Doc: Fix example related to partition pruning

Append node has been removed in v12 when there would be only one subnode
under it.

Author: Amit Langote
Discussion: https://postgr.es/m/CA+HiwqHhS62w8zUFXF4NBjvMboCXYnD-jWoWp-tfo2aHvP3Gxg@mail.gmail.com
Backpatch-through: 12

diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
index b2bab81840cddc0ec6ee9530f2ea466455a61b85..d7158c1b034b18e67635230456156fc64995b34d 100644 (file)
--- a/doc/src/sgml/ddl.sgml
+++ b/doc/src/sgml/ddl.sgml
@@ -4525,9 +4525,8 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
                                     QUERY PLAN
 -----------------------------------------------------------------------------------
  Aggregate  (cost=37.75..37.76 rows=1 width=8)
-   ->  Append  (cost=0.00..36.21 rows=617 width=0)
-         ->  Seq Scan on measurement_y2008m01  (cost=0.00..33.12 rows=617 width=0)
-               Filter: (logdate >= '2008-01-01'::date)
+   ->  Seq Scan on measurement_y2008m01  (cost=0.00..33.12 rows=617 width=0)
+         Filter: (logdate >= '2008-01-01'::date)
 </programlisting>
    </para>