From 52ac676bdef1aa0a1fa18520a69d267fbb93eb19 Mon Sep 17 00:00:00 2001 From: Justin Pryzby Date: Fri, 3 Jan 2020 09:53:31 -0600 Subject: [PATCH v1] explain: show index_total_cost --- 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