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| author | Robert Haas <rhaas@postgresql.org> | 2015-11-11 08:57:52 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2015-11-11 08:57:52 -0500 |
| commit | f0661c4e8c44c0ec7acd4ea7c82e85b265447398 (patch) | |
| tree | 0a31416ab40a9be4ab0f43c6ddd73221eed9dec6 /src/include/executor | |
| parent | f764ecd81b2a8a1e9000d43a73ca5eec8e8008bc (diff) | |
Make sequential scans parallel-aware.
In addition, this path fills in a number of missing bits and pieces in
the parallel infrastructure. Paths and plans now have a parallel_aware
flag indicating whether whatever parallel-aware logic they have should
be engaged. It is believed that we will need this flag for a number of
path/plan types, not just sequential scans, which is why the flag is
generic rather than part of the SeqScan structures specifically.
Also, execParallel.c now gives parallel nodes a chance to initialize
their PlanState nodes from the DSM during parallel worker startup.
Amit Kapila, with a fair amount of adjustment by me. Review of previous
patch versions by Haribabu Kommi and others.
Diffstat (limited to 'src/include/executor')
| -rw-r--r-- | src/include/executor/nodeSeqscan.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/executor/nodeSeqscan.h b/src/include/executor/nodeSeqscan.h index 39d12a62fcd..f8f9299b652 100644 --- a/src/include/executor/nodeSeqscan.h +++ b/src/include/executor/nodeSeqscan.h @@ -14,6 +14,7 @@ #ifndef NODESEQSCAN_H #define NODESEQSCAN_H +#include "access/parallel.h" #include "nodes/execnodes.h" extern SeqScanState *ExecInitSeqScan(SeqScan *node, EState *estate, int eflags); @@ -21,4 +22,9 @@ extern TupleTableSlot *ExecSeqScan(SeqScanState *node); extern void ExecEndSeqScan(SeqScanState *node); extern void ExecReScanSeqScan(SeqScanState *node); +/* parallel scan support */ +extern void ExecSeqScanEstimate(SeqScanState *node, ParallelContext *pcxt); +extern void ExecSeqScanInitializeDSM(SeqScanState *node, ParallelContext *pcxt); +extern void ExecSeqScanInitializeWorker(SeqScanState *node, shm_toc *toc); + #endif /* NODESEQSCAN_H */ |