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authorRobert Haas <rhaas@postgresql.org>2015-11-11 08:57:52 -0500
committerRobert Haas <rhaas@postgresql.org>2015-11-11 08:57:52 -0500
commitf0661c4e8c44c0ec7acd4ea7c82e85b265447398 (patch)
tree0a31416ab40a9be4ab0f43c6ddd73221eed9dec6 /src/backend/commands/explain.c
parentf764ecd81b2a8a1e9000d43a73ca5eec8e8008bc (diff)
downloadpostgresql-f0661c4e8c44c0ec7acd4ea7c82e85b265447398.tar.gz
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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/backend/commands/explain.c')
-rw-r--r--src/backend/commands/explain.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index 7fb8a1458df..183d3d9bcb7 100644
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -984,6 +984,8 @@ ExplainNode(PlanState *planstate, List *ancestors,
appendStringInfoString(es->str, "-> ");
es->indent += 2;
}
+ if (plan->parallel_aware)
+ appendStringInfoString(es->str, "Parallel ");
appendStringInfoString(es->str, pname);
es->indent++;
}
@@ -1000,6 +1002,8 @@ ExplainNode(PlanState *planstate, List *ancestors,
ExplainPropertyText("Subplan Name", plan_name, es);
if (custom_name)
ExplainPropertyText("Custom Plan Provider", custom_name, es);
+ if (plan->parallel_aware)
+ ExplainPropertyText("Parallel Aware", "true", es);
}
switch (nodeTag(plan))