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MVIEW Fast Refresh Returns Duplicate Rows with Join of Remote Tables over DBLINK (Doc ID 2173721.1)

Last updated on NOVEMBER 07, 2023

Applies to:

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 Database Exadata Express Cloud Service - 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.

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 a join between remote tables (at either the same or different sites).   Example:

 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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