Further work on connecting the free space map (which is still just a

stub) into the rest of the system.  Adopt a cleaner approach to preventing
deadlock in concurrent heap_updates: allow RelationGetBufferForTuple to
select any page of the rel, and put the onus on it to lock both buffers
in a consistent order.  Remove no-longer-needed isExtend hack from
API of ReleaseAndReadBuffer.

src/include/utils/relcache.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: relcache.h,v 1.24 2001/01/24 19:43:29 momjian Exp $
+ * $Id: relcache.h,v 1.25 2001/06/29 21:08:25 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -27,7 +27,6 @@ extern Relation RelationNodeCacheGetRelation(RelFileNode rnode);
 extern Relation RelationIdCacheGetRelation(Oid relationId);
 
 extern void RelationClose(Relation relation);
-extern void RelationForgetRelation(Oid rid);
 
 /*
  * Routines to compute/retrieve additional cached information
@@ -40,14 +39,23 @@ extern List *RelationGetIndexList(Relation relation);
 extern void RelationCacheInitialize(void);
 extern void RelationCacheInitializePhase2(void);
 
+/*
+ * Routine to create a relcache entry for an about-to-be-created relation
+ */
+extern Relation RelationBuildLocalRelation(const char *relname,
+										   TupleDesc tupDesc,
+										   Oid relid, Oid dbid,
+										   bool nailit);
+
 /*
  * Routines for flushing/rebuilding relcache entries in various scenarios
  */
+extern void RelationForgetRelation(Oid rid);
+
 extern void RelationIdInvalidateRelationCacheByRelationId(Oid relationId);
 
 extern void RelationCacheInvalidate(void);
 
-extern void RelationRegisterRelation(Relation relation);
 extern void RelationPurgeLocalRelation(bool xactComitted);
 
 extern void RelationCacheAbort(void);