| From: | Mahadevan Ramachandran <mahadevan(at)rapidloop(dot)com> |
|---|---|
| To: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #15245: pg_stat_all_tables does not include partition master tables |
| Date: | 2018-06-18 13:58:15 |
| Message-ID: | CADjCDK9v4LK+8HhtjFeF4D1q5W=OgCPwA6S2oP47nCVM4zafkQ@mail.gmail.com |
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On Mon, Jun 18, 2018 at 3:51 PM, Amit Langote
<Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> about how to aggregate across partitions. We could leave that NULL for
> now, that is, if we decide to list partitioned tables in the
> pg_stat_all_tables output at all re OP's complaint.
"Complaint" is too strong a word :-)
I guess the real issue is that both options are a bit inconsistent. Not listing
a partitoned table in an "all tables" view does not seem any worse or better
than having it there with all columns as NULL. Should've thought about it
before I raised the bug :-)
Might I suggest a new system view that lists all (parent, child) associations,
which can then be joined with pg_stat_all_tables so users can roll up
child table stats into each parent using whatever aggregation functions
they'd like?
Thanks for your time.
-Mahadevan
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