Query a remote table with Database Links

How do database links work with ODP.NET? The following code produces an "ORA-02041: client database did not begin a transaction" error on the Fill method.
SQL (in acme instance):
CREATE DATABASE LINK sales.hq.acme.com
CONNECT TO scott IDENTIFIED BY tiger
USING 'sales'
VB .NET:
Dim cn As New OracleConnection("Data Source=acme;User ID=scott;Password=tiger;")
Dim da As New OracleDataAdapter("SELECT * FROM [email protected]", cn)
Dim ds As New DataSet
da.Fill(ds, "RemoteEmp")

Just read running procedure on remote db???
Changed first line to
Dim cn As New OracleConnection("Data Source=acme;User ID=scott;Password=tiger;Enlist=false")
and it works now.
That's what I get for searching the forum instead of browsing.

Similar Messages

Strange problem with Database LInk

Hi Everyone,
I have strange problem with Database Link in Oracle 11g Express Edition;
There are two computers: computer-server and computer-client. Tnsnames.ora are the same on both computers ie.
CT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = krzysztof)(PORT = 1521))
(CONNECT_DATA = (SERVICE_NAME = XE)
I created database link :
Create database link zdalny
Connect to <user_id> identified by <password>
using ‘CT’;
Client can’t connect with server when I am using above command. But when I change “using” for using ‘krzysztof:1521’ or using ‘krzysztof’ or using ‘server IP:1521’ – everything is ok.
Why I am asking. Because in all materials which I am reading about Oracle command with using ‘CT’ should be working correct. But there is not. Do you know, why?
Thanks in advance and apologize for my English.
Rgds
Krzysztof

Krzysztof Szymaniak wrote:
Thanks for all replies.
Below is server's tnsnames.ora
CT =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = krzysztof)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
SQL Error: ORA-12154: TNS:could not resolve the connect identifier specified
12154. 00000 - "TNS:could not resolve the connect identifier specifie
Rgds
Krzysztof
PS. I tried with using 'XE' - not working.Assuming that is the correct tnsnames, of course XE is not working. You don't have a tnsnames entry for 'XE'.
You need to be aware that when using a dblink, the client is the db in which the link is defined, not the desktop from which you connect to that database.
I think you need to start here:
http://edstevensdba.wordpress.com/2011/02/26/ora-12154tns-03505/
http://edstevensdba.wordpress.com/2011/02/09/sqlnet_overview/ (Help! I can’t connect to my database )
http://edstevensdba.wordpress.com/2011/02/16/sqlnet_client_cfg/ (Help! I can’t connect to my database (part duex) )
The fact that your client (db link) is a database doesn't change anything taught in the above.

Query builder: tables from Database Link

Hi APEX people,
Is there a way to use tables from a (remote) Database Link in the Query Builder?
In the Query Builder I seem to have only access to locally (schema) stored tables.
I already tried to define a Synonym for the remote tables I wanted to use, but that didn't work either.
Thanks in advance.
Maurice

Hi,
First of all, can you select from them ie
SELECT *
FROM my_table@my_linkAlso you can't see them as tables in the schema because they're not tables in the schema.
Try creating a view like...
CREATE OR REPLACE FORCE VIEW m_table_vw AS
SELECT *
FROM my_table@my_link;You should be able to see the view in the schema in the query builder and use that.
Cheers
Ben

Issue with query involving remote tables

Hi I have a query inside a procedure that has 4 union all statements ,2 of which are based on tables at a remote database.
The query is something like
Select col1, col2, col3…..col n from Table_a, table_b, table c where join condition and certain hard-coded conditions based on run time parameters
Union all
Select col1, col2, col3…..col n from Table_a, table_b , table c where some join condition and certain hard-coded conditions based on run time parameters
Union all
Select col1, col2, col3…..col n from Table_a@remote_db, table_b@remote_db, table c@remote_db where join condition and certain hard-coded conditions based on run time parameters
Union all
Select col1, col2, col3…..col n from Table_a @remote_db, table_b @remote_db, table c@ remote_db where some join condition and certain hard-coded conditions based on run time parameters
The join conditions on the tables are quite good and when executed individually bring data in good time.The queries on the remote database also run fine when I execute them in the remote database.
However when I run this query, it doesn’t get data at all and after hours of running I have to cancel or kill it.I don’t get anything in the long-ops and in the wait class it just shows “SQL*Net message from dblink” or “SQL*Net more data to dblink”.
I thought that there could be some latency issues AND the data retreival over the dblink could be slow, so I tried the /*+driving_site(rmote table alias)*/ hint , after which it comes up in the long ops as its reading from Table a/ table b from my current database but the wait time is something like millions of seconds and it runs forever.
The issue is Table A and Table B both in the remote and the current database are huge tables with at least 40-50 million records in them.
Can anyone suggest an easy way out in this scenario, other than the hard way of re-designing the entire program(which I am afraid I might have to in the end).
Thanks

@metzquar I Put the hint in the unions where I am accessing the remote tables
@blushadow .. i was thinking about that but as these remote tables are in a sort of archived database, I dont think I will be allowed to create a mview.But thats a good suggestion.
@Earth.. I tried that , but the table population itself gets very time consuming
Thanks

Query to table in Database Link returns value from local table

Hi
I made a databaselink (Create database link db_a.world connect to db_a identified by <user> using 'db_a.world')
Then I query a table, connected as a user in db_b.world (this is our developer database - identical to db_a): Select count(*) from table@db_a.world.
When I get the result - it comes from the database I am logged in to (db_b)! - This is easy to check, because when I run select count(*) from table - it shows the same number. When I connect to the remote database, the same query shows another (correct) number.
When I created the database link, Oracle demanded a loopback clause. Why is that, and can this be the reason for the strange behaviour?
Thanx
Anders
Narvik, Norway

Hi Anders,
A loopback database link is when you want to test connecting to the same database as say a different user. It can be used for testing purposes. Creating a database link doesn't require a loopback clause. The reason why you are getting the same row count as db_b.world because db_a.world has been created as a loopback link.
In the example you have Create database link db_a.world connect to db_a identified by <user> using 'db_a.world' , the clause after 'connect to' is meant to be the username and the clause after 'identified by' is meant to be the password.
So, create a regular database link like this:
create database link db_a_link connect to <user> identified by <passwd> using <service name>
You shouldn't get an error message that the loopback clause has to be specified. Then try querying and hopefully it will work.
-Raj

Stored procedure with database link with "from table(...)"

Hi guys,
I've been told I can't create views on a database by the design team and so have to use this stored procedure to obtain the values.
select HAN_ID, HAN_DS, GLOBAL_IN, LOCAL_IN
from table(cast(ODADMIN.ODP00002_QUERY.Execute001@DBLINK(11312,'EN') as
ODADMIN.ODP00002_001_Array@DBLINK)) WHERE LOCAL_IN = 'Y';I've been told that it works when you remove the database links (so on the actual database) when you remove the cast part. I've tried it with my link and with/without the cast part but it doesn't work. With the example above I get the error: ORA-00907: missing right parenthesis.
When I remove the CAST-AS and the additional parenthesis it brings i get the error: ORA-00904: "ODADMIN"."ODP00002_QUERY"."EXECUTE001": invalid identifier
When I do table( *"* ODADMIN.ODP00002_QUERY.Execute001@MWW_DEV(11312,'EN') *"* )... -- wrapping the call in speech marks I get: ORA-00972: identifier is too long
Anyone see what's wrong? Thanks for any help.
Mike

Hi Ben,
Asking now. By a view I mean one local to the database; I could create one on APEX but then I use the database link twice instead of just 1.
His reasoning Ben:
Firstly, Maintenance. We will have to maintain additional views (at additional code). Secondly, if the view has a JOIN, then you can't update through it (without complexities). If we have to get the View to pass the data to a Procedure (that's a pain). Also, standards..
All update occur via either a Procedure, or a Base view, across over 1000 tables
That's the standard, and doing things differently is costly long term
People will not know how it works, it will have to be explained, maintained..etc.
If the Application has the Business Rules, then updates via Base Views, that's a more standard way of developing. Also, if you update via this view, you'll update multiple rows in one call, which is in-effficient if only ONE row needs to change. Therefore, single row updates from the Application is more efficient
The procedure is as follows:
--SET SERVEROUTPUT ON
DECLARE
nPBusLoc       NUMBER(5):=11312;
sPHanId        VARCHAR2(3):='SB1';
sPLngId        VARCHAR2(2):='EN';
sPDesc         VARCHAR2(30);
sPAllowAlloc   VARCHAR2(1);
sPShowEnq      VARCHAR2(1);
sPAllowDel     VARCHAR2(1);
sPShowScan     VARCHAR2(1);
sPGlobalLocal VARCHAR2(1);
sPReturnCd     VARCHAR2(2);
sPReturnTx     VARCHAR2(100);
BEGIN
ODADMIN.ODP00001.getHandlingCodes
                       (nPBusLoc    -- IN   NUMBER
                      ,sPHanId      -- IN   VARCHAR2
                      ,sPLngId      -- IN   VARCHAR2
                      ,sPDesc       -- OUT VARCHAR2
                      ,sPAllowAlloc -- OUT VARCHAR2
                      ,sPShowEnq    -- OUT VARCHAR2
                      ,sPAllowDel   -- OUT VARCHAR2
                      ,sPShowScan   -- OUT VARCHAR2
                      ,sPGlobalLocal-- OUT VARCHAR2
                      ,sPReturnCd   -- OUT VARCHAR2
                      ,sPReturnTx   -- OUT VARCHAR2
DBMS_OUTPUT.PUT_LINE('nPBusLoc                 = '||nPBusLoc              );
DBMS_OUTPUT.PUT_LINE('sPHanId                  = '||sPHanId               );
DBMS_OUTPUT.PUT_LINE('sPLngId                  = '||sPLngId               );
DBMS_OUTPUT.PUT_LINE('sPDesc                   = '||sPDesc                );
DBMS_OUTPUT.PUT_LINE('sPAllowAlloc             = '||sPAllowAlloc          );
DBMS_OUTPUT.PUT_LINE('sPShowEnq                = '||sPShowEnq             );
DBMS_OUTPUT.PUT_LINE('sPAllowDel               = '||sPAllowDel            );
DBMS_OUTPUT.PUT_LINE('sPShowScan               = '||sPShowScan            );
DBMS_OUTPUT.PUT_LINE('sPGlobalLocal            = '||sPGlobalLocal         );
DBMS_OUTPUT.PUT_LINE('sPReturnCd               = '||sPReturnCd            );
DBMS_OUTPUT.PUT_LINE('sPReturnTx               = '||sPReturnTx            );
END;
/Mike
Edited by: Dird on 27-Aug-2009 01:50

PL/SQL :ORA-04052 with Database link

i have created a database link in my producation database as following
CREATE PUBLIC DATABASE LINK <NAME>
CONNECT TO <USER>
IDENTIFIED BY <P/W>
USING <CONNECT STRING OF TARGET DATABASE
oracle version 9.0.2.8
OS : Windows 2003 EE R2 SP2
Using oracle failsafe 3.3.4 with windows cluster
Problem Description :
whenever i run my pl/sql procecdure to pull the data from the target database i get the following error
ERROR at line 3
ORA-06550:line 3 column 2
PL/SQL : ORA-04052: error occured when looking up remote object _<SCHEMA>.<TABLE>@<DATABASE LINKE NAME>_
ORA-00604 : ERROR occured at recursive SQL level 1
ORA-03106 : fatal tow-task communication protocol error
ORA-02063: preceding line from <DATABASE LINK NAME>
I have tested the same way in the test environment the same oracle version as well the OS but without oracle failsafe and windows cluster
the script goes smoothly with out any errors.
i have google and checked the OTN for all available solutions but still nothing its not getting throw
i will be very thankful for your replys and solutions
any farther clarification i am ready
thanks in advance

