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From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: tharakan@gmail.com
Subject: BUG #18885: ERROR: corrupt MVNDistinct entry - 2
Date: Wed, 09 Apr 2025 13:46:29 +0000
Message-ID: <18885-da51324078588253@postgresql.org> (raw)

The following bug has been logged on the website:

Bug reference:      18885
Logged by:          Robins Tharakan
Email address:      tharakan@gmail.com
PostgreSQL version: Unsupported/Unknown
Operating system:   Ubuntu
Description:        

The following SQL triggers "ERROR: corrupt MVNDistinct entry", however this
seems to be unrelated to a recent bugfix[1] for a similar issue (thus '2' in
the $SUBJECT).

The surfacing commit appears to be 6bb6a62f3cc45624c601d5270673a17447734629
[2].

SQL
===
$ cat ../sqith/repro.sql
CREATE TABLE a(b BIT VARYING, d int4range);
CREATE TABLE e(LIKE a);
CREATE TABLE f(LIKE a);
INSERT INTO f(d, b) VALUES('[0,0)', '');
CREATE STATISTICS ON d, b FROM f;
ANALYZE;
SELECT FROM f RIGHT JOIN e ON (e.d=f.d)AND(f.d=e.d);


Commit
======
Testing for start crashing
---
Checking (306dd6e727b~0) - 306dd6e727 - fail (1)
Checking (306dd6e727b~10) - 91f1fe90c7 - fail (1)
Checking (306dd6e727b~30) - 969ab9d4f5 - fail (1)
Checking (306dd6e727b~70) - 1495eff7bd - fail (1)
.
.
Checking (306dd6e727b~447) - fae535da0a - pass (0)
Checking (306dd6e727b~446) - 6bb6a62f3c - fail (1)
Surfacing Commit is 6bb6a62f3cc45624c601d5270673a17447734629



SQL Output
==========
$ psql -p 9999 postgres -f ../sqith/repro.sql
CREATE TABLE
CREATE TABLE
CREATE TABLE
INSERT 0 1
CREATE STATISTICS
ANALYZE
psql:../sqith/repro.sql:7: ERROR:  corrupt MVNDistinct entry

Found using SQLSmith / creduce.
-
robins
https://robins.in

Reference
1. Similar bugfix:
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=e28033fe1af8037e0fec8bb3a32fabbe1...
2. Surfacing commit:
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=6bb6a62f3cc45624c601d5270673a1744...



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