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Intermittent Malformed SQL_UNDO Containing NULL In V$LOGMNR_CONTENTS (Doc ID 2418630.1)

Last updated on APRIL 03, 2020

Applies to:

Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

NOTE: The document content below, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

Update statement from SQL_UNDO contain NULL for columns values, instead of the actual values. Replicating this statement through Golden Gate, generates errors.

Golden Gate application fails with ORA-1403 error, intermittently, for some update operations. Logminer output for an update operation shows the following SQL_UNDO :

This malformed sql_undo is triggered only for DML on compressed tables .

Changes

 OLTP Compression enabled.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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