diff options
| author | Robert Haas | 2017-03-08 17:05:43 +0000 |
|---|---|---|
| committer | Robert Haas | 2017-03-08 17:05:43 +0000 |
| commit | f35742ccb7aa53ee3ed8416bbb378b0c3eeb6bb9 (patch) | |
| tree | 66c88951dd3b1546159869072e8ff3e3b506568b /src/include/optimizer | |
| parent | 4eafdcc27608dfb8a3afa3155d6ae07f66179782 (diff) | |
Support parallel bitmap heap scans.
The index is scanned by a single process, but then all cooperating
processes can iterate jointly over the resulting set of heap blocks.
In the future, we might also want to support using a parallel bitmap
index scan to set up for a parallel bitmap heap scan, but that's a
job for another day.
Dilip Kumar, with some corrections and cosmetic changes by me. The
larger patch set of which this is a part has been reviewed and tested
by (at least) Andres Freund, Amit Khandekar, Tushar Ahuja, Rafia
Sabih, Haribabu Kommi, Thomas Munro, and me.
Discussion: http://postgr.es/m/CAFiTN-uc4=0WxRGfCzs-xfkMYcSEWUC-Fon6thkJGjkh9i=13A@mail.gmail.com
Diffstat (limited to 'src/include/optimizer')
| -rw-r--r-- | src/include/optimizer/pathnode.h | 3 | ||||
| -rw-r--r-- | src/include/optimizer/paths.h | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/src/include/optimizer/pathnode.h b/src/include/optimizer/pathnode.h index befe5781416..f0fe8307224 100644 --- a/src/include/optimizer/pathnode.h +++ b/src/include/optimizer/pathnode.h @@ -53,7 +53,8 @@ extern BitmapHeapPath *create_bitmap_heap_path(PlannerInfo *root, RelOptInfo *rel, Path *bitmapqual, Relids required_outer, - double loop_count); + double loop_count, + int parallel_degree); extern BitmapAndPath *create_bitmap_and_path(PlannerInfo *root, RelOptInfo *rel, List *bitmapquals); diff --git a/src/include/optimizer/paths.h b/src/include/optimizer/paths.h index bc0dcf4468f..247fd118793 100644 --- a/src/include/optimizer/paths.h +++ b/src/include/optimizer/paths.h @@ -56,6 +56,8 @@ extern RelOptInfo *standard_join_search(PlannerInfo *root, int levels_needed, extern void generate_gather_paths(PlannerInfo *root, RelOptInfo *rel); extern int compute_parallel_worker(RelOptInfo *rel, BlockNumber heap_pages, BlockNumber index_pages); +extern void create_partial_bitmap_paths(PlannerInfo *root, RelOptInfo *rel, + Path *bitmapqual); #ifdef OPTIMIZER_DEBUG extern void debug_print_rel(PlannerInfo *root, RelOptInfo *rel); |