Re: Collations versus user-defined functions
| От | Robert Haas |
|---|---|
| Тема | Re: Collations versus user-defined functions |
| Дата | |
| Msg-id | 18639C02-6C03-4CFB-B568-B028E3CADC2A@gmail.com обсуждение исходный текст |
| Ответ на | Re: Collations versus user-defined functions (Martijn van Oosterhout <kleptog@svana.org>) |
| Список | pgsql-hackers |
On Mar 13, 2011, at 8:25 AM, Martijn van Oosterhout <kleptog@svana.org> wrote:
What you're suggesting is going to lead to situations where the user
sets a non-default collation on every field in every table in the
database and depending on the query they will sometimes get the default
collation anyway.
Not that I know a lot about this, but I agree there should be some kind of bubbling up here. ISTM that you could think of this as replacing the text type (and maybe others) by a collection of closely related types, and operators like >(text, text) become parametrically polymorphic. I am not entirely convinced that there won't be corner cases when this implicit polymorphism will get it wrong, but if it does we can apply a suitably sized band-aid. I agree with Martijn's analysis that it will get it right a lot more often; and consequently avoid the need for a lot of manual fiddling.
...Robert
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