diff --git a/internal/core/src/indexbuilder/VecIndexCreator.cpp b/internal/core/src/indexbuilder/VecIndexCreator.cpp
index 81bd8a7e4cf6776ce79cd7e57a0ea6903c8d64a7..96fee27b5439cb416f4b71f0a17e224a1d81d756 100644
--- a/internal/core/src/indexbuilder/VecIndexCreator.cpp
+++ b/internal/core/src/indexbuilder/VecIndexCreator.cpp
@@ -58,8 +58,8 @@ VecIndexCreator::parse_impl(const std::string& serialized_params_str, knowhere::
         conf[key] = value;
     }
 
-    auto stoi_closure = [](const std::string_view& s) -> int { return std::stoi(std::string(s)); };
-    auto stof_closure = [](const std::string_view& s) -> float { return std::stof(std::string(s)); };
+    auto stoi_closure = [](const std::string& s) -> int { return std::stoi(s); };
+    auto stof_closure = [](const std::string& s) -> float { return std::stof(s); };
 
     /***************************** meta *******************************/
     check_parameter<int>(conf, knowhere::meta::SLICE_SIZE, stoi_closure, std::optional{4});
@@ -124,16 +124,16 @@ VecIndexCreator::parse() {
 template <typename T>
 void
 VecIndexCreator::check_parameter(knowhere::Config& conf,
-                                 const std::string_view& key,
+                                 const std::string& key,
                                  std::function<T(std::string)> fn,
                                  std::optional<T> default_v) {
     if (!conf.contains(key)) {
         if (default_v.has_value()) {
-            conf[std::string(key)] = default_v.value();
+            conf[key] = default_v.value();
         }
     } else {
-        auto value = conf[std::string(key)];
-        conf[std::string(key)] = fn(value);
+        auto value = conf[key];
+        conf[key] = fn(value);
     }
 }
 
@@ -264,7 +264,7 @@ VecIndexCreator::get_index_type() {
     // knowhere bug here
     // the index_type of all ivf-based index will change to ivf flat after loaded
     auto type = get_config_by_name<std::string>("index_type");
-    return type.has_value() ? type.value() : std::string(knowhere::IndexEnum::INDEX_FAISS_IVFPQ);
+    return type.has_value() ? type.value() : knowhere::IndexEnum::INDEX_FAISS_IVFPQ;
 }
 
 std::string
@@ -275,9 +275,9 @@ VecIndexCreator::get_metric_type() {
     } else {
         auto index_type = get_index_type();
         if (is_in_bin_list(index_type)) {
-            return std::string(knowhere::metric::JACCARD);
+            return knowhere::metric::JACCARD;
         } else {
-            return std::string(knowhere::metric::L2);
+            return knowhere::metric::L2;
         }
     }
 }
diff --git a/internal/core/src/indexbuilder/VecIndexCreator.h b/internal/core/src/indexbuilder/VecIndexCreator.h
index 0eeb7ab1fda22769418cf74ef5e768435735e59b..d1a6ce50316f39a4df8322455b717e3ab8efe2d4 100644
--- a/internal/core/src/indexbuilder/VecIndexCreator.h
+++ b/internal/core/src/indexbuilder/VecIndexCreator.h
@@ -85,7 +85,7 @@ class VecIndexCreator : public IndexCreatorBase {
     template <typename T>
     void
     check_parameter(knowhere::Config& conf,
-                    const std::string_view& key,
+                    const std::string& key,
                     std::function<T(std::string)> fn,
                     std::optional<T> default_v = std::nullopt);
 
diff --git a/internal/core/src/query/Plan.h b/internal/core/src/query/Plan.h
index c29bf1c5c2a0e2c7455463934a5b5a7ff18a1c36..a8f623cbaa6af0662d005df352ca65b9a93e48e8 100644
--- a/internal/core/src/query/Plan.h
+++ b/internal/core/src/query/Plan.h
@@ -12,7 +12,6 @@
 #pragma once
 
 #include <memory>
-#include <string_view>
 #include <string>
 
 #include "PlanImpl.h"
diff --git a/internal/core/src/query/SearchBruteForce.cpp b/internal/core/src/query/SearchBruteForce.cpp
index cb53937c85ea457496e083ff5ca043616877331e..374d02594b43ef913a850cdddfcf6ac11bcdc98d 100644
--- a/internal/core/src/query/SearchBruteForce.cpp
+++ b/internal/core/src/query/SearchBruteForce.cpp
@@ -13,7 +13,9 @@
 #include <vector>
 
 #include "SearchBruteForce.h"
+#include "SubSearchResult.h"
 #include "knowhere/archive/BruteForce.h"
+#include "knowhere/index/vector_index/adapter/VectorAdapter.h"
 
 namespace milvus::query {
 
@@ -24,9 +26,24 @@ BruteForceSearch(const dataset::SearchDataset& dataset,
                  const BitsetView& bitset) {
     SubSearchResult sub_result(dataset.num_queries, dataset.topk, dataset.metric_type, dataset.round_decimal);
     try {
-        knowhere::BruteForceSearch(dataset.metric_type, chunk_data_raw, dataset.query_data, dataset.dim, chunk_rows,
-                                   dataset.num_queries, dataset.topk, sub_result.get_seg_offsets(),
-                                   sub_result.get_distances(), bitset);
+        auto nq = dataset.num_queries;
+        auto dim = dataset.dim;
+        auto topk = dataset.topk;
+
+        auto base_dataset = knowhere::GenDataset(chunk_rows, dim, chunk_data_raw);
+        auto query_dataset = knowhere::GenDataset(nq, dim, dataset.query_data);
+        auto config = knowhere::Config{
+            {knowhere::meta::METRIC_TYPE, dataset.metric_type},
+            {knowhere::meta::DIM, dim},
+            {knowhere::meta::TOPK, topk},
+        };
+        auto result = knowhere::BruteForce::Search(base_dataset, query_dataset, config, bitset);
+
+        sub_result.mutable_seg_offsets().resize(nq * topk);
+        sub_result.mutable_distances().resize(nq * topk);
+
+        std::copy_n(knowhere::GetDatasetIDs(result), nq * topk, sub_result.get_seg_offsets());
+        std::copy_n(knowhere::GetDatasetDistance(result), nq * topk, sub_result.get_distances());
     } catch (std::exception& e) {
         PanicInfo(e.what());
     }
diff --git a/internal/core/thirdparty/knowhere/CMakeLists.txt b/internal/core/thirdparty/knowhere/CMakeLists.txt
index 8f49df5ccc6c343f2e28918f45106450e6957324..d8b008f1b7dad5225d4fb7e79b5f2ba7904c585f 100644
--- a/internal/core/thirdparty/knowhere/CMakeLists.txt
+++ b/internal/core/thirdparty/knowhere/CMakeLists.txt
@@ -11,8 +11,8 @@
 # or implied. See the License for the specific language governing permissions and limitations under the License.
 #-------------------------------------------------------------------------------
 
-set( KNOWHERE_VERSION v1.1.14 )
-set( KNOWHERE_SOURCE_MD5 "de9303c3f667662aa92f3676a1f6ef96")
+set( KNOWHERE_VERSION v1.2.0 )
+set( KNOWHERE_SOURCE_MD5 "acc955a3b90c03f0afd0ff855e594777")
 
 if ( DEFINED ENV{MILVUS_KNOWHERE_URL} )
     set( KNOWHERE_SOURCE_URL "$ENV{MILVUS_KNOWHERE_URL}" )