diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/path/indxpath.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c index eaf4e1cb337..75f2487757e 100644 --- a/src/backend/optimizer/path/indxpath.c +++ b/src/backend/optimizer/path/indxpath.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/path/indxpath.c,v 1.207 2006/06/06 17:59:57 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/path/indxpath.c,v 1.208 2006/06/07 17:08:07 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -674,20 +674,18 @@ bitmap_path_comparator(const void *a, const void *b) Cost bcost; Selectivity aselec; Selectivity bselec; - Selectivity diff; cost_bitmap_tree_node(pa, &acost, &aselec); cost_bitmap_tree_node(pb, &bcost, &bselec); /* - * Since selectivities are often pretty crude, don't put blind faith - * in them; if the selectivities are within 1% of being the same, treat - * them as equal and sort by cost instead. + * If selectivities are the same, sort by cost. (Note: there used to be + * logic here to do "fuzzy comparison", but that's a bad idea because it + * fails to be transitive, which will confuse qsort terribly.) */ - diff = aselec - bselec; - if (diff < -0.01) + if (aselec < bselec) return -1; - if (diff > 0.01) + if (aselec > bselec) return 1; if (acost < bcost) |