Re: Statistics Import and Export

Corey Huinker <corey.huinker@gmail.com> writes:
> On Mon, Feb 24, 2025 at 2:36 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> ... pg_dump has all that info at
>> hand; there is no need to re-query the server for it.

> I went looking just now, and I can't find it. I see where we have attname
> and attnum arrays for tables, but not indexes. We keep an array of attnums
> for the index, but we'd need to add an array of attnames in order to
> correlate back to our results of pg_stats.

Hmm ... I was thinking we had it already for ALTER INDEX SET
STATISTICS, but I see that is depending on some quite ad-hoc
code (look for indstatcols and indstatvals in pg_dump.c).
I wonder if we could generalize that a bit and share the
work with this case.  Those array_agg calls don't look too fast
anyway, would be better if we could rewrite as a join I bet.

            regards, tom lane