Order of Data Retrieval Differs After Upgrading From 9i to a Higher Version
(Doc ID 456707.1)
Last updated on OCTOBER 22, 2019
Applies to:
Oracle Database - Enterprise Edition - Version 10.1.0.2 and laterOracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
SCOPE & APPLICATION
Customers, Support
SQL output and the order of data
It is not uncommon for SQL in 10g or later, using the same execution plan as previously in 9i, to return the data in a different order for columns outside of the ORDER BY clause.
For example, the following output is from SQL with an ORDER BY NAME clause:
After an upgrade, this can cause issues with customers and applications which were reliant on the fixed order of SURNAME although it was not explicitly ordered.
Changes
Upgrade from 9.x to a higher version
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |