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From: David E. Wheeler <[email protected]>
To: Robert Haas <[email protected]>
Cc: Florents Tselai <[email protected]>
Cc: Alexander Korotkov <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: pgsql-hackers <[email protected]>
Cc: Andrew Dunstan <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Subject: Re: PATCH: jsonpath string methods: lower, upper, initcap, l/r/btrim, replace, split_part
Date: Tue, 13 May 2025 14:07:10 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+Tgmob03B6h1SMsi7vs9uOX+vrqg_tyhh--mKC3BaTJ08qKYA@mail.gmail.com>
References: <CA+v5N40sJF39m0v7h=QN86zGp0CUf9F1WKasnZy9nNVj_VhCZQ@mail.gmail.com>
	<[email protected]>
	<CAPpHfdtGhn_5jfLoepOScyqT+FXYB9QtV-OEprychDcMJco7mw@mail.gmail.com>
	<CA+v5N42PVJH3HbwLE1yC75XR6E5zGnCCdtSUXfgFwtGyPP8XYg@mail.gmail.com>
	<CA+Tgmob03B6h1SMsi7vs9uOX+vrqg_tyhh--mKC3BaTJ08qKYA@mail.gmail.com>

On May 9, 2025, at 15:50, Robert Haas <[email protected]> wrote:

> # We have the kluge of having separate "_tz" functions to support
> # non-immutable datetime operations, but that way doesn't seem like
> # it's going to scale well to multiple sources of mutability.
> 
> But I'm not sure I understand why it matters that there are multiple
> sources of mutability here. Maybe I'm missing a piece of the puzzle
> here.

I read that to mean “we’re not going to add another json_path_exists_* function for every potentially immutable JSONPath function. But I take your point that it could be generalized for *any* mutable function. In which case maybe it should be renamed?

Best,

David



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