Connecting to Oracle lite via VB6

Hello
is there a better way to connect to Oracle 10g when using VB6?
this is what I have:
Under references I am using Microsoft DAO 3.6 Object library
I do have a module where I defined the following public variables:
Public wsOracle As DAO.Workspace
Public cnOracle As DAO.Connection
Public strConn As String
and a function to alllow me to connect to the database:
Function ConnectDB()
On Error GoTo Error_DataBaseError
strConn = "ODBC;DSN=MY_DATABASE;UID=user;PWD=passr"
Set wsOracle = DBEngine.CreateWorkspace("", "admin", "admin", dbUseODBC)
wsOracle.DefaultCursorDriver = dbUseClientBatchCursor
Set cnOracle = wsOracle.OpenConnection("", dbDriverNoPrompt, False, strConn)
Error_DataBaseError:
If Err <> 0 Then
Call ErrorCatching("ConnectDB ()")
End If
End Function
It seems to work but I am having issues, two apps are connected to the same Database one is in power builder y the other in VB6 after a certain time of inactivity I get timed out from the VB app and this gets also into the power builder app.
but if one app is open for a long time it seems to work just fine. any ideas why?
I read that I can use the Oracle Lite 40 ODBC Driver
but I can't seem to find a way to do the call from VB6
any ideas?
any enlightenment will be appreciated

Unfortunately, in 2.0 beta, the Infobus Data Form wizard
connection editor only supported the Oracle Thin, OCI7 and OCI8
drivers. For 2.0 production, Oracle Lite and the JDBC-ODBC bridge
will also be supported.
Regards,
JDeveloper Team
Poorna Byri (guest) wrote:
: Hi,
: Can we can connect to Oracle Lite 3.5 from Oracle JDeveloper2.0
: Beta using Infobus Data Form. When I tried to create a file
based
: on "Infobus Based Data Form" wizard it is not displaying Oracle
: Lite 3.5 driver. Can I create a TNS name for Oracle Lite 3.5
: database.
: Any help.
: Thanks.
: Poorna Byri
null

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I am trying to make a connection from JDeveloper 2.0 to Oracle
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I get a connection defined in the connection wizard but I have
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null

