List item
What is the best way to get rid of tnsnames.ora file on each client
pc ?
Can we use Oracle "transparent gateway" - which uses ODBC drivers to
eliminate "tnsname.ora" file alto gather --to facilitate "oracle to
oracle" connections?
We know one can use Oracle "transparent gateway" to connect to
heterogeneous databases connection e.g., DB2, SQL Server. But can
we use it for Oracle to Oracle?
Any suggestions as to how to get rid of tnsnames.ora?
You can do that when you provide a name server which resolves the TNS alias for you.
With current Oracle you can use:
local naming naming method (which requires an tnsnames.ora file)
directory naming naming method (e.g. with an LDAP Server)
easy connect naming method
CDS external naming method
Network Information Service (NIS) external naming method
Check Oracle documentation Configuring Naming Methods, resp. NAMES.DIRECTORY_PATH to get more information.
Thank you very much for your quick response. My problem is that we have more than 20 Oracle databases and every time when someone gets a new PC or new database is created - that TNSNAmes file needs to be updated, We still have a plenty of legacy client server (two-tier - fat client applications. Your suggestion that we can use Oracle internet directory (OID) in conjunction with Microsft LDAP. Correct? Can we use Microsoft LDAP only without OID? this way we can we get rid of client based Tnsname? correct?
Related
On my Infa server PC, in Informatica Administration I created a repository service giving Oracle Database information. Once in Informatica I connect to this repository and there I want to create a mapping importing a table from a remote sql server pc (on my home network domain) and then create a workflow to put the data into an oracle target table.
Using ODBC admin console I created and tested the connection and I am also able to telnet the linked sql server and port.
Within informatica I created a relational connection for sql server and when I run the workflow I get the error reason (14007) failed to create and inituiate OLE DB instance and datatabase driven error, failed to connect to database using user I use in SSMS for windows authentication and connection string(). I would like to know, first of of all, if I am doing something wrong, willing to connect me to a repository with oracle database information and then use a sql server table on remote pc. Do I have to create another repository for Sql server and there use sql server tables or I can mix them? secondly I would like to know how to create a relational connection object in informatica for my linked sql server so that it will be the same of relatonal connection created with ODBC admin consolle. Last but not least I would like to understand why gives an error out saying I left connection string empty, when I cannot see a place where I can put it by creating the relational connection object
I might not be able to solve the problem completely, but here's few remarks that might be helpful:
PowerCenter Repository database is where PowerCenter will store all the metadata about the processes you create. It may be Oracle - that's perfectly fine. And as it is not releated to your data sources or targets, you do not need to create another one for different sources/targets. One is enough for all ot them.
Using PowerCenter Workflow Manager create the appropriate connections to all the systems you need. Here you create the connections that indicate ODBC/other connections that will be used by Integration Service to actually connect to your data sources and targets, hence
Make sure the ODBC / other data sources are specified on Intergration Service. It is the IS that will run the process, connect to systems specified in the process with the defined connections.
When you build the mappings, you create them in a client app (Mapping Designer) and you can connect to DB engines to create source and target definitions. Mark, that in such case you use the connection (eg. ODBC data source) defined on the client. Once you will try to actually run the workflow with the given mapping, it is executed on IS (mentioned above) where appropriate connections need to be defined - and that's completely separate.
When editing a session in a workflow, for each source and target you need to pick a connection defined in Informatica Repository, created as described in point 2 above (or use a variable to indicate one - but that's another story)
So the error you mention seems to be related to connection created in Workflow Manager - it probably does not specify the connection string that should refer the data source defined on IS.
I am trying to export schema using data pump on Oracle Cloud Autonomous database.
I am using cloud shell to export schema.
When I tried to do the final step:
expdp admin/password#DB_HIGH schemas=SCHEMA_NAME directory=data_pump_dir dumpfile=exp%U.dmp filesize=1G logfile=expot.log
I got
UDE-12154: operation generated ORACLE error 12154 ORA-12154:
TNS:could not resolve the connect identifier specified
Do I need Oracle instant client to do export?
The Oracle client code uses one of three ways to look up connect data:
A flat file named tnsnames.ora
Oracle Names service
LDAP
When the complete ORA-12154 error appears with the text line, your program has found a working Oracle client install. However, the specified Oracle service is not listed in tnsnames.ora, Oracle Names or LDAP.
The first step in the troubleshooting process is to determine which name resolution method is deployed at your site. Most sites use tnsnames.ora, but enough use Oracle Names and LDAP, so it’s best to confirm this information.
If you are not the database administrator, get in touch with the people managing your Oracle systems and find out which method you should be using. They may be able to guide you in fixing the problem in accordance with your site’s standards.
The client code decides which mechanism to use based on the file sqlnet.ora. This file and tnsnames can usually both be found in the Oracle install directory (“ORACLE_HOME”), under network/admin/. This location may be overridden with the environment variable TNS_ADMIN.
If the sqlnet.ora file does not exist or does not specify a resolution method, then Oracle Net uses tnsnames.ora.
Example locations of Oracle networking files include:
Windows
ORANTNET80ADMIN
ORACLEORA81NETWORKADMIN
ORAWIN95NETWORKADMIN
ORAWINNETWORKADMIN
UNIX / Linux
$ORACLE_HOME/network/admin/
/etc/
/var/opt/oracle/
If you fix the naming issues, but you still see the ORA-12154 error, check the Oracle service to confirm that it’s available for connections. A power outage, server failure, or network connectivity issue will make this resource inaccessible. It’s also possible that scheduled maintenance or repairs of an unrelated Oracle issue may take that resource temporarily offline.
Thanks
I have two databases that have tables with identical schema. I want to compare the two tables. I learned that cross DB queries need a Database Link.
