My Oracle Support Banner

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 NOVEMBER 07, 2023

Applies to:

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


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.


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


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.