Hi,
This forum is for issues connecting to non-Oracle databases. As the problem is using PL/SQL to connect to another Oracle database then it would be better to post a thread in the PL/SQL forum -
PL/SQL
If you are trying to connect to a non-Oracle database then please give us the details of which non-Oracle database and the software you are trying to use to connect.
Regards,
Mike

ORA-00022 with Database Link and Trigger

Hello altogether,
I got a very strange behaviour with my oracle 10.2.
I have two nets N1 and N2, where N1 can access the servers in N2, but not the other way round. In both nets I have an Oracle database running (D1 and D2).
In N1 I calculate some data, which must be replicated to the database in N2. I do this by using triggers on my tables in database D1 copying the inserted or changed data to D2 by using a shared public database link.
This works fine most of the time. But sometimes I get the following error:
ERROR [STDERR] Caused by: java.sql.SQLException: ORA-02068: following severe error from D2
ORA-00022: invalid session ID; access denied
ORA-06512: at "CUSTOMER", line 13
ORA-04088: error during execution of trigger 'CUSTOMER'
When I use the database links manually, they work.
Any idea?
Thank you!!
Daniel

The ORA-02068 message might be important
02068, 00000, "following severe error from %s%s"
// *Cause: A severe error (disconnect, fatal Oracle error) received from
// the indicated database link. See following error text.
// *Action: Contact the remote system administrator.Have you searched Oracle support for any bugs associated with the ORA-02068?
Was the remote session killed, the remote database changed to restricted session, or bounced?
I take it the distributed session is created using a dedicated session and not shared server?
HTH -- Mark D Powell --

Update openquery remote table with join

Hi All,
I have a problem with OPENQUERY update on remote table. I've googled for days, and can't solve the problem.
Here is the problem:
Local server MS SQL 2005.
Remote server: MySQL.
The linked server is communicating through MySQL ODBC 5.1
I created the following code for update (tried many other version too, this is the last one):
update openquery(Remoteserver,'select products_id, products_price, products_last_modified, products_stock from products1')
set
products_price=A.products_price,
products_stock=A.products_stock,
products_last_modified=getdate()
FROM
(select * from vi_products_update) AS A INNER JOIN
openquery(octopus, 'select products_id from products1')AS B
ON A.products_id=B.products_id
When I run the query the columns are updated with the same value, for each record. It looks the value is the first which match the criteria. Each (remote and local) table has as primary key products_id. In this example I used as result set for local a view, but I have the same result if I use a table.
the products_last_modified column is updated in order, and if I update for e.g. the products_price with a constant that is ok too. The problem should be somewhere with join, but I can' get it where.
THX for any help
ab

Hi
Did you ever solve this problem
I have the same issue trying to update many rown in a MySQL table from SQL2005 using the syntax below,
UPDATE
openquery(DEV,'select id, `desc` from todLocationGroups')
SET [desc] = V.Destination_Group FROM
(select * from VTM_TOD_Rate) as V inner join
openquery(DEV,'select id, `desc` from todLocationGroups') as K
ON K.id = V.TOD_LG_ID
but i get this error
OLE DB provider "MSDASQL" for linked server "KAYOTE_DEV" returned message "Row cannot be located for updating. Some values may have been changed since it was last read.".
Msg 7343, Level 16, State 4, Line 1
The OLE DB provider "MSDASQL" for linked server "KAYOTE_DEV" could not UPDATE table "[MSDASQL]". The rowset was using optimistic concurrency and the value of a column has been changed after the containing row was last fetched or resynchronized.

