Query to find database links of a user

hi all,
can anyone please help me in finding out thro a query that how many database links are associated with a user.

select * from dba_db_links where owner = 'Bill Gates';

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Query to find out the list of user who have delete access

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I need a query to find out the list of users who have delete access on perticular folder/universe/ reports in infoview.
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orton607 wrote:
thanks for replying guys. But the thing is i am using dynamic sql execute immediate in my package, so i want those tables also and the schema name.
thanks,
ortonThis is not possible. The best you could do is to have a good guess.
Or how would you parse some dynamic statement as this:
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   execute_immediate(v_sql);
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Better rewrite all dynamic SQL statements into non dynamic ones. Or do the source control logic for those dynamic parts in an extra module. For example implement your own dependency table and force every developer to add there all dynamic parts.

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Creating a Database link for a user

Hello All,
I am trying to create a database link for one of my users.
When I create it as sysdba the link gets created in the SYS schema which tells me that my syntax is working/fine.
But when I ALTER my SESSION and set my CURRENT_SCHEMA = <USER_NAME> I get ORA-00990: missing or invalid privilege
So I tried granting the user CREATE DATABASE LINK, CREATE PUBLIC DATABASE LINK, and DROP PUBLIC DATABASE LINK.
Same error.
Any ideas what I am missing?
Thanks,
Craig

CraigBoyd wrote:
Hello All,
I am trying to create a database link for one of my users.
When I create it as sysdba the link gets created in the SYS schema which tells me that my syntax is working/fine.
But when I ALTER my SESSION and set my CURRENT_SCHEMA = <USER_NAME> I get ORA-00990: missing or invalid privilege
So I tried granting the user CREATE DATABASE LINK, CREATE PUBLIC DATABASE LINK, and DROP PUBLIC DATABASE LINK.
Same error.
Any ideas what I am missing?
Thanks,
Craigyou need to create a new session after the GRANT was issued.

Variable database name in SQL Server query using Oracle database link

Hi All,
I have an ApEx 4.1 app running on 11g x64 (11.2.0.1) on Windows Server 2008 x64, and I have some data integration points with a SQL Server (2005 and 2008) that I need to establish. I have configured the database link with dg4odbc and it works beautifully... I can execute queries against the SQL Server database without any problems using the database link.
However, there is a scenario where the SQL Server database name is dynamic, and I need to generate it on the fly in a PL/SQL block, and then use that in a dynamic SQL query (all of this in ApEx). This is where I run into problems... when I am querying the default database based on the ODBC connection and I don't have to specify the database name, there is no issue. But when I need to access one of several other non-default databases, I keep receiving the "invalid table" error.
This runs fine:* (note that "fv" is the name of my database link)
v_query1 := 'select "ReleaseDate" from dbo.Schedules@fv where dbo.Schedules."SchedID" = :schedule';
EXECUTE IMMEDIATE v_query1 into rel_date using schedule;
I then take that rel_date variable, convert to a varchar2 (rel_date_char), and then use it as the database name in the next query...
This returns an error_ (Error ORA-00903: invalid table name)
v_query2 := 'select "PARTNO" from :rel_date_char.dbo.ProdDetails@fv where "SchedID" = :schedule and "UnitID" = :unit
and "MasterKey" = :master and "ParentKey" = :parent';
EXECUTE IMMEDIATE v_query2 into part_number using schedule, unit, master, parent;
I have also tried using all of the following to no avail:
'select "PARTNO" from ' || :rel_date_char || '.dbo.ProdDetails@fv where "SchedID"...
'select "PARTNO" from ' || rel_date_char || '.dbo.ProdDetails@fv where "SchedID"...
'select "PARTNO" from ' || @rel_date_char || '.dbo.ProdDetails@fv where "SchedID"...
'select "PARTNO" from @rel_date_char.dbo.ProdDetails@fv where "SchedID"...
Is there a way to do this in PL/SQL?
Thanks for any help!
-Ian C.
Edited by: 946532 on Jul 15, 2012 7:45 PM

