Database-Link to MSSQL-Problem

Hello,
I created a database-link to MSSQL using Transparent Gateways!
When I try a select on a table with over 200 datasets I get the ORA-errors:
ORA-01002: FETCH....(closed CORSOR) and
ORA-02063: Preceding line from VIDEOTHEK (which is my databaselink)
How comes?
Would You give me a hint?
Best regards
MArlon

Ora-1002 normally occures while using a cursor that fetches the records from a remote database and having a commit somewhere in the code. The commit will close all open cursors to the foreign database and you need to open it again in case you want to use the cursor again.

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You could load the SQL Server Type 4 JDBC driver into the Oracle JVM and then write a Java stored procedure that accesses the remote database if you would like. But Heterogeneous Services with Generic Connectivity, which allows you to create database links to non-Oracle databases, only supports ODBC and OLE DB.
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ORA-28545 on mySQL - Oracle database link

Hi All,
I'm trying to make a connection to mySQL database from oracle.
Oracle database runs on windows 2003 64 bit machine and version is 10.2.0.4.0.
my init<dbname>, listner and tnsnames looks like this and I can create database links without any problem at all. Also oracle to oracle database links are working fine on that machine as well.
HS_FDS_CONNECT_INFO=BOOKDB
HS_FDS_TRACE_LEVEL=debug
BOOKDB=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522))
(ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY)))
SID_LIST_BOOKDB=
(SID_LIST=
(SID_DESC=
(SID_NAME=BOOKDB)
(ORACLE_HOME=C:\oracle\product\10.2.0\db_1)
(PROGRAM=hsodbc)
BOOKDB=
(DESCRIPTION=
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    (CONNECT_DATA=(SID=BOOKDB))
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C:\Documents and Settings\adminkh>lsnrctl start bookdb
LSNRCTL for 64-bit Windows: Version 10.2.0.4.0 - Production on 20-JUL-2010 12:01:40
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Starting tnslsnr: please wait...
TNSLSNR for 64-bit Windows: Version 10.2.0.4.0 - Production
System parameter file is C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
Log messages written to C:\oracle\product\10.2.0\db_1\network\log\bookdb.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522))
STATUS of the LISTENER
Alias                     bookdb
Version                   TNSLSNR for 64-bit Windows: Version 10.2.0.4.0 - Production
Start Date                20-JUL-2010 12:01:42
Uptime                    0 days 0 hr. 0 min. 3 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
Listener Log File         C:\oracle\product\10.2.0\db_1\network\log\bookdb.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
Services Summary...
Service "bookdb" has 1 instance(s).
Instance "bookdb", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
C:\Documents and Settings\adminkh>tnsping bookdb
TNS Ping Utility for 64-bit Windows: Version 10.2.0.4.0 - Production on 20-JUL-2010 12:02:16
Copyright (c) 1997, 2007, Oracle. All rights reserved.
Used parameter files:
C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522)) (CONNECT_DATA=(SID=bookdb)) (HS=OK))
OK (10 msec)And then I create the database link and it created without a problem.
create database link booklink connect to bookuser identified by ITDepartment using 'BOOKDB';And then I try to run small query.
SQL> select * from admins@booklink;
select * from admins@booklink
ORA-28545: error diagnosed by Net8 when connecting to an agent
Unable to retrieve text of NETWORK/NCR message 65535
ORA-02063: preceding 2 lines from BOOKLINKSo can anyone help me with regards to this error.
Edited by: garuka on Jul 20, 2010 4:08 AM
Edited by: garuka on Jul 20, 2010 4:09 AM

listner.ora from 11g
BOOKDB=
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     (ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522))
     (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY)))
SID_LIST_BOOKDB=
     (SID_LIST=
     (SID_DESC=
     (SID_NAME=BOOKDB)
     (ORACLE_HOME=C:\Oracle11g\product\11.2.0\tg_1)
     (PROGRAM=hsodbc)
     )status:
C:\Oracle11g\product\11.2.0\tg_1\bin>lsnrctl status bookdb
LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 20-JUL-2010 15:35:34
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522))
STATUS of the LISTENER
Alias                     bookdb
Version                   TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date                20-JUL-2010 15:34:51
Uptime                    0 days 0 hr. 0 min. 43 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\Oracle11g\product\11.2.0\tg_1\network\admin\listener.ora
Listener Log File         c:\oracle11g\product\11.2.0\tg_1\log\diag\tnslsnr\khhq-xs-ifsb01\bookdb\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.16.72.176)(PORT=1522)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
Services Summary...
Service "bookdb" has 1 instance(s).
Instance "bookdb", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfullyEdited by: garuka on Jul 20, 2010 7:42 AM