Laura,
Can you tell me than what's the use of choosing an Oracle Lite
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: Marko,
: Yes, you can only use the JDBC thin driver when creating an
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is
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in
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has
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: With the JDBC thin driver, everything is included in the
: classes111.zip file.
: Laura
: Marko (guest) wrote:
: : Laura,
: : Great, it works! Well, partly at least. I am now able to use
: the
: : driver in JDBC-applications. It is also possible to use the
: : driver when defining a new Connection with the connection-
: : wizzard.
: : The only remaining problem is the fact that the newly
defined
: : connection can't be chosen, when I start creating an infobus-
: : applet. Can it be that only thin and oci drivers can be used
: for
: : infobus-applets?
: : JDeveloper Team (guest) wrote:
: : : Marko,
: : : If I remember correctly, Oracle Lite 4.0 was not available
at
: : the
: : : time we released JDeveloper 2.0, so it is possible that
the
: : : drivers are not compatible.
: : : You say that JDeveloper needs the 35 jar. Are you getting
an
: : : error when you try to define a connection? Can you tell
me
: : what
: : : that error is? I will try to verify what is happening.
: : : A few things to try:
: : : 1. When you add the Oracle Lite library to your project
: : : properties, make sure it appears before/above any other
JDBC
: : or
: : : EJB libraries. If necessary, select the library in the
list
: : and
: : : drag it up.
: : : 2. When you edit the IDE Classpath, also make sure the
: : pointers
: : : to the Oracle Lite jars come before any of
: : the 'classes111.zip'
: : : files.
: : : Laura
: : : Marko (guest) wrote:
: : : : I have the same problem. Oracle Lite 8i is shipped with
: : : : olite35.jar and olite40.jar. JDeveloper can't use the
: driver
: : in
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: : : described
: : : : below, but JDeveloper needs oljdbc35.dll in the shared
: : library
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: : oljdbc40.dll
: : : : in Oracle Lite 8i 4.0.
: : : : JDev Team (guest) wrote:
: : : : : Stan,
: : : : : This is documented in the Release Notes as follows:
: : : : : 1. Install JDeveloper.
: : : : : 2. Install Oracle Lite 3.6 or higher.
: : : : : 3. Launch JDeveloper.
: : : : : 4. Add a library for Oracle Lite by following these
: steps:
: : : : : a.Choose the menu option Tools | Default Project
: : : : Properties.
: : : : : b.Click the Libraries button at the bottom of the
: : dialog.
: : : : : c.Click the New button on the lower right to add a
new
: : : : : library.
: : : : : d.Name the library Oracle Lite by typing in the
Name
: : : field.
: : : : : e.Add the path to the Oracle Lite driver by typing
in
: : the
: : : : : Class Path field. This should be a jar file called
: : : : : <oracle_home>\lite\classes\olite36.jar, but check
: the
: : : : : documentation for your version of Oracle Lite.
: : : : : f.Click OK to add the Library. JDeveloper analyses
the
: : : : : dependencies for the driver and returns to the
: : : : Default
: : : : : Project Properties dialog.
: : : : : g.Click Add to add Oracle Lite to the default
project
: : : : : properties for all future generated projects.
: : : : Alternatively,
: : : : : you may add the Oracle Lite driver on a
: : : : : project by project basis by selecting Project |
: : Project
: : : : : Properties and adding the newly created library
to
: : the
: : : : : current project.
: : : : : 5. Quit JDeveloper.
: : : : : 6. Add the Oracle Lite jar file to the IDE Classpath
by
: : : : following
: : : : : these steps:
: : : : : a.Open the file <jdev_home>\bin\jdeveloper.ini.
: : : : : b.Under the section [Java_Global], add the path of
the
: : : : Oracle
: : : : : Lite driver to the IDEClassPath. This should be a
: jar
: : : : file
: : : : : called
: : : : : <oracle_home>\lite\classes\olite36.jar, but check
: the
: : : : : documentation for your version of Oracle Lite.
: : : : : 7. Restart JDeveloper.
: : : : : Stan McDaniel (guest) wrote:
: : : : : : I am trying to make a connection from JDeveloper 2.0
to
: : : : Oracle
: : : : : : Lite 8i 4.0.
: : : : : : I get a connection defined in the connection wizard
but
: : I
: : : : have
: : : : : : to use the Sun Jdbc Odbc driver and it does not show
up
: : in
: : : : the
: : : : : : connections dropdown when I go to use it.
: : : : : : Does anyone know how I can get a usable connection?
: : : : : : Stan McDaniel
null

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SQL*Plus: Release 11.2.0.3.0 Production on Fri May 25 15:14:13 2012
Copyright (c) 1982, 2011, Oracle. All rights reserved.
ERROR:
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Interrupt:20 Memory:fdfc0000-fdfe0000
eth0:2 Link encap:Ethernet HWaddr 00:1A:A0:96:A6:B2
inet addr:172.20.0.214 Bcast:172.20.0.255 Mask:255.255.255.0 <---- one of the SCAN ips
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:20 Memory:fdfc0000-fdfe0000
eth1 Link encap:Ethernet HWaddr 90:E2:BA:0F:F9:8F
inet addr:10.0.0.2 Bcast:10.0.0.255 Mask:255.255.255.0 <---- private interconnect
inet6 addr: fe80::92e2:baff:fe0f:f98f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:26461881 errors:4 dropped:0 overruns:0 frame:2
TX packets:33628826 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4053295644 (3.7 GiB) TX bytes:695537051 (663.3 MiB)
on racnode2
eth0 Link encap:Ethernet HWaddr 00:1A:A0:96:A4:5B
inet addr:172.20.0.174 Bcast:172.20.0.255 Mask:255.255.255.0 <--- public IP
inet6 addr: fe80::21a:a0ff:fe96:a45b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3233473 errors:0 dropped:0 overruns:0 frame:0
TX packets:1766459 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:41109717 (39.2 MiB) TX bytes:179509273 (171.1 MiB)
Interrupt:20 Memory:fdfc0000-fdfe0000
eth0:1 Link encap:Ethernet HWaddr 00:1A:A0:96:A4:5B
inet addr:172.20.0.211 Bcast:172.20.0.255 Mask:255.255.255.0 <--- VIP
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:20 Memory:fdfc0000-fdfe0000
eth0:2 Link encap:Ethernet HWaddr 00:1A:A0:96:A4:5B
inet addr:172.20.0.210 Bcast:172.20.0.255 Mask:255.255.255.0 <--- another SCAN IP
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:20 Memory:fdfc0000-fdfe0000
eth0:3 Link encap:Ethernet HWaddr 00:1A:A0:96:A4:5B
inet addr:172.20.0.213 Bcast:172.20.0.255 Mask:255.255.255.0 <--- another SCAN IP
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:20 Memory:fdfc0000-fdfe0000
$ ./lsnrctl status LISTENER_SCAN1
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 25-MAY-2012 15:12:35
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1)))
STATUS of the LISTENER
Alias LISTENER_SCAN1
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 25-MAY-2012 14:28:11
Uptime 0 days 0 hr. 44 min. 23 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /home/oracle/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /home/oracle/app/oracle/diag/tnslsnr/racnode1/listener_scan1/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.20.0.214)(PORT=1521)))
Services Summary...
Service "racdb.development.info" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "racdbXDB.development.info" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
The command completed successfully
Any ideas?

