Oracle-L: RE: Case of the Missing Rows

From: Fink, Dan <Dan.Fink_at_mdx.com>
Date: Tue, 28 Jan 2003 08:13:51 -0800
Message-ID: <F001.0053C235.20030128081351@fatcity.com>

Rick,

Another idea is to check the explain plans of each of the queries. If there is a difference it could indicate that the data is there, but a particular access path is invalid.

Dan Fink

-----Original Message-----
Sent: Tuesday, January 28, 2003 7:45 AM
To: Multiple recipients of list ORACLE-L

Rick,

Try the following to see which rows are missing. It the same rows are missing each time, perhaps there is a common thread. If not, well....

After Step 2, do a create table as select or sql*plus copy. This will create a backup version. Do a count(*) from each to make sure the numbers agree.

After Step 4, select * from table1 minus select * from backup_copy to locate the missing rows.

Dan Fink

-----Original Message-----
Sent: Monday, January 27, 2003 4:54 PM
To: Multiple recipients of list ORACLE-L

I have a recurring, repeatable problem I was wondering about its cause.

Oracle 9.2.0.1 on W2K Professional (SP2) Dell Optiplex workstation Pentium 4

Step 1 - I do an SQLLDR process that loads 88640 rows to a table Step 2 - SQL*Plus session - SELEC COUNT(*) from the table returns 88640 rows

Step 3 - Do an EXP on the table (to allow fall back to this point) - only exports 87257 rows
Step 4 - SQL*Plus session again - SELEC COUNT(*) from the table returns 87257 rows

No one else has access to the database. There are no unusual entries in the alert log.
There is nothing I have found in the UDUMP or BDUMP directories that would help.

Has anyone else experienced this??

Thanks

Rick Weiss

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Author: Fink, Dan
INET: Dan.Fink_at_mdx.com

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