diff options
Diffstat (limited to 'src/backend/commands/explain.c')
| -rw-r--r-- | src/backend/commands/explain.c | 79 |
1 files changed, 78 insertions, 1 deletions
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c index 6408d1653b..cd9fc92923 100644 --- a/src/backend/commands/explain.c +++ b/src/backend/commands/explain.c @@ -18,7 +18,6 @@ #include "commands/defrem.h" #include "commands/prepare.h" #include "executor/hashjoin.h" -#include "executor/instrument.h" #include "foreign/fdwapi.h" #include "optimizer/clauses.h" #include "parser/parsetree.h" @@ -76,6 +75,8 @@ static void show_sort_keys_common(PlanState *planstate, List *ancestors, ExplainState *es); static void show_sort_info(SortState *sortstate, ExplainState *es); static void show_hash_info(HashState *hashstate, ExplainState *es); +static void show_instrumentation_count(const char *qlabel, int which, + PlanState *planstate, ExplainState *es); static void show_foreignscan_info(ForeignScanState *fsstate, ExplainState *es); static const char *explain_get_index_name(Oid indexId); static void ExplainScanTarget(Scan *plan, ExplainState *es); @@ -1000,9 +1001,15 @@ ExplainNode(PlanState *planstate, List *ancestors, case T_IndexScan: show_scan_qual(((IndexScan *) plan)->indexqualorig, "Index Cond", planstate, ancestors, es); + if (((IndexScan *) plan)->indexqualorig) + show_instrumentation_count("Rows Removed by Index Recheck", 2, + planstate, es); show_scan_qual(((IndexScan *) plan)->indexorderbyorig, "Order By", planstate, ancestors, es); show_scan_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); break; case T_BitmapIndexScan: show_scan_qual(((BitmapIndexScan *) plan)->indexqualorig, @@ -1011,6 +1018,9 @@ ExplainNode(PlanState *planstate, List *ancestors, case T_BitmapHeapScan: show_scan_qual(((BitmapHeapScan *) plan)->bitmapqualorig, "Recheck Cond", planstate, ancestors, es); + if (((BitmapHeapScan *) plan)->bitmapqualorig) + show_instrumentation_count("Rows Removed by Index Recheck", 2, + planstate, es); /* FALL THRU */ case T_SeqScan: case T_ValuesScan: @@ -1018,6 +1028,9 @@ ExplainNode(PlanState *planstate, List *ancestors, case T_WorkTableScan: case T_SubqueryScan: show_scan_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); break; case T_FunctionScan: if (es->verbose) @@ -1025,6 +1038,9 @@ ExplainNode(PlanState *planstate, List *ancestors, "Function Call", planstate, ancestors, es->verbose, es); show_scan_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); break; case T_TidScan: { @@ -1038,34 +1054,61 @@ ExplainNode(PlanState *planstate, List *ancestors, tidquals = list_make1(make_orclause(tidquals)); show_scan_qual(tidquals, "TID Cond", planstate, ancestors, es); show_scan_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); } break; case T_ForeignScan: show_scan_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); show_foreignscan_info((ForeignScanState *) planstate, es); break; case T_NestLoop: show_upper_qual(((NestLoop *) plan)->join.joinqual, "Join Filter", planstate, ancestors, es); + if (((NestLoop *) plan)->join.joinqual) + show_instrumentation_count("Rows Removed by Join Filter", 1, + planstate, es); show_upper_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 2, + planstate, es); break; case T_MergeJoin: show_upper_qual(((MergeJoin *) plan)->mergeclauses, "Merge Cond", planstate, ancestors, es); show_upper_qual(((MergeJoin *) plan)->join.joinqual, "Join Filter", planstate, ancestors, es); + if (((MergeJoin *) plan)->join.joinqual) + show_instrumentation_count("Rows Removed by Join Filter", 1, + planstate, es); show_upper_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 2, + planstate, es); break; case T_HashJoin: show_upper_qual(((HashJoin *) plan)->hashclauses, "Hash Cond", planstate, ancestors, es); show_upper_qual(((HashJoin *) plan)->join.joinqual, "Join Filter", planstate, ancestors, es); + if (((HashJoin *) plan)->join.joinqual) + show_instrumentation_count("Rows Removed by Join Filter", 1, + planstate, es); show_upper_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 2, + planstate, es); break; case T_Agg: case T_Group: show_upper_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); break; case T_Sort: show_sort_keys((SortState *) planstate, ancestors, es); @@ -1079,6 +1122,9 @@ ExplainNode(PlanState *planstate, List *ancestors, show_upper_qual((List *) ((Result *) plan)->resconstantqual, "One-Time Filter", planstate, ancestors, es); show_upper_qual(plan->qual, "Filter", planstate, ancestors, es); + if (plan->qual) + show_instrumentation_count("Rows Removed by Filter", 1, + planstate, es); break; case T_Hash: show_hash_info((HashState *) planstate, es); @@ -1509,6 +1555,37 @@ show_hash_info(HashState *hashstate, ExplainState *es) } /* + * If it's EXPLAIN ANALYZE, show instrumentation information for a plan node + * + * "which" identifies which instrumentation counter to print + */ +static void +show_instrumentation_count(const char *qlabel, int which, + PlanState *planstate, ExplainState *es) +{ + double nfiltered; + double nloops; + + if (!es->analyze || !planstate->instrument) + return; + + if (which == 2) + nfiltered = planstate->instrument->nfiltered2; + else + nfiltered = planstate->instrument->nfiltered1; + nloops = planstate->instrument->nloops; + + /* In text mode, suppress zero counts; they're not interesting enough */ + if (nfiltered > 0 || es->format != EXPLAIN_FORMAT_TEXT) + { + if (nloops > 0) + ExplainPropertyFloat(qlabel, nfiltered / nloops, 0, es); + else + ExplainPropertyFloat(qlabel, 0.0, 0, es); + } +} + +/* * Show extra information for a ForeignScan node. */ static void |