| From: | Adriaan Joubert <a(dot)joubert(at)albourne(dot)com> |
|---|---|
| To: | The Hermit Hacker <scrappy(at)hub(dot)org> |
| Cc: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-hackers <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [HACKERS] Re: [GENERAL] Update of bitmask type |
| Date: | 1999-09-22 06:20:50 |
| Message-ID: | 37E87542.2F8ADA4A@albourne.com |
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| Thread: | |
| Lists: | pgsql-general pgsql-hackers |
The Hermit Hacker wrote:
>
> On Tue, 21 Sep 1999, Bruce Momjian wrote:
>
> > Can I get comments on this? Is a bit type something we want installed
> > by default, or in contrib? Seems to me it should be in the main tree.
>
> first...what is a bitmask type? :)
In this case just a single byte in which you can store states quite
easily. It supports the C-style bit operations & (and) ,| (or, couldn't
get it defined as a single bar though, because the parser didn't like
it) ,^ (xor),! (not). For some applications it is just easier to check
whether certain bits are set/not set.
If somebody tells me what needs doing, I could try to get it all into a
more usable format. And I have no clue what SQL3 says about bit-types
(varying bits or something or other?) At the moment it is just a single
byte, and perhaps it needs extension to 2 byte, 4-byte types.
Adriaan
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