Re: MAP syntax for arrays

From: Andreas Karlsson <andreas(at)proxel(dot)se>
To: Ildar Musin <i(dot)musin(at)postgrespro(dot)ru>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MAP syntax for arrays
Date: 2018-05-08 14:22:53
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On 05/08/2018 02:49 PM, Ildar Musin wrote:
> The main point of this patch was about convenience; the performance
> thing came out later just as a side effect :) Many users are familiar
> with "map/reduce/filter" concept that many languages (not only
> functional ones) utilized. And my though was that it would be great to
> have those in postgres too.

Map is a feature I have quite often wished to have, but I am not sure it
is quite useful enough to be worth adding our own proprietary syntax. It
would be a pain if the SQL committee started using MAP for something.


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