diff options
Diffstat (limited to 'src/backend/nodes/tidbitmap.c')
| -rw-r--r-- | src/backend/nodes/tidbitmap.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/backend/nodes/tidbitmap.c b/src/backend/nodes/tidbitmap.c index e214bbb7634..e56b4696b4f 100644 --- a/src/backend/nodes/tidbitmap.c +++ b/src/backend/nodes/tidbitmap.c @@ -32,7 +32,7 @@ * Copyright (c) 2003-2009, PostgreSQL Global Development Group * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/tidbitmap.c,v 1.17 2009/01/10 21:08:36 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/tidbitmap.c,v 1.18 2009/03/24 20:17:14 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -310,6 +310,22 @@ tbm_add_tuples(TIDBitmap *tbm, const ItemPointer tids, int ntids, } /* + * 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_union - set union * * a is modified in-place, b is not changed @@ -496,7 +512,7 @@ tbm_intersect_page(TIDBitmap *a, PagetableEntry *apage, const TIDBitmap *b) { /* * Some of the tuples in 'a' might not satisfy the quals for 'b', - * but because the page 'b' is lossy, we don't know which ones. + * but because the page 'b' is lossy, we don't know which ones. * Therefore we mark 'a' as requiring rechecks, to indicate that * at most those tuples set in 'a' are matches. */ |