Slow database link behaviour
I've written an accouting program 15 years ago that runs on developer, with excellent performance overall. Now I'm trying to write an apex program that uses a database link to access the data on a 10.1.0.3.0 SE database. Two things are happening: 1) every once in a while, when I navigate on a view in an XE report (the usual "next 15 records" option,) apex asks if I want to "save" the file (f.bin) and then it gets real slow! Too slow for commercial use... I mean, it takes minutes to move between pages. 2) every two pages that I navigate, it gets really, really slow! It goes from the first page to the next fast; fast again; and then sloooow; fast, fast and then slow; fast, fast, and then: save the page. It is driving me nuts. I've tried using a 10g SE table@, I've tried using a 10g SE view@, and I've tried using an XE view on a 10g SE table - but I am having the same results... However, if I write an XE table, based on a 10g SE view, and do not use the database link, keeping everything local (using only the XE) - it gets very fast, and the strange behavour ends! I wanted to use a database link because it would be easier, much simpler to write the program, and very dynamic. If a have to transfer data between databases it will be much harder to do it.
Any ideas? Has anyone come across such behaviour? Do you believe it could be a bad installation? By the way, the 10g SE runs on RHES4 and the XE runs on debian; I'am using apex 2.0. Thanks.
An update on the problem: I've decided to go with the whole XE solution, and I wrote another application, that works just fine! It's normal, I mean, fast! That is, until I transfer data between databases - then it gets real slow until the user logs out. Interesting, isn't it? Later on I'll try the other way around, connecting to SE and transfering the data from XE. I am using something like:
insert into table@dblink select * from table; delete from table;
insert into table select * from table@dblink; delete from table@dblink;
Similar Messages
-
Database Link makes manipulation slow
i have oracle 8.5 with developer 6i.
my application uses two database server and there is a database link between both server.
when user make a transaction and commit the manipulation procedures post the transaction on local server and on other server through database link.
but some time it freezes when user press save button and resume after about 5 seconds. and even some time it hangs up for long time.
is there any solution to get rid of this problem?
i m working in a client server environment with LAN.
regards
adeelhow much time does it take if you do the same amount of data transaction on sqlplus with the two linked databases?
The solutions depend on the details of your task.
e.g.,if data are huge, using the database night cronjob to make the tansactions to the linked one. -
Hi
I try send data from DB1 to DB2 via dblink.
I created link
CREATE DATABASE LINK MED
CONNECT TO user IDENTIFIED BY pass
USING
'(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.255.134.30)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = med)
and I can select data from remote table without errors.
When I try Insert data to remote table (with PLSQL)
for xx in (select u.*, sm.nr_gm, sm.nazwa nazwa_miejsc from adresy u ,sl_miejscow@med sm where u.miasto=sm.ident and
not exists
(select * from PAC@med pk where pk.ident_pac=u.identyfikator and pk.jednoraz='K' )
and u.data_zap is not null)
loop
insert into PAC@MED
(ident_pac, od_daty, do_daty, adr_ulica, adr_kod, nr_domu, nr_lokalu, telefon, jednoraz,z_kim_mieszka,ident_miejsc,ident_poczty,ident_kraj, adr_gmina, WOJEW_KOD, ADR_MIEJSC)
values
( xx.identyfikator, sysdate, to_date('31/12/2099','dd/mm/yyyy'),xx.ULICA, xx.KOD,xx.DOM,xx.LOKAL,
xx.TELEFON,'K',82, xx.MIASTO, xx.MIASTO, xx.kraj, xx.nr_gm,99, xx.nazwa_miejsc);
end loop;
I have error ORA-04054: database link string does not exist.
Can you help me ??
Message was edited by:
AndyPolI found solution.
Main problem was in GLOBAL_NAMES parameter.
This description help me:
Problem Description:
====================
You receive an ORA-02069 error during an insert to a remote database through a
database link when the insert contained a local sequence.
ORA-02069: global_names parameter must be set to TRUE for this operation
Cause: A remote mapping of the statement is required but cannot be
achieved because global_names should be set to TRUE for it to
be achieved.
Action: Issue alter session set global_names = true if possible
Problem Explanation:
====================
This is expected behaviour.
The insert statement is transformed so that it can be executed at the remote
end of the dblink. The reference to the local sequence has to be qualified so
that the remote end knows to call back to the local instance. The qualification
is made by appending @local_dbname.domain to the sequence reference if
global_names=true. When global_names=false, the code cannot make the assumption
that the qualifier will be valid and reports the error ORA-02069 'global_names
parameter must be set to TRUE for this operation'.
Search Words:
=============
DBLINK SEQUENCE GLOBAL_NAMES ORA-2069
Solution Description:
=====================
Use the following workaround:
1. Create a 'temporary' table on the local database for holding the inserts.
2. Insert the entire row into this table.
3. Insert the 'temporary' row from the temporary table to the remote table.
4. Delete the 'temporary' row from the temporary table.
This is slower but it will get around the problem. It help me
OR
Set GLOBAL_NAMES=TRUE in the init<SID>.ora - not work for me
Solution Explanation:
=====================
The first workaround bypasses the remote node having to make a
call back to the local instance to reference the local sequence. -
Interactive report performance problem over database link - Oracle Gateway
Hello all;
This is regarding a thread Interactive report performance problem over database link that was posted by Samo.
The issue that I am facing is when I use Oracle function like (apex_item.check_box) the query slow down by 45 seconds.
query like this: (due to sensitivity issue, I can not disclose real table name)
SELECT apex_item.checkbox(1,b.col3)
, a.col1
, a.col2
FROM table_one a
, table_two b
WHERE a.col3 = 12345
AND a.col4 = 100
AND b.col5 = a.col5
table_one and table_two are remote tables (non-oracle) which are connected using Oracle Gateway.
Now if I run above queries without apex_item.checkbox function the query return or response is less than a second but if I have apex_item.checkbox then the query run more than 30 seconds. I have resolved the issues by creating a collection but it’s not a good practice.
I would like to get ideas from people how to resolve or speed-up the query?
Any idea how to use sub-factoring for the above scenario? Or others method (creating view or materialized view are not an option).
Thank you.
Shaun S.Hi Shaun
Okay, I have a million questions (could you tell me if both tables are from the same remote source, it looks like they're possibly not?), but let's just try some things first.
By now you should understand the idea of what I termed 'sub-factoring' in a previous post. This is to do with using the WITH blah AS (SELECT... syntax. Now in most circumstances this 'materialises' the results of the inner select statement. This means that we 'get' the results then do something with them afterwards. It's a handy trick when dealing with remote sites as sometimes you want the remote database to do the work. The reason that I ask you to use the MATERIALIZE hint for testing is just to force this, in 99.99% of cases this can be removed later. Using the WITH statement is also handled differently to inline view like SELECT * FROM (SELECT... but the same result can be mimicked with a NO_MERGE hint.
Looking at your case I would be interested to see what the explain plan and results would be for something like the following two statements (sorry - you're going have to check them, it's late!)
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two),
sourceqry AS
(SELECT b.col3 x
, a.col1 y
, a.col2 z
FROM table_one a
, table_two b
WHERE a.col3 = 12345
AND a.col4 = 100
AND b.col5 = a.col5)
SELECT apex_item.checkbox(1,x), y , z
FROM sourceqry
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two)
SELECT apex_item.checkbox(1,x), y , z
FROM table_one a
, table_two b
WHERE a.col3 = 12345
AND a.col4 = 100
AND b.col5 = a.col5If the remote tables are at the same site, then you should have the same results. If they aren't you should get the same results but different to the original query.
We aren't being told the real cardinality of the inners select here so the explain plan is distorted (this is normal for queries on remote and especially non-oracle sites). This hinders tuning normally but I don't think this is your problem at all. How many distinct values do you normally get of the column aliased 'x' and how many rows are normally returned in total? Also how are you testing response times, in APEX, SQL Developer, Toad SQLplus etc?
Sorry for all the questions but it helps to answer the question, if I can.
Cheers
Ben
http://www.munkyben.wordpress.com
Don't forget to mark replies helpful or correct ;) -
Database link from XE to 8i - Ok for XE, but error ORA-12705 for ApEx
I have oracle 8.1.7.4 (8i) with these settings:
PARAMETER VALUE
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
{color:#ff0000}NLS_CHARACTERSET CL8MSWIN1251{color}
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT dd-mon-rr
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZH:TZM
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZH:TZM
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
{color:#ff0000}NLS_NCHAR_CHARACTERSET CL8MSWIN1251{color}
NLS_RDBMS_VERSION 8.1.7.4.0
And oracle XE:
NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
{color:#ff0000}NLS_CHARACTERSET AL32UTF8{color}
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
{color:#ff0000}NLS_NCHAR_CHARACTERSET AL16UTF16{color}
NLS_RDBMS_VERSION 10.2.0.1.0
I create database link from XE to 8i - it works fine:
I create view in XE based on table from 8i
and using SQL Developer {color:#0000ff}I can Select/Insert{color} into this view {color:#0000ff}from XE{color}.
BUT when I login {color:#0000ff}to Application Express{color} and try the same SELECT from the view - {color:#0000ff}I get error:{color}
ORA-12705: ORA-12705: invalid or unknown NLS parameter value specified
ORA-02063: preceding line from LINKED8i
What should I do to make Application Express work with the view based on table in remote database correctly - i.e. allow me to Select/Insert/... ?Hi,
i don't have a solution for your problem but i want to share with you my research in using Database Links with XE/Apex.
I have done it a in a lot of projects and in most of all cases it shows a strange behavior when using Database Links via Apex. As far as i know SQL-Request in Apex are executed via the DBMS_SQL-Package. And that seems to be source for all errors and strange behaviors you get.
If you post a SQL-Request directly from your XE, everything's fine. If you do the same from APEX, sometimes it is very slow and sometimes it fails.
So, my approach to this issue is to work with Materialized Views. Your can create MV's on your XE to reference your remote tables and even schedule refreshes. In Apex, you only work with these MV's instead of the remote tables. And everything's going to be fine!
Hope this helps!
Regards, Jens -
Question about using database links in Forms 10g
I have a form that uses a database link for the "Query Data Source Name," i.e. it is set to some_view@some_db_link
For some reason when I run a query using the DB link the query takes approximately 30 seconds. When I remove the link and go local the query takes about one second. Has anybody observed and addressed this issue before (without going local of course)?
Thanks,
ThomasLet me first say that it is never a good idea to use a db link in the data source. It is better to create a synonym in the database and use this as the data source. If the db link changes, you only have to do this in the database, without recompiling forms.
create synonym some_view for some_view@some_db_link
This may already solve your problem. If not, than see if the query is also slow in sqlplus. You may have a problem in your connection between the two databases. -
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!!
DanielThe 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 -- -
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, NorwayHi 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 -
Accessing large partitioned tables over a database link - any gotchas?
Hi,
We are in the middle of a corporate acquisition and I have a question about using database links to efficiently access large tables. There are two geographically distinct database instances, both on Oracle 10.2.0.5 sitting on Linux boxes.
The primary instance (PSHR) contains a PeopleSoft HR and Payroll system and sits in our data centre.
The secondary instance (HGPAY) runs a home grown payroll application and sits in a different data centre to PSHR.
The requirement is to allow PeopleSoft (PSHR) to display targeted (one employee at a time) payroll data from the secondary instance.
For example in HGPAY
CREATE TABLE MY_PAY_DATA AS
SELECT TO_CHAR(A.RN, '00000000') "EMP" -- This is an 8 digit leading 0 unique identifier
, '20110' || to_char(B.RN) "PAY_PRD" -- This is a format of fiscal year plus fortnight in year (01-27)
, C.SOME_KEY -- This is the pay element being considered - effectively random
, 'XXXXXXXXXXXXXXXXX' "FILLER1"
, 'XXXXXXXXXXXXXXXXX' "FILLER2"
, 'XXXXXXXXXXXXXXXXX' "FILLER3"
FROM ( SELECT ROWNUM "RN" FROM DUAL CONNECT BY LEVEL <= 300) A
, (SELECT ROWNUM "RN" FROM DUAL CONNECT BY LEVEL <= 3) B
, (SELECT TRUNC(ABS(DBMS_RANDOM.RANDOM())) "SOME_KEY" FROM DUAL CONNECT BY LEVEL <= 300) C
ORDER BY PAY_PRD, EMP
HGPAY.MY_PAY_DATA is Range Partitioned on EMP (approx 300 employees per partition) and List Sub-Partitioned on PAY_PRD (3 pay periods per sub-partition). I have limited the create statement above to represent one sub-paritition of data.
On average each employee generates 300 rows in this table each pay period. The table has approx 180 million rows and growing every fortnight.
In PSHR
CREATE VIEW PS_HG_PAY_DATA (EMP, PAY_PRD, SOME_KEY, FILLER1, FILLER2, FILLER3)
AS SELECT EMP, PAY_PRD, SOME_KEY, FILLER1, FILLER2, FILLER3 FROM MY_PAY_DATA@HGPAY
PeopleSoft would then generate SQL along the lines of
SELECT * FROM PS_HG_PAY_DATA WHERE EMP = ‘00002561’ AND PAY_PRD = ‘201025’
The link between the data centres where PSHR and HGPAY sit is not the best in the world, but I am expecting tens of access requests per day rather than thousands, so I believe the link should have sufficient bandwidth to meet the requirements.
