Re: pg_hint_tables

From: Rob Sargent <robjsargent(at)gmail(dot)com>
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: Kam Fook Wong <kamfook(dot)wong(at)thomsonreuters(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: pg_hint_tables
Date: 2025-09-30 20:24:48
Message-ID: 10E7B5A6-9AAF-4B55-A604-2E005530B391@gmail.com
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I am top posting because I believe you have “hikacked” a thread.

Rather than replying to an existing thread unrelated to your topic you should start your own specific thread.

> On Sep 30, 2025, at 2:13 PM, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
>
> On 9/30/25 12:51, Wong, Kam Fook (TR Technology) wrote:
>> I am trying to use pg_hint_tables in AWS Aurora Postgres. I changed the Postgres parameter "pg_hint_plan.enable_hint_table = 1". Then I logout but can't login anymore with the following error message.
>
> To be clear it is pg_hint_plan not pg_hint_tables?
>
>> “postgres(at)postgres:[2719]:ERROR: relation "hint_plan.hints" does not exist at character 21”.
>> I undo the changes, log back in. Can't find a good resources that lead me to the root cause. So I try a few other things, see below. But no luck. Any guidance or help is greatly appreciated.
>
> From here:
>
> https://github.com/ossc-db/pg_hint_plan/blob/master/docs/installation.md
>
> Did you do?:
>
> "
> Loading pg_hint_plan
>
> pg_hint_plan does not require CREATE EXTENSION. Loading it with a LOAD command will activate it and of course you can load it globally by setting shared_preload_libraries in postgresql.conf. Or you might be interested in ALTER USER SET/ALTER DATABASE SET for automatic loading in specific sessions.
>
> postgres=# LOAD 'pg_hint_plan';
> LOAD
> "
>> ALTER EXTENSION pg_hint_plan UPDATE TO '1.4';
>> GRANT SELECT, INSERT, UPDATE, DELETE ON hint_plan.hints TO PUBLIC;
>> GRANT USAGE ON SCHEMA hint_plan TO PUBLIC;
>> Thank you
>> Kam Fook Wong
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>
>

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