Add missing handling of PlannedStmt.transientPlan in copyfuncs/outfuncs.

_outPlannedStmt is only debug support, so the omission there was not very
serious, but the omission in _copyPlannedStmt is a real bug.  The consequence
would be that a copied plan tree would never be marked as a transient plan,
so that we would forget we ought to replan it after some not-yet-ready index
becomes ready for use.  This might explain some past complaints about indexes
created with CREATE INDEX CONCURRENTLY not being used right away.  Problem
spotted by Yeb Havinga.

Back-patch to 8.3, where the field was added.

src/backend/nodes/copyfuncs.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.467 2010/08/07 02:44:06 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.468 2010/08/18 15:21:54 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -79,6 +79,7 @@ _copyPlannedStmt(PlannedStmt *from)
 	COPY_SCALAR_FIELD(commandType);
 	COPY_SCALAR_FIELD(hasReturning);
 	COPY_SCALAR_FIELD(canSetTag);
+	COPY_SCALAR_FIELD(transientPlan);
 	COPY_NODE_FIELD(planTree);
 	COPY_NODE_FIELD(rtable);
 	COPY_NODE_FIELD(resultRelations);

src/backend/nodes/outfuncs.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.388 2010/08/07 02:44:06 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.389 2010/08/18 15:21:54 tgl Exp $
  *
  * NOTES
  *	  Every node type that can appear in stored rules' parsetrees *must*
@@ -244,6 +244,7 @@ _outPlannedStmt(StringInfo str, PlannedStmt *node)
 	WRITE_ENUM_FIELD(commandType, CmdType);
 	WRITE_BOOL_FIELD(hasReturning);
 	WRITE_BOOL_FIELD(canSetTag);
+	WRITE_BOOL_FIELD(transientPlan);
 	WRITE_NODE_FIELD(planTree);
 	WRITE_NODE_FIELD(rtable);
 	WRITE_NODE_FIELD(resultRelations);