From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | YUriy Zhuravlev <u(dot)zhuravlev(at)postgrespro(dot)ru> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Some questions about the array. |
Date: | 2015-11-09 11:48:54 |
Message-ID: | CAFj8pRD50_=a4zqR1qfaM_Z7rQ4JCHm18UkwecB5CLSTtcDTCg@mail.gmail.com |
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Lists: | pgsql-hackers |
2015-11-09 12:36 GMT+01:00 YUriy Zhuravlev <u(dot)zhuravlev(at)postgrespro(dot)ru>:
> On Sunday 08 November 2015 16:49:20 you wrote:
> > I'm not necessarily objecting to that, but it's not impossible that it
> > could break something for some existing user. We can decide not to
> > care about that, though.
>
> We had an idea. You can use ~ to convert the index to the array which
> always
> starts with 0. Then we can use negative indexes, and you can always find
> the
> beginning of the array.
> Example:
> we have array [-3:3]={1,2,3,4,5,6,7}
> array[~0] == 1
> array[~-1] == 7
> array[~2:~-2] == {3,4,5,6}
>
> What do you think?
>
I am sorry - it is looking pretty obscure. Really need this feature?
Pavel
> --
> YUriy Zhuravlev
> Postgres Professional: http://www.postgrespro.com
> The Russian Postgres Company
>
>
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