How does SCAN work?
“When a client submits a request, the SCAN listener listening on a SCAN IP address and the SCAN port is contracted on a client’s behalf. Because all services on the cluster are registered with the SCAN listener, the SCAN listener replies with the address of the local listener (Using SCAN the connection is initiated using the SCANIP, but is established using the VIP) on the least-loaded node (Each scan listener keeps updated cluster load statistics) where the service is currently being offered. Finally, the client establishes connection to the service through the listener using VIP on the node where service is offered.All of these actions take place transparently to the client without any explicit configuration required in the client.”
So, to SCAN Works you must aware:
Server (cluster)
-The service must be registered on Local/Scan ListenerI believe I've done this now but see below.
Database (rac)
-You must use remote_listener parameterThe remote listener parameter I have is:
SQL> show parameter remote listener
NAME                    TYPE     VALUE
remote_dependencies_mode     string     TIMESTAMP
remote_listener           string     rac-scan:1521
remote_login_passwordfile     string     EXCLUSIVE
remote_os_authent          boolean     FALSE
remote_os_roles           boolean     FALSE
result_cache_remote_expiration     integer     0
Cient
-Must resolve all SCAN Names and VIP Names (check with nslookup)I'd made a mistake there. My VIP names were not available from DNS.
-Must access port of Listener
Try it:
http://levipereira.wordpress.com/2011/05/03/configuring-client-to-use-scan-11-2-0/
Thanks, that document was useful however I don't think I've got it completely right as yet as I have no listener_scan2.
$ olsnodes -i -s -n
racnode1     1     racnode1-vip     Active
racnode2     2     racnode2-vip     Active
srvctl config vip -n racnode1
VIP exists.:racnode1
VIP exists.: /racnode1-vip/172.20.0.212/255.255.255.0/eth0
srvctl config vip -n racnode2
VIP exists.:racnode2
VIP exists.: /racnode2-vip/172.20.0.211/255.255.255.0/eth0
srvctl config scan
SCAN name: rac-scan.xxx.local, Network: 1/172.20.0.0/255.255.255.0/eth0
SCAN VIP name: scan1, IP: /172.20.0.214/172.20.0.214
SCAN VIP name: scan2, IP: /rac-scan.xxx.local/172.20.0.210
SCAN VIP name: scan3, IP: /172.20.0.213/172.20.0.213
SQL> select INST_ID, NAME, VALUE
2 from gv$parameter
3 where name like '%_listener%';
INST_ID
NAME
VALUE
     1
local_listener
(address=(protocol=tcp)(port=1521)(host=racnode1-vip.xxx.local))
     1
remote_listener
rac-scan:1521
INST_ID
NAME
VALUE
     2
local_listener
(address=(protocol=tcp)(port=1521)(host=racnode1-vip.xxx.local))
     2
remote_listener
INST_ID
NAME
VALUE
rac-scan:1521
racnode1
$ lsnrctl service listener_scan1
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 28-MAY-2012 13:36:10
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1)))
Services Summary...
Service "racdb.development.info" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
REMOTE SERVER
(address=(protocol=tcp)(port=1521)(host=racnode1-vip.xxx.local))
Instance "racdb2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
REMOTE SERVER
(address=(protocol=tcp)(port=1521)(host=racnode2-vip.xxx.local))
Service "racdbXDB.development.info" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: racnode1.xxx.local, pid: 3651>
(ADDRESS=(PROTOCOL=tcp)(HOST=racnode1.xxx.local)(PORT=62553))
Instance "racdb2", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: racnode2.xxx.local, pid: 6501>
(ADDRESS=(PROTOCOL=tcp)(HOST=racnode2.xxx.local)(PORT=10619))
The command completed successfully
$ lsnrctl service
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 28-MAY-2012 13:38:02
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "racdb.development.info" has 1 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "racdbXDB.development.info" has 1 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: racnode1.xxx.local, pid: 3651>
(ADDRESS=(PROTOCOL=tcp)(HOST=racnode1.xxx.local)(PORT=62553))
The command completed successfully
racnode2
lsnrctl service listener_scan2
none of listener_scan1, 2 or 3 say anything other than TNS-01101: Could not find service name listener_scanN
lsnrctl service
$ lsnrctl service
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 28-MAY-2012 13:19:50
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))
Services Summary...
Service "+ASM" has 1 instance(s).
Instance "+ASM2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "racdb.development.info" has 1 instance(s).
Instance "racdb2", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:14 refused:0 state:ready
LOCAL SERVER
Service "racdbXDB.development.info" has 1 instance(s).
Instance "racdb2", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: racnode2.xxx.local, pid: 6501>
(ADDRESS=(PROTOCOL=tcp)(HOST=racnode2.xxx.local)(PORT=10619))
The command completed successfully
UPDATE:
$ srvctl config scan_listener
SCAN Listener LISTENER_SCAN1 exists. Port: TCP:1521
There is a period of time when I shutdown one node where I cannot connect and get "ORA-12514: TNS:listener does not currently know of service requested in connect descriptor"
Edited by: MartinJEvans on May 28, 2012 2:02 PM

