Re: [HACKERS] [PATCH] Generic type subscripting

From: Dmitry Dolgov <9erthalion6(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Arthur Zakirov <a(dot)zakirov(at)postgrespro(dot)ru>, Oleg Bartunov <obartunov(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, David Steele <david(at)pgmasters(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] [PATCH] Generic type subscripting
Date: 2018-01-04 15:47:50
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> On 4 January 2018 at 03:05, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I wonder what happened to the plan to separate assignment and fetch into two
> different node types. I can see that that didn't happen so far as primnodes.h
> is concerned, but you've made some changes that seem to assume it did happen.

There was one version of this patch that followed this plan. It turns out that
it's quite unnatural approach (at least within the current implementation),
because I had to duplicate or reuse a lot of code for those two node types.
Eventually we decided to play it back. Unfortunately, I did it somehow sloppy
and forgot about those simple cases, thank you for noticing!

> I'm not terribly happy with the cosmetics of this patch at the moment.
> There are too many places where it's achingly obvious that you did
> s/ArrayRef/SubscriptingRef/g and nothing else, leaving code that does not
> pass the test of "does it look like it was written like that to begin
> with".

Yes, I paid not enough attention to these small details. I cleaned this up to
make it easier for a native speaker. Here is a new rebased version of the patch
with incorporated improvements that you've mentioned.

Attachment Content-Type Size
0001-Base-implementation-of-subscripting-mechanism-v4.patch application/octet-stream 174.2 KB
0002-Subscripting-for-array-v4.patch application/octet-stream 12.9 KB
0003-Subscripting-for-jsonb-v4.patch application/octet-stream 32.5 KB
0004-Subscripting-documentation-v4.patch application/octet-stream 21.3 KB

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