Fix a missing article in the documentation

Per complaint from Grant Gryczan.

It's a very old typo; backpatch all the way back.

Author: Laurenz Albe <laurenz.albe@cybertec.at>
Discussion: https://postgr.es/m/172179789219.915368.16590585529628354757@wrigleys.postgresql.org

diff --git a/doc/src/sgml/parallel.sgml b/doc/src/sgml/parallel.sgml
index 5acc9537d6f283046b4b757e0b07256a3e6781a4..35dded0d27875fff9682b1d538cea40b2b39aaac 100644 (file)
--- a/doc/src/sgml/parallel.sgml
+++ b/doc/src/sgml/parallel.sgml
@@ -202,7 +202,7 @@ EXPLAIN SELECT * FROM pgbench_accounts WHERE filler LIKE '%x%';
   </itemizedlist>
 
   <para>
-    Even when parallel query plan is generated for a particular query, there
+    Even when a parallel query plan is generated for a particular query, there
     are several circumstances under which it will be impossible to execute
     that plan in parallel at execution time.  If this occurs, the leader
     will execute the portion of the plan below the <literal>Gather</literal>