sql ... no
trying /tmp/sql ... no
trying /usr/loc ... no
trying /tmp/sql.log ... no
trying /home ... no
trying /.odbc.ini ... no
trying /usr/local/etc ... OK
checking odbc.ini files
cannot read "/root/.odbc.ini"
reading /usr/local/etc/odbc.ini
[CERM] found in /usr/local/etc/odbc.ini
found this section:
[CERM]
Server = 192.168.xxx.xxx
Driver = /usr/local/lib/libtdsodbc.so
Database = sqlb00
Port = 1101
TDS_Version = 8.0
QuotedId = YES
looking for driver for DSN [CERM] in /usr/local/etc/odbc.ini
found driver line: " Driver = /usr/local/lib/libtdsodbc.so"
driver "/usr/local/lib/libtdsodbc.so" found for [CERM] in odbc.ini
found driver named "/usr/local/lib/libtdsodbc.so"
/usr/local/lib/libtdsodbc.so is an executable file
"Server" found, not using freetds.conf
Server is "192.168.xxx.xxx"
looking up hostname for ip address 192.168.xxx.xxx
Configuration looks OK. Connection details:
DSN: CERM
odbc.ini: /usr/local/etc/odbc.ini
Driver: /usr/local/lib/libtdsodbc.so
Server hostname: ssl-database.domain
Address: 192.168.xxx.xxx
Attempting connection as sa ...
+ isql CERM sa supersecretpassword -v
| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
SQL>
sql.log
[ODBC][31473][1339581606.488571][SQLSetConnectAttr.c][396]
Entry:
Connection = 0x26c2a30
Attribute = SQL_ATTR_AUTOCOMMIT
Value = (nil)
StrLen = -5
[ODBC][31473][1339581606.488638][SQLSetConnectAttr.c][681]
Exit:[SQL_SUCCESS]
[ODBC][31473][1339581606.488924][SQLDriverConnect.c][726]
Entry:
Connection = 0x26c2a30
Window Hdl = (nil)
Str In = [DSN=CERM;UID=SA;PWD=**********][length = 30]
Str Out = 0x26c4b18
Str Out Max = 1024
Str Out Ptr = 0x7fff12846560
Completion = 0
UNICODE Using encoding ASCII 'ISO8859-1' and UNICODE 'UCS-2LE'
DIAG [01000] [FreeTDS][SQL Server]Unknown host machine name.
DIAG [08001] [FreeTDS][SQL Server]Unable to connect to data source
[ODBC][31473][1339581606.491276][SQLDriverConnect.c][1353]
Exit:[SQL_ERROR]
[ODBC][31473][1339581606.491358][SQLGetDiagRec.c][680]
Entry:
Connection = 0x26c2a30
Rec Number = 1
SQLState = 0x7fff128461c0
Native = 0x7fff12845fb4
Message Text = 0x7fff12845fc0
Buffer Length = 510
Text Len Ptr = 0x7fff12846210
[ODBC][31473][1339581606.491395][SQLGetDiagRec.c][717]
Exit:[SQL_SUCCESS]
SQLState = 08001
Native = 0x7fff12845fb4 -> 0
Message Text = [[unixODBC][FreeTDS][SQL Server]Unable to connect to data source]
[ODBC][31473][1339581606.491442][SQLGetDiagRec.c][680]
Entry:
Connection = 0x26c2a30
Rec Number = 2
SQLState = 0x7fff128461c0
Native = 0x7fff12845fb4
Message Text = 0x7fff12845fc0
Buffer Length = 510
Text Len Ptr = 0x7fff12846210
[ODBC][31473][1339581606.491493][SQLGetDiagRec.c][717]
Exit:[SQL_SUCCESS]
SQLState = 01000
Native = 0x7fff12845fb4 -> 20013
Message Text = [[unixODBC][FreeTDS][SQL Server]Unknown host machine name.]
[ODBC][31473][1339581606.491528][SQLGetDiagRec.c][680]
Entry:
Connection = 0x26c2a30
Rec Number = 3
SQLState = 0x7fff128461c0
Native = 0x7fff12845fb4
Message Text = 0x7fff12845fc0
Buffer Length = 510
Text Len Ptr = 0x7fff12846210
[ODBC][31473][1339581606.491558][SQLGetDiagRec.c][717]
Exit:[SQL_NO_DATA]
[ODBC][31473][1339581606.491623][SQLDisconnect.c][208]
Entry:
Connection = 0x26c2a30
[ODBC][31473][1339581606.491652][SQLDisconnect.c][237]Error: 08003
[ODBC][31473][1339581606.491719][SQLFreeHandle.c][284]
Entry:
Handle Type = 2
Input Handle = 0x26c2a30
[ODBC][31473][1339581606.491750][SQLFreeHandle.c][333]
Exit:[SQL_SUCCESS]
[ODBC][31473][1339581606.493083][SQLFreeHandle.c][219]
Entry:
Handle Type = 1
Input Handle = 0x26abfe0
I can also ping both the hostname and ip address of the MSSQL server.