Horton

Avoid syscache lookup while building a WAIT FOR tuple descriptor

Alexander Korotkov <akorotkov@postgresql.org>

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Commit: 834038c1f8d52f51666c60ec774bbbf590f4e8c6
Author: Alexander Korotkov <akorotkov@postgresql.org>
Date: 2026-04-06T19:47:26Z
Releases: 19 (unreleased) 
Avoid syscache lookup while building a WAIT FOR tuple descriptor

Use TupleDescInitBuiltinEntry instead of TupleDescInitEntry when building
the result tuple descriptor for the WAIT FOR command. This avoids a syscache
access that could re-establish a catalog snapshot after we've explicitly
released all snapshots before the wait.

Discussion: https://postgr.es/m/CABPTF7U%2BSUnJX_woQYGe%3D%3DR9Oz%2B-V6X0VO2stBLPGfJmH_LEhw%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>

Files

PathChange+/−
src/backend/commands/wait.c modified +10 −3

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