diff options
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 6a0d590ef2..f856f6036f 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -2095,6 +2095,35 @@ typedef struct GatherState } GatherState; /* ---------------- + * GatherMergeState information + * + * Gather merge nodes launch 1 or more parallel workers, run a + * subplan which produces sorted output in each worker, and then + * merge the results into a single sorted stream. + * ---------------- + */ +struct GMReaderTuple; + +typedef struct GatherMergeState +{ + PlanState ps; /* its first field is NodeTag */ + bool initialized; + struct ParallelExecutorInfo *pei; + int nreaders; + int nworkers_launched; + struct TupleQueueReader **reader; + TupleDesc tupDesc; + TupleTableSlot **gm_slots; + struct binaryheap *gm_heap; /* binary heap of slot indices */ + bool gm_initialized; /* gather merge initilized ? */ + bool need_to_scan_locally; + int gm_nkeys; + SortSupport gm_sortkeys; /* array of length ms_nkeys */ + struct GMReaderTupleBuffer *gm_tuple_buffers; /* tuple buffer per + * reader */ +} GatherMergeState; + +/* ---------------- * HashState information * ---------------- */ |