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SQL Wrong Column Result Consistently After Installing DB RU 19.19 From 19.17 (Doc ID 2963729.1)

Last updated on NOVEMBER 01, 2023

Applies to:

Oracle Database - Enterprise Edition - Version 19.19.0.0.0 and later
Information in this document applies to any platform.

Symptoms

After upgrading to DB RU 19.19, SQL query with correlated subquery inside UNION ALL and several layers of inline views produces wrong column value. Execution plan PHV remains same in both DB RU 19.17 (Good) and DB RU 19.19 (Bad).

Below is sample self contained SQL query using DUAL table showing this behavior:

 

Changes

 Upgrading to DB RU 19.19 from 19.17

Cause

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