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Propagate sort instrumentation from workers back to leader.

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Up until now, when parallel query was used, no details about the
sort method or space used by the workers were available; details
were shown only for any sorting done by the leader.  Fix that.

Commit 1177ab1dab forced the test case
added by commit 1f6d515a67 to run
without parallelism; now that we have this infrastructure, allow
that again, with a little tweaking to make it pass with and without
force_parallel_mode.

Robert Haas and Tom Lane

Discussion: http://postgr.es/m/CA+Tgmoa2VBZW6S8AAXfhpHczb=Rf6RqQ2br+zJvEgwJ0uoD_tQ@mail.gmail.com
This commit is contained in:
Robert Haas
2017-08-29 13:22:49 -04:00
parent 3452dc5240
commit bf11e7ee2e
9 changed files with 342 additions and 87 deletions
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7
src/include/executor/nodeSort.h
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@@ -14,6 +14,7 @@
#ifndef NODESORT_H
#define NODESORT_H
#include "access/parallel.h"
#include "nodes/execnodes.h"
extern SortState *ExecInitSort(Sort *node, EState *estate, int eflags);
@@ -22,4 +23,10 @@ extern void ExecSortMarkPos(SortState *node);
extern void ExecSortRestrPos(SortState *node);
extern void ExecReScanSort(SortState *node);
/* parallel instrumentation support */
extern void ExecSortEstimate(SortState *node, ParallelContext *pcxt);
extern void ExecSortInitializeDSM(SortState *node, ParallelContext *pcxt);
extern void ExecSortInitializeWorker(SortState *node, shm_toc *toc);
extern void ExecSortRetrieveInstrumentation(SortState *node);
#endif /* NODESORT_H */