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How To Identify LOB Segment Use PCTVERSION Or RETENTION From Data Dictionary (Doc ID 422826.1)

Last updated on JULY 06, 2023

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 9.2 to 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database 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
Information in this document applies to any platform.
Oracle Server Enterprise Edition - Version: to


The Purpose of this Note Is To explain the behavior of PCTVERSION and RETENTION  in LOB Segments.

The Following Example shows the issue.

Create a LOB specifying PCTVERSION = 5 and create another one specifying RETENTION.
When query DBA_LOBS, would not expect to see default PCTVERSION = 10 when RETENTION was specified.

see the change in value under PCTVERSION, but both PCTVERSION and RETENTION columns are populated.


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