Query With Distinct Key Word Slow After 12c Upgrade
(Doc ID 2336746.1)
Last updated on MARCH 03, 2022
Applies to:Oracle Database Cloud Schema 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
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
- A select query performs poorly after 12c upgrade
- There is a DISTINCT key word in the subquery.
- 126.96.36.199 includes a fix that considers the DISTINCT in the costing of unnesting of the subquery
Inclusion of fix for 12388221.
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