I use SQL developer and here are the properties of the connection that works
Connection Name: MyConn
UserName:SomeUser
password:SomePassword
Connection Type: Basic
Role: default
Host Name: 12.12.12.12
port:2521
SID: xe
I tired this command to create Database link
CREATE DATABASE LINK MyDBLink
CONNECT TO SomeUser
IDENTIFIED BY "SomePassword"
USING '(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=12.12.12.12)(PORT=2521))
(CONNECT_DATA=(SID=xe)))';
The command creates a link but when I try to test the link, the connection does not work. The connection times out in 60s.
Am I missing something ?
The Database-Link is between the two databases and not "outgoing" from your local sqldeveloper/client.
So even if you can reach the remote database from your local client, the remote database-server where you created the link might (and in this case indeed does) not reach the target of the database link.
The database link itself is created no matter if the remote database is reachable, or the credentials are incorrect, etc.
If you have the possibility you should directly log on the database server of the database where you created the link and check the network connection to the database server you want to reach from there. Using telnet might help you.
The best solution is to look at the network or operating system and open a path between the two servers, and then the database link should work. If that's not possible, you can use your desktop PC as a proxy.
The official way to route around network issues is to use Oracle Connection Manager. But in my experience that program is a bit hard to configure.
Another option is to create a database on your desktop, and create two database links to each server. If this desktop database is only used for linking to others, then the free Express Edition should be good enough. If you go down this route, be careful of performance problems when involving 3 databases. You'll probably want to compare hashes instead of actual data, to avoid network problems.
I am new to Oracle database in general, but I'm attempting to get Oracle's SQL Developer running on a workstation that has pre-configured System DSNs created for an OracleRDB database. I've confirmed the ODBC connections are working because I can use MS Access to connect and link to the tables. The "test" options within ODBC also succeed. Now I am trying to get a similar connection created using SQL Developer so I can see the column types and write queries in a more useful editor.
Here's what I have available when examining the ODBC connection properties:
Now I'm trying to create a duplicate connection in SQL Developer, but I'm at a loss for why things don't work. I first tried using the default SQL Developer installation, but couldn't get things working. Then I discovered there's an OracleRDB extension available, so I installed that, but I keep getting this error when attempting to use similar values:
As I stated, these ODBC connections were pre-configured on the workstation I'm using, so I don't know anything more than what is provided by the Oracle ODBC driver window.
Is there something obvious I'm not seeing or doing to replicate this connection in SQL Developer? Or perhaps something else I can do to debug this to learn more?
UPDATE
On the advice of one answer I'm trying to make the connection with JDBC, but having a hard time understanding what I'm doing wrong. Here's another screenshot with the connection parameters I have available, but with the server and database names changed:
With these values (the port came from my tnsnames.ora file), if I try to make a JDBC connection I keep getting the following error from SQL Developer:
One final attempt I did was to use the proper values in the Oracle RDB tab, and when I use them and click 'test' the Testing Connection dialog just spins and never seems to return:
So I apologize for the long post here, but I'm struggling because there's just something I am really not understanding about how this all works. I appreciate everyone who took the time to read this question.
Oracle SQL Developer is a Java Application. You'll need to get the JDBC Driver for RDB.
Once you have that, in the SQL Developer preferences, find the Third Party JDBC section, and then use that to add an entry and point to the JAR for what you just installed.
Step by step instructions here.
Working connection string for RDB Thin Driver:
RDB_DB_CONN_STR = "jdbc:rdbThin://node.myplace.com:1707/";
where node.myplace.com is the name of the OpenVMS node hosting the RDB Thin Driver, 1707 is the port number assigned to the RDB Thin Driver.
We have a requirement to make our products work on Oracle as well as SQL Server (around which they were originally built). Unfortunately we don't have any in house Oracle development experience to speak of but as a senior dev it has fallen to me to lead the project. So far I have managed to make our app connect to an Oracle database (I'm using Oracle XE 11.2) by using the following connection string:
Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=VS010-ORA11GR1)(PORT=1523))(CONNECT_DATA=(SERVICE_NAME=DEVORA)));User Id=dbo;Password=dbo;
The reason we decided to use this type of connection string is because we do not want to rely on changing tnsnames.ora on every client machine. However, as you can see this specifies an Oracle user and associated password. We also need to provide the ability to use the equivalent of SQL Server integrated security.
According to the literature I have read, to do this I simply need to specify / as the user id and then omit the password portion (as this is ignored anyway for Windows authentication). I also created the user in Oracle, making sure it matched the Windows user, with the following snippets:
CREATE USER "OPS$<DOMAIN>\<user>" IDENTIFIED EXTERNALLY;
GRANT CONNECT,RESOURCE TO "OPS$<DOMAIN>\<user>";
I also checked that the sqlnet.ora file on my local machine which hosts the XE instance and my dev environment contained the line:
SQLNET.AUTHENTICATION_SERVICES= (NTS)
I understood that this would enable my app to connect to the Oracle database uing Windows Authentication. However what actually happens is that I get the following Oracle error message:
ORA-01005: null password given; logon denied
this doesn't make much sense because of course its null - it's supposed to be, according to the tutorials I've read.
The app targets .Net Framework 3.5, we are using the System.Data.OracleProvider and the actual connecting and so on is handled by Enterprise Library 5. Incidentally, I am aware of the deprecation of the OracleClient component but I just want this to work before I go into the extra complexities of changing providers.
Can anyone tell me what I'm missing? Have I chosen the wrong type of connection string? I apologise for any basic mistakes but I have always managed to avoid Oracle until now so my knowledge of it is close to zero.
Many thanks
I had the same problem and solved after adding this to conn. string:
Integrated Security=yes
To expand on the answer above by #Stikut. I tested this out with NHibernate 3.3.3.GA and it works.
user id=/;password=;Integrated Security=yes