Calling remote procedure through database link

Hi,
I have a procedure in a package with a type I delcared as follows:
Database1 :
create or replace package p1
is
TYPE dependents_rec IS RECORD (
name VARCHAR2 (80),
dob date);
TYPE dependents IS TABLE OF dependents_rec
INDEX BY BINARY_INTEGER;
procedure proc1 (p_id in number,
p_dependents out dependents );
end;
On another database database2 i want to call the above procedure from within a procedure in a package that works as a wrapper package with similar structure.
I recieve the error "Wrong number or types of parameters" error because type dependents is not the same as within the package in database 1.
How can I call the procedure p1.proc1 over a database link ?
Thank you

Hi,
On database1:
CREATE OR REPLACE PACKAGE types_pkg is
TYPE dependents_rec IS RECORD (
NAME VARCHAR2 (80),
sex NUMBER (1),
birth_date DATE,
birth_place NUMBER (3),
status NUMBER (1),
unique_id VARCHAR2 (15)
TYPE dependents IS TABLE OF dependents_rec
INDEX BY BINARY_INTEGER;
end;
CREATE OR REPLACE PACKAGE wrapper_pkg_demo
AS
PROCEDURE read_person_no (
p_person_id NUMBER,
p_dependent_info OUT types_pkg.dependents
END;
CREATE OR REPLACE PACKAGE BODY wrapper_pkg_demo
AS
PROCEDURE read_person_no (
p_person_id NUMBER,
p_dependent_info OUT types_pkg.dependents
IS
BEGIN
person_pkg.read_person_no (p_person_id, p_dependent_info);
END;
END;
On database 2:
CREATE OR REPLACE PACKAGE person_pkg
AS
PROCEDURE read_person_no (
p_person_id NUMBER,
p_dependent_info OUT types_pkg.dependents@database1
END;
CREATE OR REPLACE PACKAGE body person_pkg
AS
PROCEDURE read_person_no (
p_person_id NUMBER,
p_dependent_info OUT types_pkg..dependents@database1
IS
BEGIN
null;
END;
END;
When compiling the package body on database 1
ORA-04052: error occurred when looking up remote object TYPES@MOI
ORA-00604: error occurred at recursive SQL level 1
ORA-02019: connection description for remote database not found
Noting that the database link are working properly and when compiling the package on database 2, it compile successfully
Thank you

Calling a remote procedure with db link - SQL Plus hangs

I am trying to call a procedure from a remote database with a db link, within a local procedure. The purpose of the calling the procedure is to get the server time from that database. When I try to compile this procedure on the local database SQL Plus hangs without giving any error message, I have to close SQL Plus. Below are my two procedures:
Local procedure:
CREATE OR REPLACE PROCEDURE get_server_time(p_remotetime IN OUT VARCHAR2)
IS
/*Grabs the system time from remote database .
l_remotetime varchar2(16) ;
BEGIN
get_remote_time(l_remotetime);
p_remotetime := l_remotetime;
END ;
Remote procedure:
CREATE OR REPLACE PROCEDURE get_remote_time(p_remotetime in out VARCHAR2)
IS
/* Grabs the system time from remote database and returns it to the
calling proc.
l_remotetime varchar2(16) ;
BEGIN
SELECT to_char(sysdate,'YYYYMMDDHH24MISS')
INTO l_remotetime
FROM dual ;
p_remotetime := l_remotetime ;
END ;
I personaly do not see anything unusall with the two procedures, but cant figure out what is making SQL*Plus hang.
Any help would be much appreciated.
Thanks In Advance

Hello
Are you able to run the procedure connected to the livetolocal database directly? It looks as if you either have a missing table or the permisions for the user associated with the database link are not sufficient.
As for calling the procedure, it would probably be more managable if you created a public synonym for it to hide the actual location. That way if you want to change the name of the DB link, or where it points to, no-one has to change their code, you just have to change the synonym.
HTH
David

Issue while creating location with database link

Hi all,
I am using OWB 10.2.0.4.0 (same Oracle DB version). I am trying to create a location using a database link.
When I select the location which the database link is located (From location drop-down list), I face the following error.
>
ENV0036: The selected location is not valid.
ENV0036: The selected location is not valid.
     at oracle.wh.service.sdk.integrator.RepositoryUtils.createDBLinkWithLocation(RepositoryUtils.java:156)
     at oracle.wh.ui.environment.wizards.DatabaseLinkComponent.init(DatabaseLinkComponent.java:61)
     at oracle.wh.ui.environment.wizards.DatabaseLinkComponent.reload(DatabaseLinkComponent.java:204)
     at oracle.wh.ui.environment.wizards.FromLocationComponent.itemStateChanged(FromLocationComponent.java:111)
     at javax.swing.JComboBox.fireItemStateChanged(JComboBox.java:1162)
     at javax.swing.JComboBox.selectedItemChanged(JComboBox.java:1219)
     at javax.swing.JComboBox.contentsChanged(JComboBox.java:1266)
     at javax.swing.AbstractListModel.fireContentsChanged(AbstractListModel.java:100)
     at javax.swing.DefaultComboBoxModel.setSelectedItem(DefaultComboBoxModel.java:88)
     at javax.swing.JComboBox.setSelectedItem(JComboBox.java:551)
     at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:597)
     at javax.swing.plaf.basic.BasicComboPopup$ListMouseHandler.mouseReleased(BasicComboPopup.java:749)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:232)
     at java.awt.Component.processMouseEvent(Component.java:5100)
     at javax.swing.plaf.basic.BasicComboPopup$2.processMouseEvent(BasicComboPopup.java:452)
     at java.awt.Component.processEvent(Component.java:4897)
     at java.awt.Container.processEvent(Container.java:1569)
     at java.awt.Component.dispatchEventImpl(Component.java:3615)
     at java.awt.Container.dispatchEventImpl(Container.java:1627)
     at java.awt.Component.dispatchEvent(Component.java:3477)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
     at java.awt.Container.dispatchEventImpl(Container.java:1613)
     at java.awt.Window.dispatchEventImpl(Window.java:1606)
     at java.awt.Component.dispatchEvent(Component.java:3477)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:480)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:141)
     at java.awt.Dialog$1.run(Dialog.java:542)
     at java.awt.Dialog$3.run(Dialog.java:569)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.awt.Dialog.show(Dialog.java:567)
     at java.awt.Component.show(Component.java:1133)
     at java.awt.Component.setVisible(Component.java:1088)
     at oracle.bali.ewt.wizard.WizardDialog.runDialog(Unknown Source)
     at oracle.bali.ewt.wizard.WizardDialog.runDialog(Unknown Source)
     at oracle.wh.ui.owbcommon.OWBWizard.initialize(OWBWizard.java:815)
     at oracle.wh.ui.owbcommon.OWBWizard.<init>(OWBWizard.java:168)
     at oracle.wh.ui.owbcommon.OWBWizard.<init>(OWBWizard.java:147)
     at oracle.wh.ui.owbcommon.IdeUtils._doLaunchDefinition(IdeUtils.java:1188)
     at oracle.wh.ui.owbcommon.IdeUtils.showWizard(IdeUtils.java:471)
     at oracle.wh.ui.owbcommon.IdeUtils.showWizard(IdeUtils.java:427)
     at oracle.wh.ui.jcommon.tree.WBRepositoryObjectTree.launchWizard(WBRepositoryObjectTree.java:502)
     at oracle.wh.ui.console.commands.CreateByWizardCmd.showUI(CreateByWizardCmd.java:33)
     at oracle.wh.ui.console.commands.CreateCmd.performAction(CreateCmd.java:76)
     at oracle.wh.ui.console.commands.TreeMenuHandler$1.run(TreeMenuHandler.java:188)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:189)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:478)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
>
Could you please let me know how to solve this and how to create such location with OMB*Plus?
Thanks,
Sebastian

