Query Parse Never Ends After Upgrade From 12.1 to 12.2 (Doc ID 2492165.1)

Last updated on JULY 20, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 and later
Information in this document applies to any platform.

After upgrade to 12.2.0.1,query does not finish:

SELECT count(distinct val1) FROM view_x
Errorstack on the hanging process shows a spin on CPU:

service name: SYS$USERS
client details:
O/S info: user: oracle, term: pts/3, ospid: 42075326
machine: program: sqlplus (TNS V1-V3)
application name: sqlplus (TNS V1-V3), hash value=
Current Wait Stack:
Not in wait; last wait ended 29 min 12 sec <<<<<<<<<<<<<<<<<<<<<<<
Wait State:
fixed_waits=0 flags=0x28 boundary=0x0/-1
Session Wait History:
elapsed time of 29 min 12 sec since last wait

Call stack contains kkqstRemRedundantGrBy.

Database upgraded from 12.1.0.2 to 12.2.0.1.

	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

Symptoms

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