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

Last updated on FEBRUARY 01, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.4 to 10.2.0.5.0 [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: 9.0.1.4 to 9.2.0.8


Goal

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.

Solution

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In this Document
Goal
Solution
References

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