From: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
---|---|
To: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
Cc: | Michael Fuhr <mike(at)fuhr(dot)org>, ted(at)php(dot)net, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: enums |
Date: | 2005-10-28 20:12:01 |
Message-ID: | 43628611.2020906@dunslane.net |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Jim C. Nasby wrote:
>>>>
>>>>
>>>But why force a re-write of the entire table just to change the name of
>>>something?
>>>
>>>
>>>
>>>
>>Because you are not just changing the name of something.
>>
>>
>
>No, I was refering specifically to the case of wanting to rename
>something. IE: you setup an enum for sky colors (blue, black), and then
>the PHB issues an edict that the daytime sky is now green. In this case
>you (or at least I) don't want to define a new enum, I just want to
>change 'blue' to 'green' in that enum. There's no reason it needs to hit
>the table at all.
>
>
Well, with enumkit you can't, because the values are hardwired in the
.so file. With a builtin facility you would be able to, because the
values would live in the catalog. However, hacking the catalog is not
something I would encourage - what you are suggesting basically breaks
the abstraction. But sure, it would be possible. I would not provide an
SQL level facility to do it, though. My approved way to do it would be
like the example I gave earlier.
cheers
andrew
From | Date | Subject | |
---|---|---|---|
Next Message | Jim C. Nasby | 2005-10-28 20:17:58 | Re: TRAP: FailedAssertion("!((itemid)->lp_flags & 0x01)", |
Previous Message | Tom Lane | 2005-10-28 19:04:02 | Re: TRAP: FailedAssertion("!((itemid)->lp_flags & 0x01)", |