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| author | Robert Haas <rhaas@postgresql.org> | 2017-10-27 16:04:01 +0200 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2017-10-27 16:04:10 +0200 |
| commit | 965a16fa9f8c316c30f4ada3c1c98b5dd4666f25 (patch) | |
| tree | e38839a9e424572faf810e0f9bb3b7d2c84320f4 /src/include/nodes/execnodes.h | |
| parent | 6a81ba1d4d26b46636d652a3a56143c159da899c (diff) | |
Fix mistaken failure to allow parallelism in corner case.
If we try to run a parallel plan in serial mode because, for example,
it's going to be scanned via a cursor, but for some reason we're
already in parallel mode (for example because an outer query is
running in parallel), we'd incorrectly try to launch workers.
Fix by adding a flag to the EState, so that we can be certain that
ExecutePlan() and ExecGather()/ExecGatherMerge() will have the same
idea about whether we are executing serially or in parallel.
Report and fix by Amit Kapila with help from Kuntal Ghosh. A few
tweaks by me.
Discussion: http://postgr.es/m/CAA4eK1+_BuZrmVCeua5Eqnm4Co9DAXdM5HPAOE2J19ePbR912Q@mail.gmail.com
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 9c790baaaa5..4f5da00c863 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -507,6 +507,8 @@ typedef struct EState bool *es_epqTupleSet; /* true if EPQ tuple is provided */ bool *es_epqScanDone; /* true if EPQ tuple has been fetched */ + bool es_use_parallel_mode; /* can we use parallel workers? */ + /* The per-query shared memory area to use for parallel execution. */ struct dsa_area *es_query_dsa; } EState; |