Separate out bgwriter code into a logically separate module, rather

than being random pieces of other files.  Give bgwriter responsibility
for all checkpoint activity (other than a post-recovery checkpoint);
so this child process absorbs the functionality of the former transient
checkpoint and shutdown subprocesses.  While at it, create an actual
include file for postmaster.c, which for some reason never had its own
file before.

src/backend/tcop/utility.c

@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.217 2004/05/26 13:56:54 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.218 2004/05/29 22:48:20 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -45,6 +45,7 @@
 #include "nodes/makefuncs.h"
 #include "parser/parse_expr.h"
 #include "parser/parse_type.h"
+#include "postmaster/bgwriter.h"
 #include "rewrite/rewriteDefine.h"
 #include "rewrite/rewriteRemove.h"
 #include "storage/fd.h"
@@ -54,7 +55,7 @@
 #include "utils/guc.h"
 #include "utils/lsyscache.h"
 #include "utils/syscache.h"
-#include "access/xlog.h"
+
 
 /*
  * Error-checking support for DROP commands
@@ -892,7 +893,7 @@ ProcessUtility(Node *parsetree,
 				ereport(ERROR,
 						(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
 						 errmsg("must be superuser to do CHECKPOINT")));
-			CreateCheckPoint(false, false);
+			RequestCheckpoint(true);
 			break;
 
 		case T_ReindexStmt: