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Wrong Results (Zero Count Returned) from Query with COUNT(DISTINCT ...) after Upgrading to RU 19.11 through 19.15 (Doc ID 2877705.1)

Last updated on JUNE 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 19.11.0.0.0 to 19.15.0.0.0 [Release 19]
Information in this document applies to any platform.

Symptoms

Wrong results (i.e., a count of zero, instead of a positive integer) occurs from a query which issues a COUNT(DISTINCT ...) aggregate.

Internal view, VW_DAG_0, is observed within the execution plan, in the case of correct results, whereas in the case of wrong results, VM_NWVW is observed.

Setting _FIX_CONTROL to '9791810:0' at the session level acts as a workaround.

Changes

 You have recently upgraded to Oracle Database Release Update (RU) 19.11 through 19.15.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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