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From: Tom Lane <tgl@sss.pgh.pa.us>
To: jiangdian_m@163.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #18567: ERROR: cache lookup failed for attribute 1 of
 relation 74580
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Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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PG Bug reporting form <noreply@postgresql.org> writes:
> [ pg_get_indexdef can fail on a concurrently-dropped index ]

I'm not terribly concerned about this.  In any case, the only
fix I can think of is for pg_get_indexdef to take a lock on the
index, which seems like a cure considerably worse than the
disease.

			regards, tom lane