Thread: BUG #16965: Select query fails with ERROR: XX000: could not find pathkey item to sort
BUG #16965: Select query fails with ERROR: XX000: could not find pathkey item to sort
From
PG Bug reporting form
Date:
The following bug has been logged on the website: Bug reference: 16965 Logged by: Jakub Zemanek Email address: jakub.zemanek@gmail.com PostgreSQL version: 13.2 Operating system: Ubuntu 20.04 Description: Hi, after upgrade of our zabbix database from v 12 to v 13, we have encountered error in select queries. When we SET max_parallel_workers_per_gather=0; then the query finishes without error. The query looks like this: SELECT DISTINCT COUNT(DISTINCT t.triggerid) AS rowscount,i.hostid FROM triggers t,functions f,items i WHERE i.hostid=10406 AND f.triggerid=t.triggerid AND f.itemid=i.itemid AND t.flags IN (0,4) GROUP BY i.hostid;' ERROR: XX000: could not find pathkey item to sort LOCATION: prepare_sort_from_pathkeys, createplan.c:6013 Environment info: psql --version psql (PostgreSQL) 13.2 (Ubuntu 13.2-1.pgdg20.04+1) psql -c 'select version();' PostgreSQL 13.2 (Ubuntu 13.2-1.pgdg20.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, 64-bit uname -a Linux hostname 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux pg_ctlcluster 13 main status pg_ctl: server is running (PID: 595329) /usr/lib/postgresql/13/bin/postgres "-D" "/var/lib/postgresql/13/main" "-c" "config_file=/etc/postgresql/13/main/postgresql.conf" How to reproduce: createdb test wget https://www.coreit.cz/download/test.sql.gz zcat test-plain.sql.gz | psql test vacuumdb -z test psql test -X -v VERBOSITY=verbose -c 'SELECT DISTINCT COUNT(DISTINCT t.triggerid) AS rowscount,i.hostid FROM triggers t,functions f,items i WHERE i.hostid=10406 AND f.triggerid=t.triggerid AND f.itemid=i.itemid AND t.flags IN (0,4) GROUP BY i.hostid;'
Re: BUG #16965: Select query fails with ERROR: XX000: could not find pathkey item to sort
From
Bruce Momjian
Date:
On Thu, Apr 15, 2021 at 04:05:03PM +0000, PG Bug reporting form wrote:
> The following bug has been logged on the website:
>
> Bug reference: 16965
> Logged by: Jakub Zemanek
> Email address: jakub.zemanek@gmail.com
> PostgreSQL version: 13.2
> Operating system: Ubuntu 20.04
> Description:
>
> Hi,
> after upgrade of our zabbix database from v 12 to v 13, we have encountered
> error in select queries. When we SET max_parallel_workers_per_gather=0; then
> the query finishes without error. The query looks like this:
> SELECT DISTINCT COUNT(DISTINCT t.triggerid) AS rowscount,i.hostid FROM
> triggers t,functions f,items i WHERE i.hostid=10406 AND
> f.triggerid=t.triggerid AND f.itemid=i.itemid AND t.flags IN (0,4) GROUP BY
> i.hostid;'
> ERROR: XX000: could not find pathkey item to sort
> LOCATION: prepare_sort_from_pathkeys, createplan.c:6013
This issue was reported on April 12 by someone else:
https://www.postgresql.org/message-id/flat/91f3ec99-85a4-fa55-ea74-33f85a5c651f%40swarm64.com
A patch to fix it is being considered. You might want to watch that
thread to test or apply the patch, or wait for a fix in the next minor
release.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.