pg.ddx.io pgsql-performance@postgresql.org mailing list archive help / color / mirror / Atom feed From: Justin Pryzby <pryzbyj@telsasoft.com>
Subject: [PATCH v1] explain: show index_total_cost
Date: Fri, 3 Jan 2020 09:53:31 -0600
---
src/backend/commands/explain.c | 3 +++
src/backend/optimizer/plan/createplan.c | 1 +
src/include/nodes/plannodes.h | 1 +
3 files changed, 5 insertions(+)
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index 0910d91..8973c86 100644
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -1614,6 +1614,9 @@ ExplainNode(PlanState *planstate, List *ancestors,
if (plan->qual)
show_instrumentation_count("Rows Removed by Filter", 1,
planstate, es);
+ if (es->costs && es->verbose) // && verbose ?
+ ExplainPropertyFloat("Index Total Cost", NULL,
+ planstate->plan->indextotalcost, 2, es);
break;
case T_IndexOnlyScan:
show_scan_qual(((IndexOnlyScan *) plan)->indexqual,
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index dff826a..c0419bc 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -2924,6 +2924,7 @@ create_indexscan_plan(PlannerInfo *root,
best_path->indexscandir);
copy_generic_path_info(&scan_plan->plan, &best_path->path);
+ ((Plan *)scan_plan)->indextotalcost = best_path->indextotalcost;
return scan_plan;
}
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h
index 32c0d87..711c9d8 100644
--- a/src/include/nodes/plannodes.h
+++ b/src/include/nodes/plannodes.h
@@ -122,6 +122,7 @@ typedef struct Plan
*/
Cost startup_cost; /* cost expended before fetching any tuples */
Cost total_cost; /* total cost (assuming all tuples fetched) */
+ Cost indextotalcost; /* total cost of index */
/*
* planner's estimate of result size of this plan step
--
2.7.4
--PNTmBPCT7hxwcZjr--
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To: pgsql-performance@postgresql.org
Cc: pryzbyj@telsasoft.com
Subject: Re: [PATCH v1] explain: show index_total_cost
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