Re: BUG #19350: Short circuit optimization missed when running sql scriptes in JDBC

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: "798604270(at)qq(dot)com" <798604270(at)qq(dot)com>, "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: BUG #19350: Short circuit optimization missed when running sql scriptes in JDBC
Date: 2025-12-10 13:33:15
Message-ID: CAKFQuwbbk7_5vFzkKM+b52xVjJ+p8Wz8UwP5sFWeBnKi69D0-A@mail.gmail.com
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On Wednesday, December 10, 2025, PG Bug reporting form <
noreply(at)postgresql(dot)org> wrote:

> The following bug has been logged on the website:
>
> Bug reference: 19350
> Logged by: Chi Zhang
> Email address: 798604270(at)qq(dot)com
> PostgreSQL version: 17.6
> Operating system: ubuntu 24.04 with docker
> Description:
>
> Hi,
>
> In the following test case, if I run it in JDBC, the prepared statement
> will
> trigger a divide by zero error. But if run it in command line, there will
> not be the same error.
>
>
This isn’t a bug in PostgreSQL, it’s a bug in the query you’ve written.
The expectation of short-circuiting is flawed - the non-failure outcome is
not something than can be relied upon.

David J.

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