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 ;)

Problem with using database link from oracle 7 to oracle 9i

Hi To Every One
I have two oracle database oracle 7.3.4.0.1 and oracle 9i 9.2.0.1.0.
and the tns alias to connect to oracle 9i database is oracle9i and tns
alias to oracle 7 database is oracle7.I have no problem in connect to
these database using these tns aliases from either database.The tns
alias for oracle 7 is available in tnsnames.ora file of oracle9i and
tns alias for oracle 9i is available in tnsnames.ora file of oracle 7.
So there is no connection problem from each other.Connection is
working fine for each other but the problem with database links is
like this
Problem:
when i create database link from oracle9i user or public database link
from oracle9i for oracle7 user like this
SQL ORACLE9I >CREATE DATABASE LINK ORACLE7 CONNECT TO <ORACLE7USER>
IDENTIFIED BY <PASSWORD> USING 'ORACLE7';
OR
SQL ORACLE9I >CREATE PUBLIC DATABASE LINK ORACLE7 CONNECT TO <ORACLE7USER>
IDENTIFIED BY <PASSWORD> USING 'ORACLE7';
The links get created sucessfully but when i write command like
SQL ORACLE9I> DESC <ORACLE7USER_NAME>.<ORACLE7USER_TABLENAME>@ORACLE7
I RECEIVE A ORACLE ERROR LIKE
ORA-12663 SERVICE REQUIRED BY CLIENT IS NOT AVAILABLE ON THE SERVER.
OR IF MY COMMAND IS LIKE
SQL ORACLE9I> SELECT <FEILD_NAME> FROM
<ORACLE7USER_NAME>.<ORACLE7USER_TABLENAME>@ORACLE7;
I RECEIVE AN ORACLE ERROR LIKE
ORA-01002 FETCH OUT OF SEQUENCE.
ORA-02063: preceding line from ORACLE7
BUT IF I CREATE A LINK FROM ORACLE7 USER FOR ORACLE9I USER
IT WORKS FINE.
PLZ HELP ME WHAT IS THE PROBLEM THAT THE LINK FOR ORACLE 7 IS NOT WORKING WHEN
IT IS BEING CREATED FROM ORACLE9I.
Thank u.

Oracle 9.2.0 does not support connectivity to Oracle 7. The newest version that will support this is 9.0.1.

Problems in using database link

Hi all,
I have problems in using the following created database link:
Name: fzanalyze
User: fzanalyze
PWD: xxx
Host: fz.domain.com
I get the following error message, if I try to start this select:
select * from tab@fzanalyze;
FEHLER in Zeile 1:
ORA-12154: TNS:Couldn't resolve service name
The problem, the TNS is correct, because I copied the hoststring from the tnsnames.ora. Also I can connect to the database by using the given hostname as follows:
connect fzanalyze/[email protected]
connected
What could be the problem, the I get the tns-Error, although I can connect normal to the database??
Thanks for helping
Dana

Dana,
Unlike Kamal, I don't use SQLNET anymore (isn't it obsolete from 8i+?), so I don't have any sqlnet.ora on my client or server.
I'm not really a sysop, so no clever thoughts behind the following ideas, I just use these for development purposes at home:
IP range at home = 192.168.x.x segment (another router server connects to the internet)
Oracle server computer name = dbserver.seinpost.nl (local address = 192.168.1.110)
instance entry in $TNS_ADMIN/listener.ora @ server:
    (SID_DESC =
      (GLOBAL_DBNAME = inst04.seinpost.nl)
      (ORACLE_HOME = /u01/app/oracle/product/10.1.0/db_1)
      (SID_NAME = inst04)
    )instance entry in $TNS_ADMIN/tnsnames.ora @ server:
INST04.SEINPOST.NL =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = dbserver.seinpost.nl)(PORT = 1521))
    (CONNECT_DATA =
      (SERVICE_NAME = inst04.seinpost.nl)
)instance entry in tnsnames.ora @ client:
INST04 =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS =
        (PROTOCOL = TCP)
          (HOST = 192.168.1.110)
            (PORT = 1521)
    (CONNECT_DATA =
      (SERVICE_NAME = inst04.seinpost.nl)
)So again, no sqlnet.ora and as you can see only on my client I use local IP addresses to prevent my client for searching the internet for the non-existing dbserver.seinpost.nl address
Hope this helps,
Michiel