Hi David,
Thanks a lot for the tip. Now I was able to use this and using a registered location.
OMBCREATE LOCATION 'X' SET PROPERTIES (TYPE,VERSION,CONNECTION_TYPE, SCHEMA) VALUES ('ORACLE_DATABASE','11.1','DATABASE_LINK','MY_SCHEMA')
OMBCREATE CONNECTOR 'REGISTERED_LOC/X SET PROPERTIES (DATABASE_LINK_NAME) VALUES ('MY_DBLINK') SET REF LOCATION 'X'
OMBCOMMIT
OMBCC '/MY_PROJECT'
OMBCAC 'DEFAULT_CONFIGURATION'
OMBCONNECT CONTROL_CENTER USE 'owb_user/owb_user'
OMBREGISTER LOCATION 'X' REUSE
OMBCOMMITBut now my question is the following.
I am having problems to import the metadata from X.
When create a module (source), I am able to make "data location" from location 'X' but when I want to import a table from location 'X' is not possible, because it shows as a plausible metadata location as "REGISTERED_LOC"
Could you please let me know how to use 'X' as metadata location?
Thanks!
Sebastián

Insertion into local table from remote table with contains clause

Hi all,
We are tasked to insert some rows into our database from another database. We tried to use DBLinks to link the 2 databases and were able to use Select statements to filter out the data that we need to insert into our database.
These statements take the form of: Select * from RemoteTable where contains@RemoteLink(IndexColumn, 'car')>0;
where RemoteLink is the DBLink that we have created.
However Oracle gave us an error (ORA-00949: illegal reference to remote table) when we tried to insert the dataset from the above statement into our local table. We used the following statement in doing so: Insert Into LocalTable (Select * from RemoteTable where contains@RemoteLink(IndexColumn, 'car')>0);
Even if we use Create Table, Oracle gave us the same error when we tried to push the data from the Select Statement into the new table.
Could anyone advise us whether it is possible to insert such data into a local table? And if som what is the proper way of doing it?
Many thanks to any advises.

Hi,
there is document 261741.1 on Metalink. This states explicitly that it is not possible to invoke remote user-defined operators, and contains is such. The solution given in the article is to create a wrapper function on the remote site and this one calling in stead of contains.
Herald ten Dam
htendam.wordpress.com

Query on a table with indexed date field

I have a table with a date column which is indexed. If I run a query like "select column1 where date_field='20-JAN-04' for example it is fast and uses index.
If I run select column1 where date < '20-JAN-04' it is slow and doesnt use the index. I logged a TAR and Oracle told me that this is to be expected as not using the index in this case is the most effiecient way of doing the query.
Now my concept of an index is like the index of Yellow Pages(telephone directory) for example. In this example if I look for a name that is say "Halfords" or below, I can see all entries for Halfords and all the way to ZZZ in one block.
I just cant see , in a common sense way why Oracle wont use the index in this type of query.
George

Using the concept of a telephone directory is wrong. In a telephone directory you have all information order by the name. However in your table (if it is not an IOT) you don't have all information/rows ordered by your date_field. Rather think at the document "Oracle9i Database Concepts" and it's index.
Let's say you want to find all indexed words larger then "ISO SQL standard" (ok that doesn't make sense but it is just an example). So would it be faster to read the whole document or to lookup each word in the index and then read the entire page (Oracle block) to find the word.
It's not allways easy to know in advance if the query will be faster over the index or a full table scan. what you need to do is to well analyze (dbms_stats) the table and it's index, in most cases Oracle chooses the right way. You may also use the hint /*+ index(table_name index_name) */ and will see if it would be faster over the index or not.
A good document about that subject is:
http://www.ioug.org/tech/IOUGinDefense.pdf
HTH
Maurice

Accessing Tables via Database Links.

Hello. I have created a database link in order to allow me to access tables that exist in a database separate from the one that APEX exists on. The link seems to work because I can query these tables in the APEX SQL Commands windows by running the following command,
Select * from table_name@database_link;
However, when I try to create an application in Application Builder, these tables do not seem to be accessible. Also, I can't see them in the Object Browser. I believe this problem is related to db permissions of some sort, but don't know how to correct it. Thank you for your help.

Hello:
The kind of view tht you have created is updateable.
You can create an APEX form to do DML against this view much like in the manner you would create a form against a table.
The link below might help
Re: Cannot build form off from view?
Varad

Query a remote table with Database Links

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