/*
* tbm_add_page - add a whole page to a TIDBitmap
*
* This causes the whole page to be reported (with the recheck flag)
* when the TIDBitmap is scanned.
*/
void
tbm_add_page(TIDBitmap *tbm, BlockNumber pageno)
{
/* Enter the page in the bitmap, or mark it lossy if already present */
tbm_mark_page_lossy(tbm, pageno);
/* If we went over the memory limit, lossify some more pages */
if (tbm->nentries > tbm->maxentries)
tbm_lossify(tbm);
}
/*
* tbm_add_tuples - add some tuple IDs to a HashBitmap
*/
void
tbm_add_tuples(HashBitmap *tbm, const ItemPointer tids, int ntids)
{
int i;
Assert(!tbm->iterating);
for (i = 0; i < ntids; i++)
{
BlockNumber blk = ItemPointerGetBlockNumber(tids + i);
OffsetNumber off = ItemPointerGetOffsetNumber(tids + i);
PagetableEntry *page;
int wordnum,
bitnum;
/* safety check to ensure we don't overrun bit array bounds */
/* UNDONE: Turn this off until we convert this module to AO TIDs. */
#if 0
if (off < 1 || off > MAX_TUPLES_PER_PAGE)
elog(ERROR, "tuple offset out of range: %u", off);
#endif
if (tbm_page_is_lossy(tbm, blk))
continue; /* whole page is already marked */
page = tbm_get_pageentry(tbm, blk);
if (page->ischunk)
{
/* The page is a lossy chunk header, set bit for itself */
wordnum = bitnum = 0;
}
else
{
/* Page is exact, so set bit for individual tuple */
wordnum = WORDNUM(off - 1);
bitnum = BITNUM(off - 1);
}
page->words[wordnum] |= ((tbm_bitmapword) 1 << bitnum);
if (tbm->nentries > tbm->maxentries)
tbm_lossify(tbm);
}
}