I have a problem when update tables with a database link (APEX)

Hi, I search answers for my problem and I not found a solution. My problem start when I open page with database link statement in APEX. I drop tables and execute this for update the tables in APEX.
EXECUTE IMMEDIATE 'CREATE TABLE XXXXXXX
AS
SELECT A1,A2,A3
FROM AAA@BBB';
I use Mozilla Firefox and isn't always updated the tables because it shows dialog for downloading file "f". I rename the file to txt and I see the text "IBMPC/WIN_NT-8.1.0"...
In the explorer always show a window only the text "IBMPC/WIN_NT-8.1.0"...
What is the solution for my problem? I need update this tables.
Thanks. John.

It's easy. It doesn't work a database link, on apex, with a pl/sql code or store procedure.
I saw that many people had the same problem but I don't see a solution.
As I put up, I want to remove my tables on APEX and copy the table of my Oracle database with the update dates.
The posts are from the same problem as my English is very bad, it got to help explain the problem.
I have a page with a pl/sql code. This code in Oracle is correctly.
For example, with this code I update the table PRUEBAS with the data of TABLEX.
BEGIN
BEGIN
EXECUTE IMMEDIATE 'DROP TABLE "PRUEBAS"';
EXCEPTION WHEN OTHERS THEN NULL;
END;
EXECUTE IMMEDIATE 'CREATE TABLE "PRUEBAS"
AS
SELECT AAA,
BBB,
CCC
FROM TABLEX';
END;
But, in this code, I have the problem.
BEGIN
BEGIN
EXECUTE IMMEDIATE 'DROP TABLE "PRUEBAS"';
EXCEPTION WHEN OTHERS THEN NULL;
END;
EXECUTE IMMEDIATE 'CREATE TABLE "PRUEBAS"
AS
SELECT AAA,
BBB,
CCC
FROM TABLEX@DB_LINK';
END;
I sometimes get an error. Sometimes it works fine, but half of the tries Apex returns "IBMPC/WIN_NT-8.1.0" in the browser and I am not using an IBM PC or Win NT...
And i read that In the alert_xe.log file there are a error of core dump... ... :S or that the application return corrupt headers.... Is a problem of versions?
I used a synonym and I have the same problem.
Even if I run the code on SQL COMMANDS (SQL WORKSHOP) it shows dialog for downloading file "f". I rename the file to txt and I see the text "IBMPC/WIN_NT-8.1.0"...
The problem is in Mozilla Firefox and in IE.
I have the OracleXE 10g (Application Express 3.0.1.00.08).
And the question is.. ... ... ... ... What is the solution? :)
Thanks.
John.

ORACLE 11g + PHP5 problem: "fetch out of sequence" on remote database link

Hi!
I have a new server with oracle 11g (11.1.0.7) database and apache/php5 (actual build) on linux.
connection type is dedicated.
when doing a connection to a remote AS/400 database I always get this error:
"Warning: oci_fetch_array() http://function.oci-fetch-array: ORA-01002: fetch out of sequence ORA-02063: preceding line from..."
when doing the same simple "select * from database link" at my old server with oracle 9i and apache/php5 no problem occurrs.
this happens at AS/400 database link only. normal oracle database links work fine.
Anyone an idea how to solve this problem or where the problem is????
further info:
when doing " select * from [ database link ] where rownum < 11 " it works, but when doing the query with more than 10 results I get the error. Any idea?
bye,
Oliver
Edited by: user501548 on 10.10.2008 02:20

well a fetch out of sequence usually indicates that a cursor has been closed before the process has finished fetching or some such thing.
I'm not aware of there being a specific problem with the situation you outline, but maybe if you could provide all the connection setup and how you are trying to connect that may give a better idea.
Also, you may be better asking on the General Database Discussions forum as this isn't really a SQL or PL/SQL problem

Problems with query via Database-Link (Oracle 7.3.4)

I made the following simple query via database-link.
select count (*) from [email protected]
I got the result in about 200 miliseconds.
Then I4ve tried the following query.
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So I made another choice
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So I made the query again an changed only the number of rownums,until I was at rownum <=8
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We made the same things from another server with the same database-link on the same remote server
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Any Idea???

