Sort default partition to bottom of psql \d+

Minor patch to change sort order only

Author: Ashutosh Bapat
Reviewed-by:  Álvaro Herrera, Simon Riggs

Author: simonat2ndQuadrant

src/bin/psql/describe.c

@@ -2875,7 +2875,8 @@ describeOneTableDetails(const char *schemaname,
 							  "       c.relkind"
 							  " FROM pg_catalog.pg_class c, pg_catalog.pg_inherits i"
 							  " WHERE c.oid=i.inhrelid AND i.inhparent = '%s'"
-							  " ORDER BY c.oid::pg_catalog.regclass::pg_catalog.text;", oid);
+							  " ORDER BY pg_catalog.pg_get_expr(c.relpartbound, c.oid) = 'DEFAULT',"
+							  "          c.oid::pg_catalog.regclass::pg_catalog.text;", oid);
 		else if (pset.sversion >= 80300)
 			printfPQExpBuffer(&buf,
 							  "SELECT c.oid::pg_catalog.regclass"

src/test/regress/expected/insert.out

@@ -436,11 +436,11 @@ from hash_parted order by part;
 Partition key: LIST (lower(a))
 Partitions: part_aa_bb FOR VALUES IN ('aa', 'bb'),
             part_cc_dd FOR VALUES IN ('cc', 'dd'),
-            part_default DEFAULT, PARTITIONED,
             part_ee_ff FOR VALUES IN ('ee', 'ff'), PARTITIONED,
             part_gg FOR VALUES IN ('gg'), PARTITIONED,
             part_null FOR VALUES IN (NULL),
-            part_xx_yy FOR VALUES IN ('xx', 'yy'), PARTITIONED
+            part_xx_yy FOR VALUES IN ('xx', 'yy'), PARTITIONED,
+            part_default DEFAULT, PARTITIONED
 
 -- cleanup
 drop table range_parted, list_parted;