Date: Mon, 18 Sep 2017 00:34:29 +0300
From: Arthur Zakirov <a.zakirov@postgrespro.ru>
To: Dmitry Dolgov <9erthalion6@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, David Steele <david@pgmasters.net>,
	Peter Eisentraut <peter.eisentraut@2ndquadrant.com>,
	PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: [PATCH] Generic type subscripting
Message-ID: <20170917213427.GA4430@arthur.localdomain>
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On Sun, Sep 17, 2017 at 12:27:58AM +0200, Dmitry Dolgov wrote:
> spite of what form this step will be. Maybe it's possible to make something
> like `CREATE FUNCTION ... FOR SUBSCRIPTING`, then verify that assign/extract
> functions are presented and notify user if he missed them (but I would
> rather
> not do this unless it's really necessary, since it looks like an overkill).
> 
> But I'm open to any suggestions, do you have something in mind?

I have put some thought into it. What about the following syntax?

CREATE SUBSCRIPTING FOR type_name
  INITFUNC = subscripting_init_func
  FETCHFUNC = subscripting_fetch_func
  ASSIGNFUNC = subscripting_assign_func
DROP SUBSCRIPTING FOR type_name

But I am not if the community will like such syntax.

-- 
Arthur Zakirov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company


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