diff options
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 8a1f2ee047b..78188a3954d 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -1050,6 +1050,33 @@ typedef struct AppendState } AppendState; /* ---------------- + * MergeAppendState information + * + * nplans how many plans are in the array + * nkeys number of sort key columns + * scankeys sort keys in ScanKey representation + * slots current output tuple of each subplan + * heap heap of active tuples (represented as array indexes) + * heap_size number of active heap entries + * initialized true if we have fetched first tuple from each subplan + * last_slot last subplan fetched from (which must be re-called) + * ---------------- + */ +typedef struct MergeAppendState +{ + PlanState ps; /* its first field is NodeTag */ + PlanState **mergeplans; /* array of PlanStates for my inputs */ + int ms_nplans; + int ms_nkeys; + ScanKey ms_scankeys; /* array of length ms_nkeys */ + TupleTableSlot **ms_slots; /* array of length ms_nplans */ + int *ms_heap; /* array of length ms_nplans */ + int ms_heap_size; /* current active length of ms_heap[] */ + bool ms_initialized; /* are subplans started? */ + int ms_last_slot; /* last subplan slot we returned from */ +} MergeAppendState; + +/* ---------------- * RecursiveUnionState information * * RecursiveUnionState is used for performing a recursive union. |