Just did a test using passthrough:
SQL> set serveroutput on
SQL> declare
2 val varchar2(100);
3 c integer;
4 nr integer;
5 begin
6 c:= dbms_hs_passthrough.open_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3;
7 dbms_hs_passthrough.parse@FREETDS_DG4ODBC_EMGTW_11_2_0_3 (c, 'select count(*) from EMP');
8 LOOP
9 nr:= DBMS_Hs_Passthrough.fetch_row@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
10 exit when nr=0;
11 dbms_hs_passthrough.get_value@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c,1,val);
12 dbms_output.put_line(val);
13 end loop;
14 dbms_hs_passthrough.close_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
15 end;
16 /
24576
PL/SQL procedure successfully completed.
SQL> declare
2 val varchar2(100);
3 c integer;
4 nr integer;
5 begin
6 c:= dbms_hs_passthrough.open_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3;
7 dbms_hs_passthrough.parse@FREETDS_DG4ODBC_EMGTW_11_2_0_3 (c, 'select count(*) from dbo.EMP');
8 LOOP
9 nr:= DBMS_Hs_Passthrough.fetch_row@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
10 exit when nr=0;
11 dbms_hs_passthrough.get_value@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c,1,val);
12 dbms_output.put_line(val);
13 end loop;
14 dbms_hs_passthrough.close_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
15 end;
16 /
24576
PL/SQL procedure successfully completed.
So all 3 ways work for me.
Edited by: kgronau on Jul 23, 2012 10:08 AM
Now using variables to perform the select:
SQL> declare
2 val varchar2(100);
3 c integer;
4 nr integer;
5 tabname varchar2(20) :='EMP';
6 ownr varchar2(20) :='dbo';
7 dbname varchar2(20) :='gateway';
8 begin
9 c:= dbms_hs_passthrough.open_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3;
10 dbms_hs_passthrough.parse@FREETDS_DG4ODBC_EMGTW_11_2_0_3 (c, 'SELECT count(*) FROM '||dbname||'.'|| ownr || '.'||tabname||'');
11 LOOP
12 nr:= DBMS_Hs_Passthrough.fetch_row@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
13 exit when nr=0;
14 dbms_hs_passthrough.get_value@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c,1,val);
15 dbms_output.put_line(val);
16 end loop;
17 dbms_hs_passthrough.close_cursor@FREETDS_DG4ODBC_EMGTW_11_2_0_3(c);
18 end;
19 /
24576
PL/SQL procedure successfully completed.
=> instead of executing the statement using "execute Immediate" we have to use PASTHROUGH package to pass the statement to the SQL Server.
Edited by: kgronau on Jul 23, 2012 10:10 AM

Same sql query with multiple database links

Hi All,
i want to execute an sql query for a SELECT LIST Item. which should use database links in it's query.
i'm having a list of database links in the region. say :LOC which is having 10 items each linking to different databases.
i want to use following query for another item in same page.
select customer_name from working_lines@:LOC where
phone_no:phone_no
can i do this.
Thank you All.

What we have done before is to create a report based on a PL/SQL procedure that returns a SQL statement.
The PL/SQL code grabs the "selected" database link from :LOC and parses the SQL QUERY you want to execute replacing some token (like [LINK]) with '@DBNAME'.
Lets say your SQL statement is coded like this:
mySQL := 'SELECT cust_name FROM working_lines[LINK] where phone_no = :Phone;'
Then all you would have to do to replace '[LINK]' with the proper DB alias would be:
mySQL := REPLACE(mySQL, '[LINK]', '@'||:LOC);
and then return the new SQL ...
if :LOC has something like 'V10GPROD' your SQL would look like :
SELECT cust_name FROM working_lines@V10GPROD where phone_no = :Phone;
The beauty of this is that you can also include a "null" option that means the select statement will be executed on THIS database...
Doug

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

ORACLE E-BUSINESS SUITE 11i Query to find users who never logged in

Dear, All -
ORACLE E-BUSINESS SUITE 11i
Is there a query to find out a list of users who were created but never logged into the system. I believe these users do no appear in FND_USER table since they never logged in.
Thanks in advance!

FAIRE wrote:
Dear, All -
ORACLE E-BUSINESS SUITE 11i
Is there a query to find out a list of users who were created but never logged into the system. I believe these users do no appear in FND_USER table since they never logged in.
Thanks in advance!All application users details are stored in FND_USER table (whether they logged in or not).
To find the list of those users, please run this query:
SQL> select *
from FND_USER
where LAST_LOGON_DATE is NULL
and END_DATE is NULL;Thanks,
Hussein

Version 1.5: "Other Users" does not show database links

When logged in as System (even as SysDba), and viewing "Other Users", it doesn't show any database links for the users. I can only see them if I log in as that user. Is this a bug?
Thanks,
Rich

This is also happening with table GRANTS.
Thanks,
Richard

Error in database link(ORA-02063 and ORA-02391)

Hi
database link was working fine till this morning. now when i try to query using the database link, i get the following error
ORA-02391: exceeded simultaneous SESSIONS_PER_USER limit
ORA-02063: preceding line from RMSLIVE
It would beof great help if you can advise why this error is occuring.
many thanks.

The error stack is quite obvious.
Either, the profile, with which the database user on remote database is running, must be modified to allow more connections or investigate the session leak in the application talking over database links.

Unable to execute Map from Database link

Hi
Been trying to research this issue but have had no luck in finding an answer. Here is the situation:
We have an apex application that resides on database "A"
Our OWB Design Repository (11.1.0.7) and Runtime Environment both exist on database "B"
Maps exists and execute under normal procedures as the "ETL" user on database "B", However we would like to allow the "APEX" user to execute a map from database "A" across a database link to a user that can execute the map without any issue.
When we try to execute the map across the database link from toad or sqlplus we get no error returned, the procedure runs and kicks off a map execution (as seen in ALL_RT_AUDIT_EXECUTIONS) or from the control center executions. However the Map execution immediately fails with no explanation as to why??
what makes even less sense is that the user on database "B" that the database link connects to.. can execute the same procedure all day long if logged directly into database "B".. but the moment you try to call it across the database link.. it errors with no message as to why.
We are calling the "WB_WORKSPACE_MANAGEMENT.SET_WORKSPACE".. so that is not the issue.. I am assuming this is either a bug.. or we are missing an additional call/privilege. The user for the database link is a registered user in the workspace, obviously this works since the database link user can run the procedure if logged in locally to database "B"
Any thoughts???

Figured out our problem..
Found RETURN_CODE column in ALL_RT_AUDIT_EXECUTIONS table.. point to -2064 which is an ora-2064
NOTE 1026597.6 - CALLING REMOTE PACKAGE RECEIVES ORA-2064 explains that a commit is issued in a coordinated session from an RPC procedure call with OUT parameters or function call. Action: simplify remote update statement.
The problem here is that "Commit Control" was set to Automatic for the mappings we were calling. Oracle does not like when a transaction is initiated on database "A" and has a commit issued on database "B" from the map.
Makes sense.. we switched the commit control to "Manual" and are able to process correctly by issuing a commit from the session on database "A"
Hope this helps anyone that runs into this issue themselves..

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

ORA-12154 when using Database Link

We're running 11r2 on our servers. I have a primary db and a standby db, using Data Guard. The standby is open for read-only querying. We are not using ASM.
The primary (and thus the standby) have a PUBLIC database link to a third db server.
When I run a query against the database link on the primary: select * from test@MyDBlink; Everything works fine.
When I run the same query against the database link on the standby: select * from test@MyDBlink; I get ORA-12154: TNS:could not resolve the connect identifier.
I check that the db link exists on the standby. It does.
I go to command prompt on the standby and run "tnsping MyDBlink". It executes fine. It says "Used TNSNAMES adapater to resolve the alias" and sure enough, MyDBlink is referenced in the TNSNAMES.ORA.
I also run "tnsping IP-of-MyDBlink" to doublecheck. No issues.
What is going on that is blocking the db link on the standby? Many reports utilize that standby and I'd hate to deny them the functionality of a db link.
Thanks

893968 wrote:
We're running 11r2 on our servers. I have a primary db and a standby db, using Data Guard. The standby is open for read-only querying. We are not using ASM.
The primary (and thus the standby) have a PUBLIC database link to a third db server.
When I run a query against the database link on the primary: select * from test@MyDBlink; Everything works fine.
When I run the same query against the database link on the standby: select * from test@MyDBlink; I get ORA-12154: TNS:could not resolve the connect identifier.
I check that the db link exists on the standby. It does.
I go to command prompt on the standby and run "tnsping MyDBlink". It executes fine. It says "Used TNSNAMES adapater to resolve the alias" and sure enough, MyDBlink is referenced in the TNSNAMES.ORA.
I also run "tnsping IP-of-MyDBlink" to doublecheck. No issues.
What is going on that is blocking the db link on the standby? Many reports utilize that standby and I'd hate to deny them the functionality of a db link.
ThanksMost people with this problem don't understand that the dblink is just another client, no different than sqplus running on the same machine - and therefore the link uses the tnsames in the ORACLE_HOME of the database containing the link. But it seems from the steps you've described that you've grasped that. The only thing I can think of off the top of my head is when you try sqlplus from the standby server you are hitting a different tnsnames than the one the database is using.

APP-RG-09518: An error occurred while creating a database link

Hi All,
While creating a database link in Oracle EBS from one instance to another instance for transferring FSG reports
Go to Any GL Setup responsibility...Setup>System>Database links > Create new database link
Prior to the above...below steps should be done on the server.
1.grant create database link to <apps.user>; (on db server)
2.source tns entry should be in destination tns file and destination tns entry in source tns file. (check tnsping after entry)
3.*make sure destination tns entry of 8.0.6 oracle home should be in source tns file* (Because we are creating db link for the application)
4.Run the Program FSG Report.
Regards,
Harish Muramshetty.

Hi,
I have solved the issue as below:
This error was started when I install a software which I have made myself and it uses sql server compact edition 3.5.
I saw when I manually replaced the sql related files from "C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5" with the files which my software setup had "version 3.5.5386.0" then the error started. And if copy back the latest version 3.5.8080.0
then it disappear. So use latest sql files in your software too.
My software was replacing the the latest files with older version.
Muhammad Arshad Awan

Query to find database links of a user

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