Thread: BUG #18506: Memory Leak on wrong INNER JOINs

BUG #18506: Memory Leak on wrong INNER JOINs

From
PG Bug reporting form
Date:
The following bug has been logged on the website:

Bug reference:      18506
Logged by:          D Goutis
Email address:      gts.dmtr@gmail.com
PostgreSQL version: 14.6
Operating system:   Ubuntu Linux 22.04
Description:

Greetings,

I do not know the severity of this bug. I stumbled up due to a typo ( `a`
instead of `ag`).
In a series of multiple INNER JOINS, I referenced wrongly another table and
the postgres docker container bloated a 64GB RAM.
The commented out line is the fix.
I could submit more details.

Regards,
Dimitris

```
CREATE OR REPLACE VIEW exampledb.vw_project_summary AS
  SELECT
    p.project_id
    , p.project_name
  , ag.unique_values AS implementing_agencies
FROM exampledb.mt_project p
INNER JOIN exampledb.vw_action_types_per_project a
ON (p.project_id = a.project_id)
INNER JOIN exampledb.vw_agencies_per_project ag
ON (p.project_id = a.project_id);
-- ON (p.project_id = ag.project_id);

```


Re: BUG #18506: Memory Leak on wrong INNER JOINs

From
"David G. Johnston"
Date:
On Wed, Jun 12, 2024 at 7:25 AM PG Bug reporting form <noreply@postgresql.org> wrote:
The following bug has been logged on the website:

Bug reference:      18506
Logged by:          D Goutis
Email address:      gts.dmtr@gmail.com
PostgreSQL version: 14.6
Operating system:   Ubuntu Linux 22.04
Description:       

I do not know the severity of this bug.

Incorrectly written queries that cause super-large results that consume lots of memory are not evidence of bugs.

You are also reporting against a nearly two year old unsupported minor version and haven't provided a self-contained example; not particularly helpful.

David J.

Re: BUG #18506: Memory Leak on wrong INNER JOINs

From
GoutisD
Date:
You are correct in every aspect.
Given more time, I will try to replicate the issue, just in case it might lead to an actual bug ( or a safety net).

Thanks for your quick response.

Regards,
Dimitris

Στις Τετ 12 Ιουν 2024 στις 5:42 μ.μ., ο/η David G. Johnston <david.g.johnston@gmail.com> έγραψε:
On Wed, Jun 12, 2024 at 7:25 AM PG Bug reporting form <noreply@postgresql.org> wrote:
The following bug has been logged on the website:

Bug reference:      18506
Logged by:          D Goutis
Email address:      gts.dmtr@gmail.com
PostgreSQL version: 14.6
Operating system:   Ubuntu Linux 22.04
Description:       

I do not know the severity of this bug.

Incorrectly written queries that cause super-large results that consume lots of memory are not evidence of bugs.

You are also reporting against a nearly two year old unsupported minor version and haven't provided a self-contained example; not particularly helpful.

David J.