Re: Access issue for system queries

On Sat, Mar 30, 2024 at 12:47 PM arun chirappurath <arunsnmimt@gmail.com> wrote:
>
> I have granted access to pg_read_all_stats and pg_read_allsettings to user..still they are not able to receive
resultsfrom this query.its empty..we can run SELECT * FROM pg_stat_statements alone..but not below statement..what
couldbe the reason? 
>
> WITH statements AS (
>         SELECT * FROM pg_stat_statements pss
>                      JOIN pg_roles pr ON (userid=oid)
>         WHERE rolname = current_user
>     )
>     SELECT calls,
>            min_exec_time,
>            max_exec_time,
>            mean_exec_time,
>            stddev_exec_time,
>            (stddev_exec_time/mean_exec_time) AS coeff_of_variance,
>            query
>     FROM statements
>     WHERE calls > 500
>     AND shared_blks_hit > 0
>     ORDER BY mean_exec_time DESC
>     LIMIT 10

Probably because your current user didn't run any query more than 500
times?  Or maybe because you have some other tools that calls
pg_stat_statements_reset() frequently enough.