planner: fix incorrect estRows with global index and json column (pin…

…gcap#55842) close pingcap#55818
Benjamin2037 · Sep 6, 2024 · dd18083 · dd18083
1 parent 4dc8f3d
commit dd18083
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Showing 3 changed files with 97 additions and 2 deletions.
diff --git a/pkg/statistics/table.go b/pkg/statistics/table.go
@@ -755,7 +755,11 @@ func (coll *HistColl) GetScaledRealtimeAndModifyCnt(idxStats *Index) (realtimeCn
 	if analyzeRowCount <= 0 {
 		return coll.RealtimeCount, coll.ModifyCount
 	}
-	scale := idxStats.TotalRowCount() / analyzeRowCount
+	idxTotalRowCount := idxStats.TotalRowCount()
+	if idxTotalRowCount <= 0 {
+		return coll.RealtimeCount, coll.ModifyCount
+	}
+	scale := idxTotalRowCount / analyzeRowCount
 	return int64(float64(coll.RealtimeCount) * scale), int64(float64(coll.ModifyCount) * scale)
 }
 

diff --git a/tests/integrationtest/r/planner/core/issuetest/planner_issue.result b/tests/integrationtest/r/planner/core/issuetest/planner_issue.result
diff --git a/tests/integrationtest/t/planner/core/issuetest/planner_issue.test b/tests/integrationtest/t/planner/core/issuetest/planner_issue.test