Re: MULTISET and additional functions for ARRAY

From: Nicolas Barbier <nicolas(dot)barbier(at)gmail(dot)com>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MULTISET and additional functions for ARRAY
Date: 2010-11-11 18:24:00
Message-ID: AANLkTik8TDO=BsHe61TC3qAZm4R1B-ZOQPfvZQjgeK7f@mail.gmail.com
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2010/11/11 David E. Wheeler <david(at)kineticode(dot)com>:

> On Nov 11, 2010, at 10:05 AM, Tom Lane wrote:
>
>>> So are you planning to implement multisets? It's a feature I'd love to see
>>
>> What actual functionality does it buy?  AFAICT from Itagaki-san's
>> description, it's an array only you ignore the specific element order.
>> So what?  You can write functions that work that way now.
>
> Also, no dupes.

The "multi" in multiset indicates that duplicate elements are
explicitly allowed and tracked.

Nicolas

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