Mview Comments Missing After Out Of Place Refresh - 12c

(Doc ID 2399854.1)

Last updated on MAY 24, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Information in this document applies to any platform.

Symptoms

Out-of-Place Mview Refresh Option was introduced in Oracle Database 12c Release 1 to improve materialized view refresh performance and availability. This refresh option uses outside tables during refresh, Where as the existing "in-place" refresh directly applies changes to the materialized view container table. In out-of-place refresh method, the entire or affected portions of a materialized view are computed into one or more outside tables.

While doing Out-of-Place Refresh, Comments on the original materialized view container table are not copied to the outside table. 

Changes

Mview creation with comment

 

Cause

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