DELETE in dblink on 10g

Hi,
on 10g we have created DBLINKS toward some other DBs. Insert in remote tables using DBLINK is enough fast but the deletes are very slow. Any idea ? Any oracle bugs for DBLINK in 10g ?
Thanks.

user522961 wrote:
Thank you justin.
We can have more information from client but the question is that if there is any known bug on DELETE via DBLINK in ORACLE 10g.I am sure that if you scour Metalink, you will find at least one bug that involves a database link and a DELETE statement on whatever version of Oracle you are using (10g might mean 10.1.0.2 or 10.2.0.4 or anything in between). It is relatively unlikely, however, that you are actually hitting a bug. It is substantially more likely that you are encountering the far more common situation of a complex system not behaving the way you would want, in which case the information I asked for will help narrow down the source of the problem. Distributed DML is always extremely difficult for the optimizer to handle, so any performance issues that involve distributed queries make me suspect that the optimizer has made a poor decision.
Justin

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create table temp ( col1 number(2) , col2 number(2) , col3 number(2));
insert into temp values ( 1,2,10);
insert into temp values ( 1,2,20);
insert into temp values ( 1,2,30);
insert into temp values ( 3,2,10);
insert into temp values ( 3,4,12);
insert into temp values ( 3,4,45);
commit;
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1 2 10
1 2 20
1 2 30
3 2 10
3 4 12
3 4 45
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COL1 COL2 COL3 LEAD(ROWID)OVER(PA
1 2 10 AAAVBjAApAAAFyGAAB
1 2 20 AAAVBjAApAAAFyGAAC
1 2 30
3 2 10
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3 4 45
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AAAVBjAApAAAFyGAAB 1 2 20
AAAVBjAApAAAFyGAAC 1 2 30
AAAVBjAApAAAFyGAAD 3 2 10
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AAAVBjAApAAAFyGAAF 3 4 45
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ORACLE_HOME=..
NLS_LANG=..
NLS_DATE_..
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ORA_NLS33=..
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BI Blog: http://oraclebi.blogspot.com/
DM Blog: http://oracledmt.blogspot.com/
BI on Oracle: http://www.oracle.com/bi/
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BI Blog: http://oraclebi.blogspot.com/
DM Blog: http://oracledmt.blogspot.com/
BI on Oracle: http://www.oracle.com/bi/
BI on OTN: http://www.oracle.com/technology/products/bi/
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Can't uninstall or reinstall oracle 10g express edition in w/server 2003

Hi,
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Thanks

Hi,
Perform the following steps, this will solve your problem and can go with new installation. :-)
(Only perform the steps 7.2 section and here is the link : http://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25143/toc.htm#BABDJDCD
Manually Removing Oracle Database XE
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Step 2: Remove the Oracle Database XE Registry Editor Settings
Step 3: Update the System Variable Path
Step 4: Remove Oracle Database XE from the Start Menu and Desktop
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Follow these steps:
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2. If any of the following Oracle services exist and have the status Started, then select each of the services, and click Stop:
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OracleXETNSListener
OracleJobSchedulerXE
OracleXEClrAgent
OracleMTSRecoveryService
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Exit Services.
See also the Microsoft online help for more information on stopping services.
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Follow these steps:
1.
Log on to Windows with Windows administrative privileges.
2.
Ensure that you followed the instructions under "Step 1: Stop the Oracle Database XE Services" to stop the Oracle Database XE services.
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Start the Registry Editor at a command prompt:
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4.
Go to HKEY_CLASSES_ROOT.
5.
Delete the following keys:
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7.
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Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services.
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OracleXEClrAgent
OracleXETNSListener
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16.
Exit the Registry Editor.
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Edited by: user10888288 on May 3, 2010 5:58 AM

GROUP BY error executing a dblink querie on 11g

Hi all,
I would appreciate your help.
Thanks in advance.
Best regards, Cristina.
Our customer is upgrading DB from 10g to 11g (11.2.0.3) and the querie that used to work on 10g does not work on 11g throwing the following error.
The querie uses a dblink to a 10g instance (ORAHIS)
SELECT to_char(DTLMCBR,'ddmmyyyy'), sum (valor_doc) FROM [email protected] (dblink to 10g) GROUP by to_char(DTLMCBR,'ddmmyyyy');
ERROR:
ORA-00979: Not a GROUP BY expression
ORA-02063: preceding ORAHIS line

user607378 wrote:
SELECT to_char(DTLMCBR,'ddmmyyyy'), sum (valor_doc) FROM [email protected] (dblink to 10g) GROUP by to_char(DTLMCBR,'ddmmyyyy');
Hi Christina, maybe you oversimplyfied the statement. But what you posted should work (apart from the (dblink to 10g) which I think is just a comment.
Are DTLMCBR and VALOR_DOC columns in this table? If it is a local function and/or synonym then this can be one reason.
SELECT to_char(DTLMCBR,'ddmmyyyy'), sum (valor_doc)
FROM [email protected]
GROUP by to_char(DTLMCBR,'ddmmyyyy');I would write the query differently. But this wouldn't explain any error.
SELECT to_char(trunc(DTLMCBR),'ddmmyyyy'), sum (valor_doc)
FROM [email protected]
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SELECT to_char(trunc("DTLMCBR"),'ddmmyyyy'), sum ("valor_doc")
FROM "isbtdofi00"@ORAHIS.CLI.PT
GROUP by trunc("DTLMCBR");

Can't Deinstall 10G

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First of all, use the Oracle Universal Installer to uninstall. You almost have to select a level or two down to verify that everything in your OraHome10 or whatever you called your home is selected. Make sure you actually have check-marks in all the open boxes by everything.
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Once you have deleted any trace of Oracle 10g, I recommend going to Windows Explorer and finding your C:\Oracle folder and deleting the 10G product folder manually. This is what I had to do.
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Capturing deletes in the source -best practices

What are best practices to capture deletes in the source (10g)? I need to bring the data into the data warehouse. Asynchronous CDC can do the job, but is there anything I should be aware of? Can somebody speak of the best practices of how to implement this? Other options?
Thanks in advance.
Edited by: Rinne on Sep 23, 2010 11:05 AM

Rinne wrote:
Deletes don't happen often at all. Just about 10 records in a month. But I do need to track them daily. I have a daily job that goes against the source and gets the data out. Currently, I'm relying on a timestamp, but I need to change this to get the deletes.If you can afford (i.e. you have control over the application that uses the source database), you may want to only mark the records as "DELETED" (for e.g. add a flag to the table that is set to indicate that record is deleted). That way you change a DELETE to an UPDATE.

DELETE in dblink on 10g

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