From 5f587af078eb6f9c962ee1ba0dccfefcab400f3a Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nk@clickhouse.com>
Date: Mon, 26 Aug 2024 15:15:16 +0000
Subject: [PATCH] Review fix.

---
 src/Processors/Transforms/MergingAggregatedTransform.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Processors/Transforms/MergingAggregatedTransform.cpp b/src/Processors/Transforms/MergingAggregatedTransform.cpp
index 9b107b70075..78fb2f340bf 100644
--- a/src/Processors/Transforms/MergingAggregatedTransform.cpp
+++ b/src/Processors/Transforms/MergingAggregatedTransform.cpp
@@ -74,7 +74,9 @@ void MergingAggregatedTransform::addBlock(Block block)
         /// Fill the last equal range.
         selector.resize_fill(row, enumerated_groups[last_group]);
         /// Enumerate new group if did not see it before.
-        enumerated_groups.emplace(last_group, enumerated_groups.size());
+        enumerated_groups.emplace(group, enumerated_groups.size());
+
+        last_group = group;
     }
 
     /// Optimization for single group.