Federated Server

[Praveen_db2]

Hi All
DB2 8.1.3,Windows
I have 2 databases in a single instance, say DB_1 and DB_2.I need to query
a table from DB_1 in DB_2.I am try to use a nickname for it.But nickname
creation is not possible until federated server is made.Please tell me how
to create a federated server.Moreover, is there any thing extra which I
need to buy for this?When I gave this command to create a server
CREATE SERVER "TEST1"
TYPE DB2/UDB
VERSION 8.1
WRAPPER DRDA
AUTHORIZATION "SAM_USER" PASSWORD "SAM_PWD"
OPTIONS
(NODE 'TEST1'
,DBNAME 'TEST1'
);
It says
SQL0204N "DRDA" is an undefined name. SQLSTATE=42704
Do I need to buy something extra for this?
Please advise.

Praveen

[Knut Stolze]

Praveen_db2 wrote:

Hi All
DB2 8.1.3,Windows
I have 2 databases in a single instance, say DB_1 and DB_2.I need to query
a table from DB_1 in DB_2.I am try to use a nickname for it.But nickname
creation is not possible until federated server is made.Please tell me how
to create a federated server.Moreover, is there any thing extra which I
need to buy for this?When I gave this command to create a server
CREATE SERVER "TEST1"
TYPE DB2/UDB
VERSION 8.1
WRAPPER DRDA
AUTHORIZATION "SAM_USER" PASSWORD "SAM_PWD"
OPTIONS
(NODE 'TEST1'
,DBNAME 'TEST1'
);
It says
SQL0204N "DRDA" is an undefined name. SQLSTATE=42704
Do I need to buy something extra for this?
Please advise.

You have to perform the following steps:

(1) Register a wrapper.
A wrapper is nothing else than a library that implements the glue code
between the DB2 engine and the remote data source. In your case, the
remote data source happens to be the same machine/DB2 instance.
DB2 comes with wrappers for all DB2 and Informix data sources. I'll
have to purchase WebSphere Information Integrator for other systems.
(2) Register a server.
A server identifies a remote data source. This is a single database in
DB2 terminology. In your case, we're talking about 'DB_1' (or 'TEST1').
(3) Register a user mapping.
The user connected to the federated server (where you want to create
the nickname) may not be allowed to access the remote data source.
Thus, you have to define the credentials that shall be used when
accessing the data source. (And those credentials are specific for each
user connecting the federated server.)
(4) Register a nickname.
A nickname is just a pointer referring to a table at the remote data
source.

Here is an example that should work for you, assuming that RMT_DB is the
name of the remote database:

CREATE WRAPPER drda;

CREATE SERVER srv
TYPE DB2/UDB
VERSION '8'
WRAPPER drda
AUTHORIZATION "stolze" PASSWORD "passwd"
OPTIONS (DBNAME 'rmt_db');

CREATE USER MAPPING FOR USER SERVER srv
OPTIONS ( REMOTE_AUTHID 'stolze', REMOTE_PASSWORD 'passwd' );

CREATE NICKNAME n FOR srv.syscat.views;

SELECT * FROM n;

--
Knut Stolze
DB2 Information Integration Development
IBM Germany

[Praveen_db2]

Thanx a ton Knut

[The Maxx]

Plus you should set the FEDERATED database manager parameter to YES.
(May be that was to obvious, but I didn't see it in the previous post.

Regards,
Max Cortez

Knut Stolze wrote:

Praveen_db2 wrote:

Hi All
DB2 8.1.3,Windows
I have 2 databases in a single instance, say DB_1 and DB_2.I need to query
a table from DB_1 in DB_2.I am try to use a nickname for it.But nickname
creation is not possible until federated server is made.Please tell me how
to create a federated server.Moreover, is there any thing extra which I
need to buy for this?When I gave this command to create a server
CREATE SERVER "TEST1"
TYPE DB2/UDB
VERSION 8.1
WRAPPER DRDA
AUTHORIZATION "SAM_USER" PASSWORD "SAM_PWD"
OPTIONS
(NODE 'TEST1'
,DBNAME 'TEST1'
);
It says
SQL0204N "DRDA" is an undefined name. SQLSTATE=42704
Do I need to buy something extra for this?
Please advise.

You have to perform the following steps:

(1) Register a wrapper.
A wrapper is nothing else than a library that implements the glue code
between the DB2 engine and the remote data source. In your case, the
remote data source happens to be the same machine/DB2 instance.
DB2 comes with wrappers for all DB2 and Informix data sources. I'll
have to purchase WebSphere Information Integrator for other systems.
(2) Register a server.
A server identifies a remote data source. This is a single database in
DB2 terminology. In your case, we're talking about 'DB_1' (or 'TEST1').
(3) Register a user mapping.
The user connected to the federated server (where you want to create
the nickname) may not be allowed to access the remote data source.
Thus, you have to define the credentials that shall be used when
accessing the data source. (And those credentials are specific for each
user connecting the federated server.)
(4) Register a nickname.
A nickname is just a pointer referring to a table at the remote data
source.

Here is an example that should work for you, assuming that RMT_DB is the
name of the remote database:

CREATE WRAPPER drda;

CREATE SERVER srv
TYPE DB2/UDB
VERSION '8'
WRAPPER drda
AUTHORIZATION "stolze" PASSWORD "passwd"
OPTIONS (DBNAME 'rmt_db');

CREATE USER MAPPING FOR USER SERVER srv
OPTIONS ( REMOTE_AUTHID 'stolze', REMOTE_PASSWORD 'passwd' );

CREATE NICKNAME n FOR srv.syscat.views;

SELECT * FROM n;

--
Knut Stolze
DB2 Information Integration Development
IBM Germany

[Knut Stolze]

The Maxx wrote:

Plus you should set the FEDERATED database manager parameter to YES.
(May be that was to obvious, but I didn't see it in the previous post.)

You're right! I always forget that until I hit the respective error message
the first time. ;-)

--
Knut Stolze
DB2 Information Integration Development
IBM Germany