Create a new GUC variable search_path to control the namespace search

path.  The default behavior if no per-user schemas are created is that
all users share a 'public' namespace, thus providing behavior backwards
compatible with 7.2 and earlier releases.  Probably the semantics and
default setting will need to be fine-tuned, but this is a start.

src/backend/access/transam/xact.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.119 2002/03/31 06:26:29 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.120 2002/04/01 03:34:25 tgl Exp $
  *
  * NOTES
  *		Transaction aborts can now occur two ways:
@@ -241,8 +241,10 @@ bool		AMI_OVERRIDE = false;
  * ----------------------------------------------------------------
  */
 
+#ifdef NOT_USED
+
 /* --------------------------------
- *		TranactionFlushEnabled()
+ *		TransactionFlushEnabled()
  *		SetTransactionFlushEnabled()
  *
  *		These are used to test and set the "TransactionFlushState"
@@ -261,13 +263,14 @@ TransactionFlushEnabled(void)
 	return TransactionFlushState;
 }
 
-#ifdef NOT_USED
 void
 SetTransactionFlushEnabled(bool state)
 {
 	TransactionFlushState = (state == true);
 }
 
+#endif
+
 
 /* --------------------------------
  *		IsTransactionState
@@ -300,7 +303,6 @@ IsTransactionState(void)
 	 */
 	return false;
 }
-#endif
 
 /* --------------------------------
  *		IsAbortedTransactionBlockState