Re: psql display of foreign keys

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
Cc: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Michael Paquier <michael(at)paquier(dot)xyz>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: psql display of foreign keys
Date: 2019-03-26 01:57:29
Message-ID: 20190326015729.GA3118@alvherre.pgsql
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On 2019-Mar-25, Alvaro Herrera wrote:

> v9 attached; this one's final AFAICT.

Actually, I propose this fixup. It doesn't change the current output,
but of course it affects how this works with my patch in
https://postgr.es/m/20190321215420.GA22766@alvherre.pgsql
The v9 patch does not show anything for the partitions of the referenced
partitioned table; with this one it shows like this

-- verify psql behaves sanely
\d droppk
Partitioned table "regress_fk.droppk"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | not null |
Partition key: RANGE (a)
Indexes:
"droppk_pkey" PRIMARY KEY, btree (a)
Referenced by:
TABLE "dropfk" CONSTRAINT "dropfk_a_fkey" FOREIGN KEY (a) REFERENCES droppk(a)
Number of partitions: 3 (Use \d+ to list them.)

\d droppk21
Table "regress_fk.droppk21"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | not null |
Partition of: droppk2 FOR VALUES FROM (1000) TO (1400)
Indexes:
"droppk21_pkey" PRIMARY KEY, btree (a)
Referenced by:
TABLE "dropfk" CONSTRAINT "dropfk_a_fkey" FOREIGN KEY (a) REFERENCES droppk(a)

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Attachment Content-Type Size
fixup.patch text/x-diff 1.2 KB

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