Re: BUG #18947: TRAP: failed Assert("len_to_wrt >= 0") in pg_stat_statements - Mailing list pgsql-bugs

From Michael Paquier
Subject Re: BUG #18947: TRAP: failed Assert("len_to_wrt >= 0") in pg_stat_statements
Date
Msg-id aET38DIyBht33bIP@paquier.xyz
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In response to Re: BUG #18947: TRAP: failed Assert("len_to_wrt >= 0") in pg_stat_statements  (Dilip Kumar <dilipbalaut@gmail.com>)
Responses Re: BUG #18947: TRAP: failed Assert("len_to_wrt >= 0") in pg_stat_statements
List pgsql-bugs
On Sat, Jun 07, 2025 at 10:19:53PM +0530, Dilip Kumar wrote:
> I didn't get time to debug, I might look into it tomorrow if someone
> doesn't do it before that, but I am able to reproduce the issue and
> seems like problem is with respect to computing the quer_loc in below
> loop, and due to that 'quer_loc' is becoming bigger than query_len and
> hitting the assert.

The loop in charge of assigning the constants in the queries needs to
be smarter in terms of the new locations assigned to sub-queries, here
the VALUES one.

499edb09741b is the origin of the regression, so open item assigned to
me (will look into it later), adding Anthonin in CC.
--
Michael

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