diff --git a/be/src/vec/aggregate_functions/aggregate_function_approx_top_k.h b/be/src/vec/aggregate_functions/aggregate_function_approx_top_k.h
index 6a9b1636fa0d94..2111c4dcd8f46c 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_approx_top_k.h
+++ b/be/src/vec/aggregate_functions/aggregate_function_approx_top_k.h
@@ -85,7 +85,7 @@ class AggregateFunctionApproxTopK final
     void deserialize(AggregateDataPtr __restrict place, BufferReadable& buf,
                      Arena* arena) const override {
         auto readStringBinaryInto = [](Arena& arena, BufferReadable& buf) {
-            size_t size = 0;
+            UInt64 size = 0;
             read_var_uint(size, buf);
 
             if (UNLIKELY(size > DEFAULT_MAX_STRING_SIZE)) {
@@ -101,7 +101,7 @@ class AggregateFunctionApproxTopK final
         auto& set = this->data(place).value;
         set.clear();
 
-        size_t size = 0;
+        UInt64 size = 0;
         read_var_uint(size, buf);
         if (UNLIKELY(size > TOP_K_MAX_SIZE)) {
             throw Exception(ErrorCode::INTERNAL_ERROR,
diff --git a/be/src/vec/aggregate_functions/aggregate_function_collect.h b/be/src/vec/aggregate_functions/aggregate_function_collect.h
index 02490be56a0bf1..f4c0bf4f2fed07 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_collect.h
+++ b/be/src/vec/aggregate_functions/aggregate_function_collect.h
@@ -98,7 +98,7 @@ struct AggregateFunctionCollectSetData {
     }
 
     void read(BufferReadable& buf) {
-        size_t new_size = 0;
+        UInt64 new_size = 0;
         read_var_uint(new_size, buf);
         ElementNativeType x;
         for (size_t i = 0; i < new_size; ++i) {
diff --git a/be/src/vec/aggregate_functions/aggregate_function_distinct.h b/be/src/vec/aggregate_functions/aggregate_function_distinct.h
index 3cce558312be24..4149fb08d706af 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_distinct.h
+++ b/be/src/vec/aggregate_functions/aggregate_function_distinct.h
@@ -94,7 +94,7 @@ struct AggregateFunctionDistinctSingleNumericData {
     void deserialize(BufferReadable& buf, Arena*) {
         DCHECK(!stable);
         if constexpr (!stable) {
-            size_t new_size = 0;
+            UInt64 new_size = 0;
             read_var_uint(new_size, buf);
             T x;
             for (size_t i = 0; i < new_size; ++i) {
diff --git a/be/src/vec/common/space_saving.h b/be/src/vec/common/space_saving.h
index 18fa216228ddfb..06e1bdcbc2bf79 100644
--- a/be/src/vec/common/space_saving.h
+++ b/be/src/vec/common/space_saving.h
@@ -244,7 +244,7 @@ class SpaceSaving {
 
     void read(BufferReadable& rb) {
         destroy_elements();
-        size_t count = 0;
+        UInt64 count = 0;
         read_var_uint(count, rb);
 
         for (size_t i = 0; i < count; ++i) {
@@ -259,7 +259,7 @@ class SpaceSaving {
 
     // Reads the alpha map data from the provided readable buffer.
     void read_alpha_map(BufferReadable& rb) {
-        size_t alpha_size = 0;
+        UInt64 alpha_size = 0;
         read_var_uint(alpha_size, rb);
         for (size_t i = 0; i < alpha_size; ++i) {
             uint64_t alpha = 0;
diff --git a/be/src/vec/exprs/table_function/vexplode_numbers.cpp b/be/src/vec/exprs/table_function/vexplode_numbers.cpp
index 0c4c330f73c787..b838563cc9f207 100644
--- a/be/src/vec/exprs/table_function/vexplode_numbers.cpp
+++ b/be/src/vec/exprs/table_function/vexplode_numbers.cpp
@@ -70,7 +70,7 @@ Status VExplodeNumbersTableFunction::process_init(Block* block, RuntimeState* st
 
         ((ColumnInt32*)_elements_column.get())->clear();
         //_cur_size may be a negative number
-        _cur_size = std::max(0L, _cur_size);
+        _cur_size = std::max(static_cast<int64_t>(0), _cur_size);
         if (_cur_size &&
             _cur_size <= state->batch_size()) { // avoid elements_column too big or empty
             _is_const = true;                   // use const optimize
diff --git a/be/src/vec/exprs/vruntimefilter_wrapper.h b/be/src/vec/exprs/vruntimefilter_wrapper.h
index 79e9361e854719..4c7ea8b162dc76 100644
--- a/be/src/vec/exprs/vruntimefilter_wrapper.h
+++ b/be/src/vec/exprs/vruntimefilter_wrapper.h
@@ -77,7 +77,9 @@ class VRuntimeFilterWrapper final : public VExpr {
     template <typename T>
     static void judge_selectivity(double ignore_threshold, int64_t filter_rows, int64_t input_rows,
                                   T& always_true) {
-        always_true = filter_rows / (input_rows * 1.0L) < ignore_threshold;
+        always_true = static_cast<long double>(filter_rows) /
+                              (static_cast<long double>(input_rows) * 1.0L) <
+                      ignore_threshold;
     }
 
     bool is_rf_wrapper() const override { return true; }