Fix heap_page_prune's problem with failing to send cache invalidation

messages if the calling transaction aborts later on.  Collapsing out line
pointer redirects is a done deal as soon as we complete the page update,
so syscache *must* be notified even if the VACUUM FULL as a whole doesn't
complete.  To fix, add some functionality to inval.c to allow the pending
inval messages to be sent immediately while heap_page_prune is still
running.  The implementation is a bit chintzy: it will only work in the
context of VACUUM FULL.  But that's all we need now, and it can always be
extended later if needed.  Per my trouble report of a week ago.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/include/utils/inval.h b/src/include/utils/inval.h
index df0e5f397b3..a8a5ff0b410 100644
--- a/src/include/utils/inval.h
+++ b/src/include/utils/inval.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/inval.h,v 1.41 2008/01/01 19:45:59 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/utils/inval.h,v 1.41.2.1 2008/03/13 18:00:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -37,6 +37,10 @@ extern void PostPrepare_Inval(void);
 
 extern void CommandEndInvalidationMessages(void);
 
+extern void BeginNonTransactionalInvalidation(void);
+
+extern void EndNonTransactionalInvalidation(void);
+
 extern void CacheInvalidateHeapTuple(Relation relation, HeapTuple tuple);
 
 extern void CacheInvalidateRelcache(Relation relation);