This fails since 1349d2790b
commit 1349d2790bf48a4de072931c722f39337e72055e
Author: David Rowley <drow...@postgresql.org>
Date: Tue Aug 2 23:11:45 2022 +1200
Improve performance of ORDER BY / DISTINCT aggregates
ts=# CREATE TABLE t (a int, b text) PARTITION BY RANGE (a);
ts=# CREATE TABLE td PARTITION OF t DEFAULT;
ts=# INSERT INTO t SELECT 1 AS a, '' AS b;
ts=# SET enable_partitionwise_aggregate=on;
ts=# explain SELECT a, COUNT(DISTINCT b) FROM t GROUP BY a;
ERROR: XX000: could not find pathkey item to sort
LOCATION: prepare_sort_from_pathkeys, createplan.c:6235
--
Justin