I have tried a quick test on two production sized test instances and it works in that it presents the data, when I look at the explain plan I can see that the remote database is only presenting the relevant sub-partition over to PSHR rather than the whole table. Before I pat myself on the back with a "job well done" - is there a gotcha that I am missing in using dblink to access partitioned big tables?Yes, that's about right. A lot of this depends on exactly what happens in various "oops" scenarios-- are you, for example, just burning some extra CPU until someone comes to the DBA and says "my query is slow" or does saturating the network have some knock-on effect on critical apps or random long-running queries prevent some partition maintenance operations.
In my mind, the simplest possible solution (assuming you are using a fixed username in the database link) would be to create a profile on HGPAY for the user that is defined for the database link that set a LOGICAL_READS_PER_CALL value that was large enough to handle any "reasonable" request and low enough to quickly kill any session that tried to do something "stupid". Obviously, you'd need to define "stupid" in your environment particularly where the scope of a "simple reconciliation report" is undefined. If there are no political issues and you can adjust the profile values over time as you encounter new reports that slowly increase what is deemed "reasonable" this is likely the simplest approach. If you've got to put in a change request to change the setting that has to be reviewed by the change control board at its next quarterly meeting with the outsourced DBA vendor, on the other hand, you could turn a 30 minute report into 30 hours of work spread over 30 days. In the ideal world, though, that's where I'd start.
Getting more complex, you can use Resource Manager to kill queries that run too long on the wall clock. Since the network is almost certainly going to be the bottleneck, it's probably unlikely that the CPU throttling is going to do much good-- you can probably saturate the network with a very small amount of CPU. Network throttling in my mind is an extra step up in complexity again depending on the specifics of your particular situation and what you're competing with.
Justin -
Database Link Password Security
When using sqldeveloper it is possible to view passwords associated with database links. This is not possible to view when querying db_links or using Toad. How to view database link passwords do the following.
connections>your-connection>database links> click on a defined db_link > view the "sql tab" to see the source that creates the db_link
The database user can only view the database links that user owns. This is an issue if a production database is cloned to a test/dev instance and the db_links are not dropped or changed.
Listed below is an example of a user named 'APPS' and a db_link that user owns.
REM APPS APPS_TO_APPS.SOMEWHERE.COM
CREATE DATABASE LINK "APPS_TO_APPS.SOMEWHERE.COM"
CONNECT TO "APPS" IDENTIFIED BY "SOMEPASSWORD"
USING 'SOMEDATABASE';
------------While it is a security hole, it doesn't mean it is a bug. It is documented behaviour that existed in prior versions. It also goes down to the data files, so it isn't a matter of just patching the server software but changing (upgrading) the database (and in such a way that an unpatched set of software -maybe- couldn't work with a patched database).
This change is definately in the realms of UPGRADE rather than PATCH. While it probably could have been done as part of a dot release (eg 9.2.0.7 to 9.2.0.8) I think 9.2.0.8 is the terminal release for 9iR2 so if you want this, you're going to have to go a full version upgrade. -
Jdbc (oci8) and database link ?
hello,
i try to select * from dual@DBNAME within a jdbc connection.
1. we are connected with oci8 on a 9.2.0 database
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
String urlDefault = "jdbc:oracle:oci8:@DBM1.uvwendy";
String url = null;
2. then we prepare a statement
rset=dblink_stmt.executeQuery ("select name from v$database@"+Database_Server+"_"+Database_SID+".UVDBM");
while (rset.next ())
System.out.println (rset.getString (1));
} catch (SQLException e) {
System.out.println ("Error REMOTE SELECT ..." + e);
3. the error looks like this
select name from v$database@UVGENEVA_GENEVADB.UVDBM
Error REMOTE SELECT ...java.sql.SQLException: ORA-12154: TNS:could not resolve service name
but when we execute the same statement in the database self then it works fine.
the database link works fine.
has anybody an idea for this behaviour?
thank you very much,
wolfganghello,
i try to select * from dual@DBNAME within a jdbc connection.
1. we are connected with oci8 on a 9.2.0 database
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
String urlDefault = "jdbc:oracle:oci8:@DBM1.uvwendy";
String url = null;
2. then we prepare a statement
rset=dblink_stmt.executeQuery ("select name from v$database@"+Database_Server+"_"+Database_SID+".UVDBM");
while (rset.next ())
System.out.println (rset.getString (1));
} catch (SQLException e) {
System.out.println ("Error REMOTE SELECT ..." + e);
3. the error looks like this
select name from v$database@UVGENEVA_GENEVADB.UVDBM
Error REMOTE SELECT ...java.sql.SQLException: ORA-12154: TNS:could not resolve service name
but when we execute the same statement in the database self then it works fine.
the database link works fine.
has anybody an idea for this behaviour?
thank you very much,
wolfgang -
How to execute remote query by Oracle Database Link
I use Oracle Database Link to query data from SQL Server. The query is like:
select *
from tableA@DL_SqlServer a
join tableB@DL_SqlServer b
on a.ID = b.ID*
tableA and tableB is large and the result is relatively small. This query executes quickly in SQL Server since indexes are built both on the two tables. But it is very slow on Oracle Database Link to SQL Server.
