From c9ccd270458905494b96c97da187666168ee3e57 Mon Sep 17 00:00:00 2001
From: drh <>
Date: Wed, 4 Feb 2026 17:52:50 +0000
Subject: [PATCH] Improved display of scan-status estimates.

FossilOrigin-Name: 70ef095740c62081090147bb1900c843cb31864e93a8af518ff48855f1175717
---
 ext/qrf/qrf.c | 33 ++++++++++++++++++++-------------
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 3 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/ext/qrf/qrf.c b/ext/qrf/qrf.c
index ff0a9180ee..9ab593b954 100644
--- a/ext/qrf/qrf.c
+++ b/ext/qrf/qrf.c
@@ -274,7 +274,7 @@ static void qrfApproxInt64(sqlite3_str *pOut, i64 N){
 ** Render a double r into pOut for use in scan-stats reporting.
 **
 ** If r is greater than or equal to 1000, then render using qrfApproxInt64.
-** Otherwise render using %.1f.
+** Otherwise render using %.1g.
 */
 static void qrfApproxDouble(sqlite3_str *pOut, double r){
   if( r<0.0 ){
@@ -284,7 +284,7 @@ static void qrfApproxDouble(sqlite3_str *pOut, double r){
   if( r>=1000.0 ){
     qrfApproxInt64(pOut, (i64)r);
   }else{
-    sqlite3_str_appendf(pOut, "%.1f", r);
+    sqlite3_str_appendf(pOut, "%.1g", r);
   }
 }
 
@@ -360,6 +360,8 @@ static void qrfEqpStats(Qrf *p){
   int i = 0;
   i64 nTotal = 0;
   int nWidth = 0;
+  int prevPid = -1;             /* Previous iPid */
+  double rEstCum = 1.0;         /* Cumulative row estimate */
   sqlite3_str *pLine = sqlite3_str_new(p->db);
   sqlite3_str *pStats = sqlite3_str_new(p->db);
   qrfEqpReset(p);
@@ -389,17 +391,21 @@ static void qrfEqpStats(Qrf *p){
     if( sqlite3_stmt_scanstatus_v2(pS,i,SQLITE_SCANSTAT_EXPLAIN,f,(void*)&zo) ){
       break;
     }
+    sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_PARENTID,f,(void*)&iPid);
+    if( iPid!=prevPid ){
+      prevPid = iPid;
+      rEstCum = 1.0;
+    }
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_EST,f,(void*)&rEst);
+    rEstCum *= rEst;
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_NLOOP,f,(void*)&nLoop);
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_NVISIT,f,(void*)&nRow);
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_NCYCLE,f,(void*)&nCycle);
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_SELECTID,f,(void*)&iId);
-    sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_PARENTID,f,(void*)&iPid);
     sqlite3_stmt_scanstatus_v2(pS,i, SQLITE_SCANSTAT_NAME,f,(void*)&zName);
 
     if( nCycle>=0 || nLoop>=0 || nRow>=0 ){
       const char *zSp = "";
-      double rpl;
       sqlite3_str_reset(pStats);
       if( nCycle>=0 && nTotal>0 ){
         sqlite3_str_appendf(pStats, "cycles=");
@@ -413,21 +419,22 @@ static void qrfEqpStats(Qrf *p){
         sqlite3_str_appendf(pStats, "%sloops=", zSp);
         qrfApproxInt64(pStats, nLoop);
         zSp = " ";
+        if( p->spec.eStyle==QRF_STYLE_StatsEst ){
+          sqlite3_str_appendf(pStats, " [est ");
+          qrfApproxDouble(pStats, rEstCum/rEst);
+          sqlite3_str_appendf(pStats, "]");
+        }
       }
       if( nRow>=0 ){
         sqlite3_str_appendf(pStats, "%srows=", zSp);
         qrfApproxInt64(pStats, nRow);
         zSp = " ";
+        if( p->spec.eStyle==QRF_STYLE_StatsEst ){
+          sqlite3_str_appendf(pStats, " [est ");
+          qrfApproxDouble(pStats, rEstCum);
+          sqlite3_str_appendf(pStats, "]");
+        }
       }
-
-      if( p->spec.eStyle==QRF_STYLE_StatsEst ){
-        rpl = nLoop ? (double)nRow / (double)nLoop : 0.0;
-        sqlite3_str_appendf(pStats, "%srpl=", zSp);
-        qrfApproxDouble(pStats, rpl);
-        sqlite3_str_appendf(pStats, " est=");
-        qrfApproxDouble(pStats, rEst);
-      }
-
       sqlite3_str_appendf(pLine,
           "% *s (%s)", -1*(nWidth-qrfStatsHeight(pS,i)*3), zo,
           sqlite3_str_value(pStats)
diff --git a/manifest b/manifest
index 99edf4e34a..119b648540 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Render\sscan-status\svalues\swith\s3\sor\s4\ssignificant\sdigits\sonly,\sfor\nimproved\sreadability.
-D 2026-02-04T13:35:32.765
+C Improved\sdisplay\sof\sscan-status\sestimates.
+D 2026-02-04T17:52:50.152
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -420,7 +420,7 @@ F ext/misc/zipfile.c 837591f0505d21f7f7937ea046c9b0fc594f7fa3ca00c2bd54ffa1c94bf
 F ext/misc/zorder.c bddff2e1b9661a90c95c2a9a9c7ecd8908afab5763256294dd12d609d4664eee
 F ext/qrf/README.md e6e0ce2700acf6fd06312b42726a8f08ca240f30e1b122bff87c71c602046352
 F ext/qrf/dev-notes.md e68a6d91ce4c7eb296ef2daadc2bb79c95c317ad15b9fafe40850c67b29c2430
-F ext/qrf/qrf.c 1b9df1070489d0e82abbd5eec844bf20ef65787cc44f69b02649e47dc03bde7d
+F ext/qrf/qrf.c fd014c041a2fd54c900800c69a4ef1a7611201a15a46b60b967f07abb2f7d21d
 F ext/qrf/qrf.h 2ac14b0aaacf44636d8c81051bfeab4afae50a98fbb2e10ff5aed0c28a87b2b2
 F ext/rbu/rbu.c 801450b24eaf14440d8fd20385aacc751d5c9d6123398df41b1b5aa804bf4ce8
 F ext/rbu/rbu1.test 25870dd7db7eb5597e2b4d6e29e7a7e095abf332660f67d89959552ce8f8f255
@@ -2194,8 +2194,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh d924598cf2f55a4ecbc2aeb055c10bd5f48114793e7ba25f9585435da29e7e98
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P 611cef0ec281ae06eac97df8048d617fd445c348c2fc1673202b9cc081a365db
-R 948a2925b6f14b356c852d71e9b3a7e0
+P d9102ff0c43a496e782b0a3ec86ba7cd45f8118a07f15a4f3d58b399466d6cf2
+R 71c5e12c89ae4ea6f7261fec39f95a65
 U drh
-Z acac1c8caf17f6287150425d80569e65
+Z 78c49827531e9bf57fc9db5a8c807286
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 603a58b399..b22bf676c5 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-d9102ff0c43a496e782b0a3ec86ba7cd45f8118a07f15a4f3d58b399466d6cf2
+70ef095740c62081090147bb1900c843cb31864e93a8af518ff48855f1175717
-- 
2.47.3