From b14a0c4bf50f8212f05bac4f1aa5eb5fcabd585f Mon Sep 17 00:00:00 2001
From: cqy123456 <39671710+cqy123456@users.noreply.github.com>
Date: Thu, 12 Dec 2024 14:50:42 +0800
Subject: [PATCH] fix:GrowingDataGetter get the wrong string data (#38015)

issue: https://github.com/milvus-io/milvus/issues/37994
2.4 pr: https://github.com/milvus-io/milvus/pull/37995

Signed-off-by: cqy123456 <qianya.cheng@zilliz.com>
---
 .../core/src/exec/operator/groupby/SearchGroupByOperator.h  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/core/src/exec/operator/groupby/SearchGroupByOperator.h b/internal/core/src/exec/operator/groupby/SearchGroupByOperator.h
index 6de135fb9c..3a91bb1828 100644
--- a/internal/core/src/exec/operator/groupby/SearchGroupByOperator.h
+++ b/internal/core/src/exec/operator/groupby/SearchGroupByOperator.h
@@ -50,7 +50,11 @@ class GrowingDataGetter : public DataGetter<T> {
 
     T
     Get(int64_t idx) const {
-        return growing_raw_data_->operator[](idx);
+        if constexpr (std::is_same_v<std::string, T>) {
+            return T(growing_raw_data_->view_element(idx));
+        } else {
+            return growing_raw_data_->operator[](idx);
+        }
     }
 };