diff --git a/benches/query_benchmarks.rs b/benches/query_benchmarks.rs
index c25ae00..0fc385f 100644
--- a/benches/query_benchmarks.rs
+++ b/benches/query_benchmarks.rs
@@ -134,7 +134,7 @@ fn bench_multiple_updates(c: &mut Criterion) {
 
 fn bench_sum(c: &mut Criterion) {
     let mut group = c.benchmark_group("sum operation");
-    for size in [10, 100, 1000].iter() {
+    for size in [10, 100, 1_000, 10_000, 100_000].iter() {
         group.bench_with_input(format!("sum {} records", size), size, |b, &size| {
             b.iter_with_setup(
                 || {
diff --git a/src/table.rs b/src/table.rs
index f5b8aa2..161b5b1 100644
--- a/src/table.rs
+++ b/src/table.rs
@@ -500,6 +500,20 @@ mod tests {
         assert_eq!(table.sum(1, 2, 1), 25);
     }
 
+    #[test]
+    fn large_sum_test() {
+        let mut db = RDatabase::new();
+        let table_ref = db.create_table("Scores".to_string(), 2, 0);
+        let mut table = table_ref.table.write().unwrap();
+
+        for x in 0..100_000 {
+            table.write(vec![x, x]);
+        }
+
+        let v = table.sum(0, 100_000, 0);
+        assert_eq!((100_000 - 1) * 100_000 / 2, v);
+    }
+
     #[test]
     fn delete_test() {
         let mut db = RDatabase::new();