Re: Fix bug with accessing to temporary tables of other sessions

On 07/05/2026 10:04, Alexander Korotkov wrote:
> Thus, I don't see the reason why this shouldn't be committed and
> backpatched to PG17 (first release containing b7b0f3f27241).

Quick question: should we work on a separate patch for PG14-PG16? In
these versions, the error message is raised depending on the temporary
table's tuple count, as demonstrated in [1]:

== session 1 ==

psql (14.20 (Debian 14.20-1.pgdg13+1))
Type "help" for help.

postgres=# CREATE TEMPORARY TABLE t (id int);
CREATE TABLE
postgres=# \d pg_temp*.*
Table "pg_temp_3.t"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
id | integer | | |

== session 2 ==

psql (14.20 (Debian 14.20-1.pgdg13+1))
Type "help" for help.

postgres=# SELECT * FROM pg_temp_3.t;
id
----
(0 rows)

== session 1 ==

postgres=# INSERT INTO t VALUES (42);
INSERT 0 1

== session 2 ==

postgres=# SELECT * FROM pg_temp_3.t;
ERROR: cannot access temporary tables of other sessions

Thanks!

Best, Jim

1 -
https://www.postgresql.org/message-id/800c75af-9bd0-48ac-b4bf-54cadf2bc723%40uni-muenster.de