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From: Jonathan S. Katz <[email protected]>
To: Euler Taveira <[email protected]>
Cc: [email protected]
Cc: [email protected]
Subject: Re: Can we only add values to enums?
Date: Fri, 16 Mar 2018 09:14:31 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAHE3wgiMsjPcrDWpiY37kAv==A+d2JiEWtC0zgBMDs2fmdsZuw@mail.gmail.com>
References: <[email protected]>
	<CAHE3wgiMsjPcrDWpiY37kAv==A+d2JiEWtC0zgBMDs2fmdsZuw@mail.gmail.com>


> On Mar 15, 2018, at 11:33 PM, Euler Taveira <[email protected]> wrote:
> 
> 2018-03-12 20:28 GMT-03:00 PG Doc comments form <[email protected]>:
>> I need to add a value to an enum, so I found this page, which answered my
>> question. However, I found it quite confusing that it only documents adding
>> a value. I would expect it to also document how to remove a value from an
>> enum? Is this not possible? If not, I consider it a bug. But either way, if
>> it is not possible, you should explicitly document it on this page.
>> 
> If it is not document, this means that it is not supported. It is not
> a bug. It is by design. Read the discussion about this feature at [1].
> Removing a enum value requires a table rewrite. I'm not sure it is
> worth a note.

I would say that’s the exact reason why it should be documented,
so it’s clear that it was by design.

We could also redirect people to DOMAINs if they need more
flexibility in what is added/removed from an “enum-like” type.

Jonathan

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