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* BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables
@ 2026-03-16 15:51 PG Bug reporting form <[email protected]>
2026-03-17 12:14 ` Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables Fujii Masao <[email protected]>
0 siblings, 1 reply; 3+ messages in thread
From: PG Bug reporting form @ 2026-03-16 15:51 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]
The following bug has been logged on the website:
Bug reference: 19435
Logged by: Hang ammmkilo
Email address: [email protected]
PostgreSQL version: 18.3
Operating system: Ubuntu 22.04
Description:
A user encountered an error when attempting to execute a query involving
multiple RIGHT JOIN operations and a NATURAL JOIN on the same table
(pg_table_a). The error message returned was:
[XX000]ERROR: no relation entry for relid 2
This error seems to be an internal one and should not be triggered by users.
It might be a bug.
```sql
DROP TABLE IF EXISTS pg_table_a;
CREATE TABLE pg_table_a (
id INTEGER PRIMARY KEY,
col_bool BOOLEAN
);
INSERT INTO pg_table_a (id, col_bool)
VALUES (5, TRUE);
SELECT 1 AS c1
FROM (
pg_table_a AS tom0
RIGHT JOIN (
(pg_table_a AS tom1 NATURAL JOIN pg_table_a AS tom2)
RIGHT JOIN pg_table_a AS tom3
ON tom1.col_bool IS NOT NULL
)
ON tom1.col_bool
);
```
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables
2026-03-16 15:51 BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables PG Bug reporting form <[email protected]>
@ 2026-03-17 12:14 ` Fujii Masao <[email protected]>
2026-03-17 12:33 ` Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables Kirill Reshke <[email protected]>
0 siblings, 1 reply; 3+ messages in thread
From: Fujii Masao @ 2026-03-17 12:14 UTC (permalink / raw)
To: [email protected]; [email protected]; +Cc: Alexander Korotkov <[email protected]>
On Tue, Mar 17, 2026 at 7:34 PM PG Bug reporting form
<[email protected]> wrote:
>
> The following bug has been logged on the website:
>
> Bug reference: 19435
> Logged by: Hang ammmkilo
> Email address: [email protected]
> PostgreSQL version: 18.3
> Operating system: Ubuntu 22.04
> Description:
>
> A user encountered an error when attempting to execute a query involving
> multiple RIGHT JOIN operations and a NATURAL JOIN on the same table
> (pg_table_a). The error message returned was:
> [XX000]ERROR: no relation entry for relid 2
> This error seems to be an internal one and should not be triggered by users.
> It might be a bug.
> ```sql
> DROP TABLE IF EXISTS pg_table_a;
>
> CREATE TABLE pg_table_a (
> id INTEGER PRIMARY KEY,
> col_bool BOOLEAN
> );
>
> INSERT INTO pg_table_a (id, col_bool)
> VALUES (5, TRUE);
>
> SELECT 1 AS c1
> FROM (
> pg_table_a AS tom0
> RIGHT JOIN (
> (pg_table_a AS tom1 NATURAL JOIN pg_table_a AS tom2)
> RIGHT JOIN pg_table_a AS tom3
> ON tom1.col_bool IS NOT NULL
> )
> ON tom1.col_bool
> );
> ```
Thanks for the report!
I was able to reproduce this issue on the master. git bisect that I ran pointed
to commit fc069a3a631 as the likely cause. So I've CC'd its committer,
Alexander, on this thread.
Regards,
--
Fujii Masao
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables
2026-03-16 15:51 BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables PG Bug reporting form <[email protected]>
2026-03-17 12:14 ` Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables Fujii Masao <[email protected]>
@ 2026-03-17 12:33 ` Kirill Reshke <[email protected]>
0 siblings, 0 replies; 3+ messages in thread
From: Kirill Reshke @ 2026-03-17 12:33 UTC (permalink / raw)
To: Fujii Masao <[email protected]>; +Cc: [email protected]; [email protected]; Alexander Korotkov <[email protected]>
On Tue, 17 Mar 2026 at 17:15, Fujii Masao <[email protected]> wrote:
>
> On Tue, Mar 17, 2026 at 7:34 PM PG Bug reporting form
> <[email protected]> wrote:
> >
> > The following bug has been logged on the website:
> >
> > Bug reference: 19435
> > Logged by: Hang ammmkilo
> > Email address: [email protected]
> > PostgreSQL version: 18.3
> > Operating system: Ubuntu 22.04
> > Description:
> >
> > A user encountered an error when attempting to execute a query involving
> > multiple RIGHT JOIN operations and a NATURAL JOIN on the same table
> > (pg_table_a). The error message returned was:
> > [XX000]ERROR: no relation entry for relid 2
> > This error seems to be an internal one and should not be triggered by users.
> > It might be a bug.
> > ```sql
> > DROP TABLE IF EXISTS pg_table_a;
> >
> > CREATE TABLE pg_table_a (
> > id INTEGER PRIMARY KEY,
> > col_bool BOOLEAN
> > );
> >
> > INSERT INTO pg_table_a (id, col_bool)
> > VALUES (5, TRUE);
> >
> > SELECT 1 AS c1
> > FROM (
> > pg_table_a AS tom0
> > RIGHT JOIN (
> > (pg_table_a AS tom1 NATURAL JOIN pg_table_a AS tom2)
> > RIGHT JOIN pg_table_a AS tom3
> > ON tom1.col_bool IS NOT NULL
> > )
> > ON tom1.col_bool
> > );
> > ```
>
> Thanks for the report!
>
> I was able to reproduce this issue on the master. git bisect that I ran pointed
> to commit fc069a3a631 as the likely cause. So I've CC'd its committer,
> Alexander, on this thread.
>
> Regards,
>
> --
> Fujii Masao
>
>
My git bisect shows the same commit
also, after "set enable_self_join_elimination to false;" query executes ok
--
Best regards,
Kirill Reshke
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2026-03-17 12:33 UTC | newest]
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2026-03-16 15:51 BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables PG Bug reporting form <[email protected]>
2026-03-17 12:14 ` Fujii Masao <[email protected]>
2026-03-17 12:33 ` Kirill Reshke <[email protected]>
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