Re: Adding argument names to aggregate functions

Daniel Gustafsson <daniel@yesql.se> writes:

> This patch no longer applied but had a fairly trivial conflict so I've attached
> a rebased v3 addressing the conflict in the hopes of getting this further.

Thanks for the heads-up!  Turns out the conflict was due to the new
json(b)_object_agg(_unique)(_strict) functions, which should also have
proargnames added.  Here's an updated patch that does that.

- ilmari

From 2da3bada4f2a9425cbaa925a51f78773e4e16dfb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dagfinn=20Ilmari=20Manns=C3=A5ker?= <ilmari@ilmari.org>
Date: Mon, 27 Feb 2023 13:06:29 +0000
Subject: [PATCH v4] Add argument names to multi-argument aggregates

This makes it easier to see which way around the arguments go when
using \dfa.  This is particularly relevant for string_agg(), but add
it to json(b)_object_agg() too for good measure.
---
 src/include/catalog/pg_proc.dat | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 6996073989..3e283671dc 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -4992,7 +4992,7 @@
 { oid => '3538', descr => 'concatenate aggregate input into a string',
   proname => 'string_agg', prokind => 'a', proisstrict => 'f',
   prorettype => 'text', proargtypes => 'text text',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{value,delimiter}', prosrc => 'aggregate_dummy' },
 { oid => '3543', descr => 'aggregate transition function',
   proname => 'bytea_string_agg_transfn', proisstrict => 'f',
   prorettype => 'internal', proargtypes => 'internal bytea bytea',
@@ -5004,7 +5004,7 @@
 { oid => '3545', descr => 'concatenate aggregate input into a bytea',
   proname => 'string_agg', prokind => 'a', proisstrict => 'f',
   prorettype => 'bytea', proargtypes => 'bytea bytea',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{value,delimiter}', prosrc => 'aggregate_dummy' },
 
 # To ASCII conversion
 { oid => '1845', descr => 'encode text from DB encoding to ASCII text',
@@ -8953,21 +8953,22 @@
 { oid => '3197', descr => 'aggregate input into a json object',
   proname => 'json_object_agg', prokind => 'a', proisstrict => 'f',
   provolatile => 's', prorettype => 'json', proargtypes => 'any any',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{key,value}', prosrc => 'aggregate_dummy' },
 { oid => '6280', descr => 'aggregate non-NULL input into a json object',
   proname => 'json_object_agg_strict', prokind => 'a', proisstrict => 'f',
   provolatile => 's', prorettype => 'json', proargtypes => 'any any',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{key,value}', prosrc => 'aggregate_dummy' },
 { oid => '6281',
   descr => 'aggregate input into a json object with unique keys',
   proname => 'json_object_agg_unique', prokind => 'a', proisstrict => 'f',
   provolatile => 's', prorettype => 'json', proargtypes => 'any any',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{key,value}', prosrc => 'aggregate_dummy' },
 { oid => '6282',
   descr => 'aggregate non-NULL input into a json object with unique keys',
   proname => 'json_object_agg_unique_strict', prokind => 'a',
   proisstrict => 'f', provolatile => 's', prorettype => 'json',
-  proargtypes => 'any any', prosrc => 'aggregate_dummy' },
+  proargtypes => 'any any', proargnames => '{key,value}',
+  prosrc => 'aggregate_dummy' },
 { oid => '3198', descr => 'build a json array from any inputs',
   proname => 'json_build_array', provariadic => 'any', proisstrict => 'f',
   provolatile => 's', prorettype => 'json', proargtypes => 'any',
@@ -9881,22 +9882,22 @@
   prosrc => 'jsonb_object_agg_finalfn' },
 { oid => '3270', descr => 'aggregate inputs into jsonb object',
   proname => 'jsonb_object_agg', prokind => 'a', proisstrict => 'f',
-  prorettype => 'jsonb', proargtypes => 'any any',
+  prorettype => 'jsonb', proargtypes => 'any any', proargnames => '{key,value}',
   prosrc => 'aggregate_dummy' },
 { oid => '6288', descr => 'aggregate non-NULL inputs into jsonb object',
   proname => 'jsonb_object_agg_strict', prokind => 'a', proisstrict => 'f',
-  prorettype => 'jsonb', proargtypes => 'any any',
+  prorettype => 'jsonb', proargtypes => 'any any', proargnames => '{key,value}',
   prosrc => 'aggregate_dummy' },
 { oid => '6289',
   descr => 'aggregate inputs into jsonb object checking key uniqueness',
   proname => 'jsonb_object_agg_unique', prokind => 'a', proisstrict => 'f',
-  prorettype => 'jsonb', proargtypes => 'any any',
+  prorettype => 'jsonb', proargtypes => 'any any', proargnames => '{key,value}',
   prosrc => 'aggregate_dummy' },
 { oid => '6290',
   descr => 'aggregate non-NULL inputs into jsonb object checking key uniqueness',
   proname => 'jsonb_object_agg_unique_strict', prokind => 'a',
   proisstrict => 'f', prorettype => 'jsonb', proargtypes => 'any any',
-  prosrc => 'aggregate_dummy' },
+  proargnames => '{key,value}', prosrc => 'aggregate_dummy' },
 { oid => '3271', descr => 'build a jsonb array from any inputs',
   proname => 'jsonb_build_array', provariadic => 'any', proisstrict => 'f',
   provolatile => 's', prorettype => 'jsonb', proargtypes => 'any',
-- 
2.39.2