mirror of
https://github.com/hanzoai/postgres.git
synced 2026-10-30 18:33:07 +00:00
Melanie Plageman
b93961add9
The btree_gist enum test expects a bitmap heap scan. Since0172721d14enabled setting the VM during on-access pruning and502167cfeset pd_prune_xid on INSERT, scans of enumtmp may set pages all-visible. If autovacuum or autoanalyze then updates pg_class.relallvisible, the planner could choose an index-only scan instead. Make the enumtmp a temp table to exclude it from autovacuum/autoanalyze. Reported-by: Alexander Lakhin <[email protected]> Author: Melanie Plageman <[email protected]> Discussion: https://postgr.es/m/46733d68-aec0-4d09-8120-4c66b87047a4%40gmail.com
43 lines
1.1 KiB
SQL
43 lines
1.1 KiB
SQL
-- enum check
|
|
|
|
create type rainbow as enum ('r','o','g','b','i','v');
|
|
|
|
-- enum values added later take some different codepaths internally,
|
|
-- so make sure we have coverage for those too
|
|
alter type rainbow add value 'y' before 'g';
|
|
|
|
CREATE TEMPORARY TABLE enumtmp (a rainbow);
|
|
|
|
\copy enumtmp from 'data/enum.data'
|
|
|
|
SET enable_seqscan=on;
|
|
|
|
select a, count(*) from enumtmp group by a order by 1;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
|
|
|
|
CREATE INDEX enumidx ON enumtmp USING gist ( a );
|
|
|
|
SET enable_seqscan=off;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
|
|
|
|
SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
|
|
|
|
EXPLAIN (COSTS OFF)
|
|
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
|