Put back example of using Result node to execute an INSERT.

Author: tglsfdc

src/backend/executor/nodeResult.c

@@ -10,6 +10,11 @@
  *
  *				select 1 * 2
  *
+ *				insert into emp values ('mike', 15000)
+ *
+ *		(Remember that in an INSERT or UPDATE, we need a plan tree that
+ *		generates the new rows.)
+ *
  *		Result nodes are also used to optimise queries with constant
  *		qualifications (ie, quals that do not depend on the scanned data),
  *		such as:
@@ -20,7 +25,7 @@
  *
  *						Result	(with 2 > 1 qual)
  *						/
- *				   SeqScan (emp.all)
+ *				   SeqScan (emp.*)
  *
  *		At runtime, the Result node evaluates the constant qual once,
  *		which is shown by EXPLAIN as a One-Time Filter.  If it's
@@ -33,7 +38,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.30 2005/04/24 11:46:21 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.31 2005/04/24 15:32:07 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */