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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2018-07-19 13:49:43 +0300 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2018-07-19 13:49:43 +0300 |
| commit | 5220bb7533f9891b1e071da6461d5c387e8f7b09 (patch) | |
| tree | bdf9a0a35879d8d1eacae28f9eac2cfdea79c3cf /src/include/nodes/execnodes.h | |
| parent | b33ef397a1698ddd06f325d0f92a6643ec55577f (diff) | |
| download | postgresql-5220bb7533f9891b1e071da6461d5c387e8f7b09.tar.gz postgresql-5220bb7533f9891b1e071da6461d5c387e8f7b09.zip | |
Expand run-time partition pruning to work with MergeAppend
This expands the support for the run-time partition pruning which was added
for Append in 499be013de to also allow unneeded subnodes of a MergeAppend
to be removed.
Author: David Rowley
Discussion: https://www.postgresql.org/message-id/CAKJS1f_F_V8D7Wu-HVdnH7zCUxhoGK8XhLLtd%3DCu85qDZzXrgg%40mail.gmail.com
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 20140a35e52..018f50bbb71 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -1106,6 +1106,12 @@ struct AppendState * slots current output tuple of each subplan * heap heap of active tuples * initialized true if we have fetched first tuple from each subplan + * noopscan true if partition pruning proved that none of the + * mergeplans can contain a record to satisfy this query. + * prune_state details required to allow partitions to be + * eliminated from the scan, or NULL if not possible. + * valid_subplans for runtime pruning, valid mergeplans indexes to + * scan. * ---------------- */ typedef struct MergeAppendState @@ -1118,6 +1124,9 @@ typedef struct MergeAppendState TupleTableSlot **ms_slots; /* array of length ms_nplans */ struct binaryheap *ms_heap; /* binary heap of slot indices */ bool ms_initialized; /* are subplans started? */ + bool ms_noopscan; + struct PartitionPruneState *ms_prune_state; + Bitmapset *ms_valid_subplans; } MergeAppendState; /* ---------------- |