Re: Postgres 15 SELECT query doesn't use index under RLS

Hi Alexander!
Apart from the problem you are writing about I'd like to ask you to explain
how you interpret counted frac_MCV - for me it has no sense at all to
summarize most_common_freqs.
Please rethink it and explain what was the idea of such SUM ? I understand
that it can be some measure for ratio of NULL values but only in some cases
when n_distinct is small.

regards

> Statistics: n_distinct, MCV, histogram
>>
>> Useful to check statistics leading to bad join plan. SELECT (SELECT
>> sum(x) FROM unnest(most_common_freqs) x) frac_MCV, tablename, attname,
>> inherited, null_frac, n_distinct, array_length(most_common_vals,1) n_mcv,
>> array_length(histogram_bounds,1) n_hist, correlation FROM pg_stats WHERE
>> attname='...' AND tablename='...' ORDER BY 1 DESC;
>>
>> Returns 0 rows.
>>
>>
>> Kind regards,
>>
>> Alexander
>>
>