diff options
Diffstat (limited to 'src/backend/optimizer/plan/createplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/createplan.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index c802d61c39e..4b497486a0e 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -808,6 +808,15 @@ use_physical_tlist(PlannerInfo *root, Path *path, int flags) return false; /* + * If a bitmap scan's tlist is empty, keep it as-is. This may allow the + * executor to skip heap page fetches, and in any case, the benefit of + * using a physical tlist instead would be minimal. + */ + if (IsA(path, BitmapHeapPath) && + path->pathtarget->exprs == NIL) + return false; + + /* * Can't do it if any system columns or whole-row Vars are requested. * (This could possibly be fixed but would take some fragile assumptions * in setrefs.c, I think.) |