| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | marcin mank <marcin(dot)mank(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: ALTER TABLE ... ALTER COLUMN ... SET DISTINCT |
| Date: | 2009-08-02 17:55:08 |
| Message-ID: | 162867790908021055p7112e0a5t63a1ae2fac918d6c@mail.gmail.com |
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| Lists: | pgsql-hackers |
2009/8/2 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> There wasn't any response to this comment:
>
> marcin mank <marcin(dot)mank(at)gmail(dot)com> writes:
>> ALTER COLUMN SET DISTINCT
>> feels like adding a unique constraint.
>
>> ALTER COLUMN SET STATISTICS DISTINCT ?
>> ALTER COLUMN SET STATISTICS NDISTINCT ?
>
> I don't want to add a new keyword, but "SET STATISTICS DISTINCT" would
> be an easy change. Comments?
It's much better than SET DISTINCT.
Pavel
>
> regards, tom lane
>
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