From 906fb8ef871fef4bfdb4e5be6bfb9a5fad4d0d8b Mon Sep 17 00:00:00 2001
From: Pascal Seitz <pascal.seitz@gmail.com>
Date: Mon, 7 Sep 2026 18:19:11 +0800
Subject: [PATCH] update comment

---
 src/aggregation/bucket/term_agg/mod.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/aggregation/bucket/term_agg/mod.rs b/src/aggregation/bucket/term_agg/mod.rs
index 2805d8f77..08ec2f093 100644
--- a/src/aggregation/bucket/term_agg/mod.rs
+++ b/src/aggregation/bucket/term_agg/mod.rs
@@ -1465,7 +1465,9 @@ where
                 out.push((IntermediateKey::IpAddr(val), intermediate_entry));
             }
         } else if term_req.column_type == ColumnType::F64 {
-            // Distinct f64 encodings can normalize to the same public key, notably -0.0 and +0.0.
+            // -0.0 and +0.0 both normalize to I64(0). Sort by normalized key to merge their
+            // buckets below. Other distinct f64 encodings, including NaNs, remain distinct:
+            // NaNs are not normalized and IntermediateKey compares them using total_cmp.
             let normalized_key = |val: u64| -> IntermediateKey {
                 NumericalValue::from(f64::from_u64(val)).normalize().into()
             };