Connecting to Oracle XE via regular 10g client - ORA-12514

I have had the 10g client installled on my computer for a while, for developing against our company Oracle databases. I have now installed the XE database locally on my computer so I can do some local development - according to the information I've been able to find the two should live side-by-side without problem.
I can still connect to our company databases just fine, but I can't get a connection to the local XE database at all.
I've added this line to tnsnames.ora:
XE = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = XE)))
The error I'm getting connecting is:
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
Thanks for any help!

Hi,
I did mean duplicates even between different tnsnames.ora files.
As I understand, if you XE works, you should not need do anything for that tnsnames.ora.
Just find how entry should be for client.
BTW, what tool you will use for XE? Do you need client?
E.g. if you use SQL Developer, you do not need client or set anything to tnsnames.ora
Regards,
Jari
Edited by: jarola on Jan 18, 2011 2:30 PM
BTW, it might good to search Instant Client forums if you find help there.
If you do not find answer, then it might good idea post question there.
At least for me this is more client question than XE.
Instant Client
But as I understand it should not be any problem use 10g client for XE.
I just have never done that =)

ODBC connections to Oracle 9i Lite

i'm currently using oracle 9i Lite 5.0.2 database and Palm OS 5.1. can any body send me a sample code in JAVAwith which i can connect to Oracle Lite database in my palm from a PALM Application using ODBC.

I am running the OBIEE software on Windows XP Professional on a laptop. An Oracle 10.2.0.1 EE database also resides on this machine.
My TNSNAMES.ora file is located in one of my Oracle Homes but I have a system environment variable set for TNS_ADMIN. I am using the default listener installed with the preconfigured database, and I can connect to the database ok from the PC using SQL*Plus, TOAD etc. I have also tried connecting to the ODBC data source set up for this 10g db from within Excel with no problems.
The System DSN entry called ORCLSH uses the driver 'Oracle in OraDB 10g_home1'. I have tried the ODBC driver with both a username entered and not. The TNS entry alias ORCLSH is used, which matches my TNSNAMES.ora file entry in the location designated by TNS_ADMIN. My db service name is ORCL. The parameters in the data connections are left are their defaults, i.e., enable result sets, enable query timeout, enable thread safety - all checked.
The connection pool has been named ORCLSH too. I'm using Call interface ODBC 3.5, max connections 10, data source name ORCLSH. Shared login - checked, enable connection poolng - checked, use multithreaded connections - checked, execute queries asynchronously - checked, parameters supplied - checked (defaults).
The writeback tab has been left alone (prefix TT, bulk insert buffer size 32, trx boundary 10).
What other parameter details do you need to know, other that what details I have previously provided?
Cheers,
John

Connecting to Oracle lite via VB6

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