Update some comments to use SQL examples rather than QUEL. From Simon

Riggs.

diff --git a/src/backend/executor/nodeAppend.c b/src/backend/executor/nodeAppend.c
index 9660f1efd6655f1b9ed78c6ad13f17b0d68b36b9..0f77741a82501d743ccdce60b2583a5980f6b176 100644 (file)
--- a/src/backend/executor/nodeAppend.c
+++ b/src/backend/executor/nodeAppend.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/executor/nodeAppend.c,v 1.62 2004/12/31 21:59:45 pgsql Exp $
+ *   $PostgreSQL: pgsql/src/backend/executor/nodeAppend.c,v 1.63 2005/04/24 11:46:20 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -43,7 +43,7 @@
  *     and student-emp inherits from student and employee, the
  *     query:
  *
- *             retrieve (e.name) from e in person*
+ *             select name from person
  *
  *     generates the plan:
  *

diff --git a/src/backend/executor/nodeResult.c b/src/backend/executor/nodeResult.c
index abc94a2cf12ece9e82f8601a49198129abeb8347..ee6c91cb9dc0a79153d1008a6fd3bc9e36e22564 100644 (file)
--- a/src/backend/executor/nodeResult.c
+++ b/src/backend/executor/nodeResult.c
@@ -8,15 +8,13 @@
  *     Result nodes are used in queries where no relations are scanned.
  *     Examples of such queries are:
  *
- *             retrieve (x = 1)
- *     and
- *             append emp (name = "mike", salary = 15000)
+ *             select 1 * 2
  *
  *     Result nodes are also used to optimise queries with constant
  *     qualifications (ie, quals that do not depend on the scanned data),
  *     such as:
  *
- *             retrieve (emp.all) where 2 > 1
+ *             select * from emp where 2 > 1
  *
  *     In this case, the plan generated is
  *
@@ -24,9 +22,10 @@
  *                     /
  *                SeqScan (emp.all)
  *
- *     At runtime, the Result node evaluates the constant qual once.
- *     If it's false, we can return an empty result set without running
- *     the controlled plan at all.  If it's true, we run the controlled
+ *     At runtime, the Result node evaluates the constant qual once,
+ *     which is shown by EXPLAIN as a One-Time Filter.  If it's
+ *     false, we can return an empty result set without running the
+ *     controlled plan at all.  If it's true, we run the controlled
  *     plan normally and pass back the results.
  *
  *
@@ -34,7 +33,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.29 2004/12/31 21:59:45 pgsql Exp $
+ *   $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.30 2005/04/24 11:46:21 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */