Re: Adding some error context for lock wait failures

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Zhang Mingli <zmlpostgres(at)gmail(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org, Steve Baldwin <steve(dot)baldwin(at)gmail(dot)com>
Subject: Re: Adding some error context for lock wait failures
Date: 2025-07-11 02:53:28
Message-ID: 1664608.1752202408@sss.pgh.pa.us
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Zhang Mingli <zmlpostgres(at)gmail(dot)com> writes:
> Do we need to rollback error_context_stack to the previous state if we enter the branch for PG_CATCH()?

No. The PG_TRY mechanism itself deals with that: the next outer
level of PG_TRY will restore error_context_stack to what it had
been. If this were not so, most other places that add an
error_context_stack entry would also be broken.

regards, tom lane

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