I guess the join operation is performed on Oracle side not on SQL Server side, thus the indexes are not used. Since I just need the joined result, I prefer to perform the query entirely on SQL Server and get the small result only. But I have no privilege to create views on SQL Sevrer.
I konw that using SQL Server's linked server and OPENQUERY function can achieve this goal. I wonder how to do this on Oracle Database Link. Thanks!DO NOT DO THIS....specifically:
"select *
from tableA@DL_SqlServer a
join tableB@DL_SqlServer b
on a.ID = b.ID*"
You would be better off to do the following:
create a Materialized View in Oracle and once/day (or as frequently as you feel necessary) pull the data from SQLServer and then do the join locally by creating MV as TABLEA_MV and TABLEB_MV and then have views that have the REALTABLEA and REALTABLEB names that point to these MVs. This can be done without recompiling or changing your code. Trust me, I have seen this sort of thing in the past that completely crippled an IBM mainframe using DB2 along with a major network segment by having this sort of join via DB links. You must understand the ramifications of your "design" and I can tell you for certain that it is a very BAD!!! idea... Fix this before you are issuing another command: "alter DBA update resume/CV;"
The app went into production at 7AM. By 9:30AM, the mainframe had executed more than 10Billion I/O's. It took > 15hrs for the mainframe to recover once we shutdown the app and implemented the view/MV described above.
I will leave it as an excercise for the OP to develop the syntax for this.
Edited by: onedbguru on Feb 15, 2013 7:27 PM -
Using database-link in view to get around ORA-01031 error
I have been granted select rights on a users table. I am therefore able to select from his table. If however I try create a view against his table I run into the ORA-01031 problem. I have worked around this problem by creating a database-link to myself and then adding that to the view creation and it works. What are the downsides of using the database-link in this way?
The only down side I have been able to identify is that a extra session is created and that the CPU has a little extra work due to the LOOP BACK that takes place. I need to ensure the network is not unnessesarly used and therefore will need to ensure that 127.0.0.1 (local host) is used in the database connection discription. e.g.
create database link my_db_link connect to scott identified by tiger using '(description=(address=(protocol=tcp)(host=127.0.0.1) (Port = 1521) ) (connect_data= (sid=ora10g)))'; -
ERROR WHILE CREATING A DATABASE LINK USING HETEROGENEOUS SERVICES
I'm creating a database link with the Oracle Dataware Builder, and i get the following error:
Probando...
Fallo.
SQL Exception
Error del repositorio: Excepción SQL.
Nombre de la Clase: CacheMediator.
Nombre del Método: getDDEntryFromDB.
Mensaje de Error del Repositorio: ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][Informix][Informix ODBC Driver][Informix]Incorrect password or user [email protected] is not known on the database server. (SQL State: 28000; SQL Code: -951)
ORA-02063: preceding 2 lines from PRUEBA_SEH
As you can see i'm using heterogeneus services to connect to a informix database. ALTIADM is a valid user for that database, i don't send my ip address 192.168.0.62, but the error says "[email protected] is not known in the database server". how can i solve it?????Right places to ask this question are
Heterogeneous Connectivity
Warehouse Builder -
ERROR WHILE CREATING A DATABASE LINK TO INFORMIX
I'm creating a database link with the Oracle Dataware Builder, and i get the following error:
Probando...
Fallo.
SQL Exception
Error del repositorio: Excepción SQL.
Nombre de la Clase: CacheMediator.
Nombre del Método: getDDEntryFromDB.
Mensaje de Error del Repositorio: ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][Informix][Informix ODBC Driver][Informix]Incorrect password or user [email protected] is not known on the database server. (SQL State: 28000; SQL Code: -951)
ORA-02063: preceding 2 lines from PRUEBA_SEH
As you can see i'm using heterogeneus services to connect to a informix database. ALTIADM is a valid user for that database, i don't send my ip address 192.168.0.62, but the error says "[email protected] is not known in the database server". how can i solve it?????Right places to ask this question are
Heterogeneous Connectivity
Warehouse Builder
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