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From: =?UTF-8?B?U2HFoW8gR2FudGFy?= <sasog23@gmail.com>
Date: Wed, 22 May 2024 06:04:56 +0200
Message-ID: <CAGB0_67P1JNuVXAijwXtET9YTpqWO=Uii=oeMb-KVaKXQCp=JQ@mail.gmail.com>
Subject: Re: problem with query
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Laurenz Albe <laurenz.albe@cybertec.at>, David Rowley <dgrowleyml@gmail.com>, 
	pgsql-general@lists.postgresql.org
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ANALYZE pg_class; doesn't help
also, query is from "Hasura", so I don't have much room to maneuver

On Tue, 21 May 2024 at 16:18, Tom Lane <tgl@sss.pgh.pa.us> wrote:

> =?UTF-8?B?U2HFoW8gR2FudGFy?= <sasog23@gmail.com> writes:
> > thanks for the info, but is there any solution, given that it's system
> > tables?
>
> Given the complexity of the query, I wonder if you're running into
> problems with join_collapse_limit/from_collapse_limit preventing
> the planner from considering all options.
>
> Also, as David already mentioned, ANALYZE on pg_class might help.
>
>                         regards, tom lane
>

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<div dir=3D"ltr">ANALYZE pg_class; doesn&#39;t help<br><div>also, query is =
from &quot;Hasura&quot;, so I don&#39;t have much room to maneuver</div></d=
iv><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On =
Tue, 21 May 2024 at 16:18, Tom Lane &lt;<a href=3D"mailto:tgl@sss.pgh.pa.us=
">tgl@sss.pgh.pa.us</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">=3D?UTF-8?B?U2HFoW8gR2FudGFy?=3D &lt;<a href=3D"mailto:s=
asog23@gmail.com" target=3D"_blank">sasog23@gmail.com</a>&gt; writes:<br>
&gt; thanks for the info, but is there any solution, given that it&#39;s sy=
stem<br>
&gt; tables?<br>
<br>
Given the complexity of the query, I wonder if you&#39;re running into<br>
problems with join_collapse_limit/from_collapse_limit preventing<br>
the planner from considering all options.<br>
<br>
Also, as David already mentioned, ANALYZE on pg_class might help.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 regards, tom lane<br>
</blockquote></div>

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