Re: psql display of foreign keys

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/
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