*** ./src/backend/nodes/tidbitmap.c.orig	Sat Jul 23 12:38:58 2005
--- ./src/backend/nodes/tidbitmap.c	Sat Jul 23 12:41:16 2005
***************
*** 135,141 ****
  
  /* Local function prototypes */
  static void tbm_union_page(TIDBitmap *a, const PagetableEntry *bpage);
! static bool tbm_intersect_page(PagetableEntry *apage, const TIDBitmap *b);
  static const PagetableEntry *tbm_find_pageentry(const TIDBitmap *tbm,
  												BlockNumber pageno);
  static PagetableEntry *tbm_get_pageentry(TIDBitmap *tbm, BlockNumber pageno);
--- 135,141 ----
  
  /* Local function prototypes */
  static void tbm_union_page(TIDBitmap *a, const PagetableEntry *bpage);
! static bool tbm_intersect_page(TIDBitmap *a, PagetableEntry *apage, const TIDBitmap *b);
  static const PagetableEntry *tbm_find_pageentry(const TIDBitmap *tbm,
  												BlockNumber pageno);
  static PagetableEntry *tbm_get_pageentry(TIDBitmap *tbm, BlockNumber pageno);
***************
*** 382,388 ****
  	/* Scan through chunks and pages in a, try to match to b */
  	if (a->status == TBM_ONE_PAGE)
  	{
! 		if (tbm_intersect_page(&a->entry1, b))
  		{
  			/* Page is now empty, remove it from a */
  			Assert(!a->entry1.ischunk);
--- 382,388 ----
  	/* Scan through chunks and pages in a, try to match to b */
  	if (a->status == TBM_ONE_PAGE)
  	{
! 		if (tbm_intersect_page(a, &a->entry1, b))
  		{
  			/* Page is now empty, remove it from a */
  			Assert(!a->entry1.ischunk);
***************
*** 401,407 ****
  		hash_seq_init(&status, a->pagetable);
  		while ((apage = (PagetableEntry *) hash_seq_search(&status)) != NULL)
  		{
! 			if (tbm_intersect_page(apage, b))
  			{
  				/* Page or chunk is now empty, remove it from a */
  				if (apage->ischunk)
--- 401,407 ----
  		hash_seq_init(&status, a->pagetable);
  		while ((apage = (PagetableEntry *) hash_seq_search(&status)) != NULL)
  		{
! 			if (tbm_intersect_page(a, apage, b))
  			{
  				/* Page or chunk is now empty, remove it from a */
  				if (apage->ischunk)
***************
*** 424,430 ****
   * Returns TRUE if apage is now empty and should be deleted from a
   */
  static bool
! tbm_intersect_page(PagetableEntry *apage, const TIDBitmap *b)
  {
  	const PagetableEntry *bpage;
  	int		wordnum;
--- 424,430 ----
   * Returns TRUE if apage is now empty and should be deleted from a
   */
  static bool
! tbm_intersect_page(TIDBitmap *a, PagetableEntry *apage, const TIDBitmap *b)
  {
  	const PagetableEntry *bpage;
  	int		wordnum;
***************
*** 470,475 ****
--- 470,478 ----
  	}
  	else if (tbm_page_is_lossy(b, apage->blockno))
  	{
+ 		// The apage should be marked as lossy here.
+ 		tbm_mark_page_lossy (a, apage->blockno) ;
+ 
  		/* page is lossy in b, cannot clear any bits */
  		return false;
  	}