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Column USERNAME And SESSION_INFO Are UNKNOWN Or NULL In V$LOGMNR_CONTENTS (Doc ID 110301.1)

Last updated on MARCH 26, 2023

Applies to:

Oracle Database - Enterprise Edition - Version 8.1.7.0 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

You have just built the LogMiner dictionary and started the LogMiner session. You query V$LOGMNR_CONTENTS expecting to see the USERNAME and SESSION_INFO for some particular redo or undo operation.

However, the USERNAME field is NULL. This is NOT a recursive operation, and the USERNAME column is expected to contain a non-null value.

Changes

 

Cause

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