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.
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.
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