Remove ugly call ImmediateSharedRelationCacheInvalidate()

from md.c.

Author: Hiroshi Inoue

src/backend/storage/smgr/md.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.63 2000/01/26 05:57:05 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.64 2000/02/07 02:38:18 inoue Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -205,15 +205,6 @@ mdunlink(Relation reln)
 	 */
 	if (reln->rd_unlinked && reln->rd_fd < 0)
 		return SM_SUCCESS;
-	/*
-	 * This call isn't good for independency of md stuff,but 
-	 * mdunlink() unlinks the base file immediately and couldn't
-	 * be rollbacked in case of abort. We must guarantee all
-	 * backends' relation cache invalidation here.
-	 * This would be unnecessary if unlinking is postponed
-	 * till end of transaction.
-	 */
-	ImmediateSharedRelationCacheInvalidate(reln);
 	/*
 	 * Force all segments of the relation to be opened, so that we
 	 * won't miss deleting any of them.
@@ -786,7 +777,6 @@ mdtruncate(Relation reln, int nblocks)
 #ifndef LET_OS_MANAGE_FILESIZE
 	MemoryContext oldcxt;
 	int			priorblocks;
-	bool	invalregistered = false;
 #endif
 
 	/* NOTE: mdnblocks makes sure we have opened all existing segments,
@@ -818,20 +808,6 @@ mdtruncate(Relation reln, int nblocks)
 			 * a big file...
 			 */
 			FileTruncate(v->mdfd_vfd, 0);
-			/*
-	 		 * To call ImmediateSharedRelationCacheInvalidate() here
-			 * isn't good for independency of md stuff,but smgrunlink()
-			 * removes the base file immediately and couldn't be
-			 * rollbacked in case of abort. We must guarantee
-	 		 * all backends' relation cache invalidation here.
-	 		 * This would be unnecessary if the truncation is postponed
-	 		 * till end of transaction.
-	 		 */
-			if (!invalregistered)
-			{
-				ImmediateSharedRelationCacheInvalidate(reln);
-				invalregistered = true;
-			}
 			FileUnlink(v->mdfd_vfd);
 			v = v->mdfd_chain;
 			Assert(ov != &Md_fdvec[fd]); /* we never drop the 1st segment */