pg.ddx.io  pgsql-bugs@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: exclusion@gmail.com
Subject: BUG #17959: amcheck fails to find a matching index tuple for an invisible heap tuple
Date: Sat, 03 Jun 2023 19:00:01 +0000
Message-ID: <17959-0d691c29037366ab@postgresql.org> (raw)

The following bug has been logged on the website:

Bug reference:      17959
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 16beta1
Operating system:   Ubuntu 22.04
Description:        

After some DDL/transactional operations (a reproducer to follow)
pg_amcheck detects an anomaly:
btree index "regress001.pg_catalog.pg_depend_reference_index":
    ERROR:  heap tuple (13,35) from table "pg_depend" lacks matching index
tuple within index "pg_depend_reference_index"

The corresponding table heap page contains:
 lp | lp_off | lp_flags | lp_len | t_xmin | t_xmax | t_field3 | t_ctid  |
t_infomask2 | t_infomask | t_hoff | t_bits | t_oid |                        
                   t_attrs                                            |     
                           raw_flags                                 |
combined_flags
 35 |   6232 |        1 |     49 |    734 |    736 |        2 | (13,35) |   
    8199 |       1280 |     24 |        |       |
{"\\xeb040000","\\x38400000","\\x00000000","\\x370a0000","\\x36400000","\\x00000000","\\x6e"}
| {HEAP_XMIN_COMMITTED,HEAP_XMAX_COMMITTED,HEAP_KEYS_UPDATED}              
| {}

 pg_depend_reference_index contains:
 itemoffset |   ctid    | itemlen | nulls | vars |                      data
                      | dead |  htid   |
        157 | (13,35)   |      24 | f     | f    | 37 0a 00 00 36 40 00 00
00 00 00 00 00 00 00 00 | t    | (13,35) |

SELECT ctid, * FROM pg_depend WHERE refclassid = 0x0a37 AND refobjid =
0x4036 AND refobjsubid = 0
doesn't return any rows.

Shouldn't amcheck ignore invisible tuples?



view thread (5+ messages)  latest in thread

Message-ID: <17959-0d691c29037366ab@postgresql.org>
Permalink:  ../17959-0d691c29037366ab@postgresql.org/
Also on:    postgresql.org/message-id/17959-0d691c29037366ab@postgresql.org

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-bugs@postgresql.org
  Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, exclusion@gmail.com
  Subject: Re: BUG #17959: amcheck fails to find a matching index tuple for an invisible heap tuple
  In-Reply-To: <17959-0d691c29037366ab@postgresql.org>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox