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From: Tom Lane <tgl@sss.pgh.pa.us>
To: exclusion@gmail.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #15694: Server crash in EXPLAIN with LATERAL and a
 partitioned table
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References: <15694-74f2ca97e7044f7f@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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Date: Thu, 14 Mar 2019 10:40:20 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
> CREATE TABLE prt1_l (a int) PARTITION BY RANGE(a);
> CREATE TABLE prt2_l (a int);

> EXPLAIN
> SELECT * FROM prt1_l t1 LEFT JOIN LATERAL
>   (SELECT t1.a as t1a, prt1_l.a FROM prt1_l) t2 ON t1.a = t2.a;

> crashes the server with the stack trace:

Huh.  Clearly, when we added that Assert, we should've fixed
set_dummy_rel_pathlist so that it would properly populate the
required_outer of the dummy path.  I'm surprised though that
this wasn't already exposed by the existing regression tests...

			regards, tom lane