ORA-01758 When Adding IDENTITY Column Creates Anyway A System Generated Sequence
(Doc ID 1960560.1)
Last updated on AUGUST 23, 2021
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 and laterOracle 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 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
On 12.1.0.2 database version.
When attempting to add IDENTITY column to a table with data, the following error occurs and the sequence is created anyway.
ORA-01758: table must be empty to add mandatory (NOT NULL) column
Steps to reproduce:
The issue can be reproduced at will with the following steps:
1. create a table
2. populate the table with data
3. add the identity primary key column
Test Case:
Due to this issue, users cannot create an identity columns on existing tables with data in it.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |