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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Corey Huinker <corey.huinker@gmail.com>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Richard Wesley <richard@duckdblabs.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Query generates infinite loop
Date: Mon, 09 May 2022 12:42:44 -0400
Message-ID: <3817754.1652114564@sss.pgh.pa.us> (raw)
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Corey Huinker <corey.huinker@gmail.com> writes:
> The infinite-upper-bound-withlimit-pushdown counterexample makes sense, but
> seems like we're using generate_series() only because we lack a function
> that generates a series of N elements, without a specified upper bound,
> something like

>      generate_finite_series( start, step, num_elements )

Yeah, that could be a reasonable thing to add.

> And if we did that, I'd lobby that we have one that takes dates as well as
> one that takes timestamps, because that was my reason for starting the
> thread above.

Less sure about that.  ISTM the reason that the previous proposal failed
was that it introduced too much ambiguity about how to resolve
unknown-type arguments.  Wouldn't the same problems arise here?

			regards, tom lane





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