MVIEW Fast Refresh Returns Duplicate Rows with Outer Join over DBLINK (Doc ID 2173721.1)

Last updated on AUGUST 18, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.5 and later
Information in this document applies to any platform.

Symptoms

1. When you fast refresh, you see duplicates in the mview that are resolved upon the next fast refresh.

2. The select portion of the mview DDL contains an outer join on two remote tables (at either the same or different sites).   Example:

 

Cause

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