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Dbms_comparison Fails When Unique Constraint Is Defined On Column (Doc ID 1101089.1)

Last updated on AUGUST 18, 2021

Applies to:

Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

When unique constraint is defined on column, DBMS_COMPARISON fails with ORA-23629 .

The index columns in a comparison must uniquely identify every row involved in a comparison. The following constraints satisfy this requirement:
* A primary key constraint
* A unique constraint on one or more non-NULL columns

In spite of having a unique constraint on "not null" column the ORA-23629 is seen.


Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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