diff --git a/src/Processors/Formats/Impl/CSVRowInputFormat.cpp b/src/Processors/Formats/Impl/CSVRowInputFormat.cpp
index 9092c7fceba..52f9571f962 100644
--- a/src/Processors/Formats/Impl/CSVRowInputFormat.cpp
+++ b/src/Processors/Formats/Impl/CSVRowInputFormat.cpp
@@ -417,7 +417,7 @@ std::optional<std::pair<std::vector<String>, DataTypes>> CSVSchemaReader::readRo
 
     auto fields = reader.readRow();
     auto data_types = tryInferDataTypesByEscapingRule(fields, format_settings, FormatSettings::EscapingRule::CSV);
-    return std::make_pair(fields, data_types);
+    return std::make_pair(std::move(fields), std::move(data_types));
 }
 
 std::optional<DataTypes> CSVSchemaReader::readRowAndGetDataTypesImpl()
diff --git a/src/Processors/Formats/Impl/CustomSeparatedRowInputFormat.cpp b/src/Processors/Formats/Impl/CustomSeparatedRowInputFormat.cpp
index ff3d6d49199..17cc88425f5 100644
--- a/src/Processors/Formats/Impl/CustomSeparatedRowInputFormat.cpp
+++ b/src/Processors/Formats/Impl/CustomSeparatedRowInputFormat.cpp
@@ -388,7 +388,7 @@ std::optional<std::pair<std::vector<String>, DataTypes>> CustomSeparatedSchemaRe
 
     auto fields = reader.readRow();
     auto data_types = tryInferDataTypesByEscapingRule(fields, reader.getFormatSettings(), reader.getEscapingRule(), &json_inference_info);
-    return std::make_pair(fields, data_types);
+    return std::make_pair(std::move(fields), std::move(data_types));
 }
 
 std::optional<DataTypes> CustomSeparatedSchemaReader::readRowAndGetDataTypesImpl()
diff --git a/src/Processors/Formats/RowInputFormatWithNamesAndTypes.cpp b/src/Processors/Formats/RowInputFormatWithNamesAndTypes.cpp
index 4000bd14ddc..fc2b5cd8207 100644
--- a/src/Processors/Formats/RowInputFormatWithNamesAndTypes.cpp
+++ b/src/Processors/Formats/RowInputFormatWithNamesAndTypes.cpp
@@ -425,7 +425,7 @@ void FormatWithNamesAndTypesSchemaReader::tryDetectHeader(std::vector<String> &
     if (!first_row)
         return;
 
-    auto [first_row_values, first_row_types] = *first_row;
+    const auto & [first_row_values, first_row_types] = *first_row;
 
     /// The first row contains non String elements, it cannot be a header.
     if (!checkIfAllTypesAreString(first_row_types))
@@ -443,7 +443,7 @@ void FormatWithNamesAndTypesSchemaReader::tryDetectHeader(std::vector<String> &
         return;
     }
 
-    auto [second_row_values, second_row_types] = *second_row;
+    const auto & [second_row_values, second_row_types] = *second_row;
 
     DataTypes data_types;
     bool second_row_can_be_type_names = checkIfAllTypesAreString(second_row_types) && checkIfAllValuesAreTypeNames(readNamesFromFields(second_row_values));