No, network is OK!
Other links are running, I have also no problems when I connect directly to the remote server.

Problem with making a database link.

Hello All
I got a problem with making a database link.
When I execute this query
CREATE PUBLIC DATABASE LINK DBNAME
CONNECT TO database IDENTIFIED BY name
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I am using other names because its private information
But when I look at the table dba_db_links I see this
OWNER | DB_LINK | USERNAME |HOST
PUBLIC| DBNAME.europe.company.com| name| DBNAME.europe.company.com
So the DB_Link name is changed. And this causes a problem with my asp website. I get the fault message
ORA-02085: database link DBNAME.europe.company.com connects to DBNAME
Cause: a database link connected to a database with a different name. The connection is rejected.
The global_names = true and I prefer to keep it that way.
So does anyone knows what is wrong about my Query or how I can change the DB_Link name.
Thanks for the support,
Remco

Thanks for the help Mohit
But thats whats I was doing.
The query in the first post is the same as what you are posting.
But by an (for me) unknown reason the database converts DBNAME to DBNAME.europe.company.com

Problem connecting DataBase Link from windows oracle to oracle on Linux

I'm facing a problem with database links from windows oracle to Oracle hosted on Linux server.
I'm able to successfully create the Database Link using the following query on oracle database hosted on a windows server
CREATE DATABASE LINK SampleDB
CONNECT TO myuser IDENTIFIED BY password
USING 'sample';
The tns names entry on windows for database in Linux server is as follows
DSOFT =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.100)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = sample)
But while executing the query "select count(*) from doctor@SampleDB;" in sql developer on windows, I'm getting the following error
SQL Error: ORA-12154: TNS:could not resolve the connect identifier specified
12154. 00000 - "TNS:could not resolve the connect identifier specified"
*Cause: A connection to a database or other service was requested using
a connect identifier, and the connect identifier specified could not
be resolved into a connect descriptor using one of the naming methods
configured. For example, if the type of connect identifier used was a
net service name then the net service name could not be found in a
naming method repository, or the repository could not be
located or reached.
Using the above tns entries, i'm successfully able to connect to the database in Linux server through sql developer installed on the windows machine. Then why i'm getting this error while executing the query on Database Link?. Can any one help me?

1005745 wrote:
I'm facing a problem with database links from windows oracle to Oracle hosted on Linux server.
I'm able to successfully create the Database Link using the following query on oracle database hosted on a windows server
CREATE DATABASE LINK SampleDB
CONNECT TO myuser IDENTIFIED BY password
USING 'sample';
The tns names entry on windows for database in Linux server is as follows
DSOFT =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.100)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = sample)
But while executing the query "select count(*) from doctor@SampleDB;" in sql developer on windows, I'm getting the following error
SQL Error: ORA-12154: TNS:could not resolve the connect identifier specified
12154. 00000 - "TNS:could not resolve the connect identifier specified"
*Cause: A connection to a database or other service was requested using
a connect identifier, and the connect identifier specified could not
be resolved into a connect descriptor using one of the naming methods
configured. For example, if the type of connect identifier used was a
net service name then the net service name could not be found in a
naming method repository, or the repository could not be
located or reached.
Using the above tns entries, i'm successfully able to connect to the database in Linux server through sql developer installed on the windows machine. Then why i'm getting this error while executing the query on Database Link?. Can any one help me?A database link is acting as a client to the target, remote database in exactly the same fashion and using exactly the same tns infrastructure as any other client trying to connect to that remote database. your ORA-12154 when querying a db link means exactly the same as if you had gotten it trying to connect with sqlplus, from the same server. Check the link SB provided. Keep in mind that the tnsnames file of concern is the one on the source database server.

Problem when call store procedure over a database link

Hi all,
I've create a database link in server "EAST" similar like:
CREATE DATABASE LINK db_link CONNECT TO tiger IDENTIFIED BY scott USING 'abc';
and from server "EAST" i ran the procedure located in server "WEST" somethin like:
exec testing_procedure@db_link('test');
testing_procedure is look like:
Create or Replace procedure testing_procedure (p_testing in varchar2)
as
cursor check_space is
select sum(bytes)/1024/1204 tb_size
from dba_data_files;
my_check_space%ROWTYPE;
begin
open check_space;
loop
fetch check_space into my_check_space;
exit when check_space%NOTFOUND;
insert into test_tf@db_link (test, tb_value) values
(p_testing, my_check_space.tb_size);
end loop;;
close check_space;
end;
and my problem is when i'm run procedure from "EAST" server, the values in test_tf table is the same as when you run that procedure from "WEST" server. I've check the size for both server "EAST", and "WEST" by select sum(bytes)/1024/1204 command. And the value is completely different. And i guest somehow it reuse the value of "WEST" server no matter when you run that procedure in "EAST" server. Any suggesttion, please give me some advices.
Thanks,
Kevin

If this procedure is in WEST server then even if you call it from some another planet using db link, the cursor inside the procedure will fetch the data from that server only means WEST server. So "select sum(bytes)/1024/1204 tb_size
from dba_data_files;" statement in your procedure always fetch the size of the datafiles belongs to the WEST database.
If you want to store the data of two different databases then you have to create the similar procedure in EAST database also.
BTW, you said the you created a database link "db_link" in EAST database to point to WEST database and on WEST database you have that procedure BUT I don't understand why r u using "db_link" in your procdure code in WEST server in this insert statement:
insert into test_tf@db_link (test, tb_value) values
(p_testing, my_check_space.tb_size);Is there a database link on that box also?? Where it is pointing to?? And if not then this code should not be compiled.
Daljit Singh

Database Link. Problem in Forms. Baffled!

Hoping someone can help.
I'm working on a system that has a form on it with a problem. Although there is a currently compiled and working version of this form available, I cannot get it to compile.
The situation is this.
There are 2 databases, MINX a 9i database, and PROD an APPS 11i database.
On the database PROD exists a view called MTL_ITEM_CATEGORIES_V.
SELECT is granted on this to the APPSINQ user.
On the database MINX exists a public synonym MTL_ITEM_CATEGORIES_V, which points at the view MTL_ITEM_CATEGORIES_V on the PROD database by way of a public database link, also called PROD. The database link uses the APPSINQ user on the PROD database.
(once the set_org_context, and nls_language have been set)
From SQL on the MINX database, I can select from the public synonym, MTL_ITEM_CATEGORIES_V, and rows are successfully returned from the MTL_ITEM_CATEGORIES_V view on the PROD database. This is all ok and good.
However, in the main form, is a trigger which does a select from the public synonym and this will not compile.
I get the error : identifier 'CATEGORY_SET_ID' must be declared.
It's like it can't see the category_set_id column in the view. However, if I create a new block, and base it on the public synonym, the category_set_id column is there for me to choose. Meaning that forms CAN see the column.
Am baffled! Anyone ??

Hi
I´ve got some problems with synonyms and dblinks in forms too. Try creating a local view based on the remote view usign the dblink (do not use the public synonym) and try to compile again.
I think in some cases the compiler gets lost trying to follow synonyms and links. a forms bug maybe?

Problem using external database link.

Help:
Here is th problem I am having. I have a workflow that reads and writes to external datasource using HS services. The workflow reads and then writes to the HS datasource in a function. After the function completes it needs to close the database link. You cannot close the database link until the commit happens, which you cannot do in a function or you get an error. This is a catch 22. Do you have any suggestions?
Thanks

Hi,
You could invoke your function as an autonomous transaction, and do a commit there. Not sure if that helps you close the database link or not.
Alternatively, you could package the data to be transferred into a message on an AQ and propagate that data across the database link to the workflow system, and process it asynchronously.
HTH,
Matt
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Database-Link to MSSQL-Problem

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