diff --git a/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp b/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp
index 03ca468b29..f7a97a440b 100644
--- a/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp
+++ b/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp
@@ -21,6 +21,35 @@ using namespace common;
 namespace blocksstable
 {
 
+int ObIColAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
+{
+  int ret = OB_SUCCESS;
+  if (OB_NOT_NULL(result_)) {
+    ret = OB_INIT_TWICE;
+    LOG_WARN("Init twice", K(ret));
+  } else {
+    col_desc_ = col_desc;
+    result_ = &result;
+    result_->set_null();
+    if (is_skip_index_black_list_type(col_desc.col_type_.get_type())) {
+      set_not_aggregate();
+    }
+  }
+  return ret;
+}
+
+void ObIColAggregator::reuse()
+{
+  if (nullptr != result_) {
+    result_->set_null();
+  }
+  if (is_skip_index_black_list_type(col_desc_.col_type_.get_type())) {
+    set_not_aggregate();
+  } else {
+    can_aggregate_ = true;
+  }
+}
+
 int ObIColAggregator::copy_agg_datum(const ObDatum &src, ObDatum &dst)
 {
   int ret = OB_SUCCESS;
@@ -40,28 +69,18 @@ int ObIColAggregator::copy_agg_datum(const ObDatum &src, ObDatum &dst)
 int ObColNullCountAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
 {
   int ret = OB_SUCCESS;
-  if (OB_NOT_NULL(result_)) {
-    ret = OB_INIT_TWICE;
-    LOG_WARN("Init twice", K(ret));
+  if (OB_FAIL(ObIColAggregator::init(col_desc, result))) {
+    LOG_WARN("fail to init ObIColAggregator", K(ret));
   } else {
     null_count_ = 0;
-    result_ = &result;
-    if (is_skip_index_black_list_type(col_desc.col_type_.get_type())) {
-      set_not_aggregate();
-    }
-    col_desc_ = col_desc;
   }
   return ret;
 }
 
 void ObColNullCountAggregator::reuse()
 {
+  ObIColAggregator::reuse();
   null_count_ = 0;
-  if (is_skip_index_black_list_type(col_desc_.col_type_.get_type())) {
-    set_not_aggregate();
-  } else {
-    can_aggregate_ = true;
-  }
 }
 
 int ObColNullCountAggregator::eval(const ObStorageDatum &datum, const bool is_data)
@@ -103,19 +122,12 @@ int ObColNullCountAggregator::get_result(const ObStorageDatum *&result)
 int ObColMaxAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
 {
   int ret = OB_SUCCESS;
-  if (OB_NOT_NULL(result_)) {
-    ret = OB_INIT_TWICE;
-    LOG_WARN("Init twice", K(ret));
+  if (OB_FAIL(ObIColAggregator::init(col_desc, result))) {
+    LOG_WARN("fail to init ObIColAggregator", K(ret));
   } else {
     sql::ObExprBasicFuncs *basic_funcs = ObDatumFuncs::get_basic_func(
         col_desc.col_type_.get_type(), col_desc.col_type_.get_collation_type());
     cmp_func_ = basic_funcs->null_first_cmp_;
-    result_ = &result;
-    result_->set_null();
-    if (is_skip_index_black_list_type(col_desc.col_type_.get_type())) {
-      set_not_aggregate();
-    }
-    col_desc_ = col_desc;
     LOG_DEBUG("[SKIP INDEX] init max aggregator", K(col_desc_), K(can_aggregate_));
   }
   return ret;
@@ -123,14 +135,7 @@ int ObColMaxAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
 
 void ObColMaxAggregator::reuse()
 {
-  if (nullptr != result_) {
-    result_->set_null();
-  }
-  if (is_skip_index_black_list_type(col_desc_.col_type_.get_type())) {
-    set_not_aggregate();
-  } else {
-    can_aggregate_ = true;
-  }
+  ObIColAggregator::reuse();
 }
 
 int ObColMaxAggregator::eval(const ObStorageDatum &datum, const bool is_data)
@@ -174,19 +179,12 @@ int ObColMaxAggregator::get_result(const ObStorageDatum *&result)
 int ObColMinAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
 {
   int ret = OB_SUCCESS;
-  if (OB_NOT_NULL(result_)) {
-    ret = OB_INIT_TWICE;
-    LOG_WARN("Init twice", K(ret));
+  if (OB_FAIL(ObIColAggregator::init(col_desc, result))) {
+    LOG_WARN("fail to init ObIColAggregator", K(ret));
   } else {
     sql::ObExprBasicFuncs *basic_funcs = ObDatumFuncs::get_basic_func(
         col_desc.col_type_.get_type(), col_desc.col_type_.get_collation_type());
     cmp_func_ = basic_funcs->null_last_cmp_;
-    result_ = &result;
-    result_->set_null();
-    if (is_skip_index_black_list_type(col_desc.col_type_.get_type())) {
-      set_not_aggregate();
-    }
-    col_desc_ = col_desc;
     LOG_DEBUG("[SKIP INDEX] init min aggregator", K(col_desc_), K(can_aggregate_));
   }
   return ret;
@@ -194,14 +192,7 @@ int ObColMinAggregator::init(const ObColDesc &col_desc, ObStorageDatum &result)
 
 void ObColMinAggregator::reuse()
 {
-  if (nullptr != result_) {
-    result_->set_null();
-  }
-  if (is_skip_index_black_list_type(col_desc_.col_type_.get_type())) {
-    set_not_aggregate();
-  } else {
-    can_aggregate_ = true;
-  }
+  ObIColAggregator::reuse();
 }
 
 int ObColMinAggregator::eval(const ObStorageDatum &datum, const bool is_data)
@@ -352,10 +343,11 @@ int ObSkipIndexAggregator::eval(const ObDatumRow &datum_row)
   return ret;
 }
 
-int ObSkipIndexAggregator::eval(const char *buf, const int64_t buf_size)
+int ObSkipIndexAggregator::eval(const char *buf, const int64_t buf_size, const int64_t row_count)
 {
   int ret = OB_SUCCESS;
   ObStorageDatum tmp_datum;
+  ObStorageDatum tmp_null_datum;
   if (IS_NOT_INIT) {
     ret = OB_NOT_INIT;
     LOG_WARN("Not init", K(ret));
@@ -368,13 +360,32 @@ int ObSkipIndexAggregator::eval(const char *buf, const int64_t buf_size)
     evaluated_ = true;
     for (int64_t i = 0; OB_SUCC(ret) && i < full_agg_metas_->count(); ++i) {
       tmp_datum.reuse();
+      tmp_null_datum.reuse();
       const ObSkipIndexColMeta &idx_col_meta = full_agg_metas_->at(i);
       if (OB_FAIL(agg_row_reader_.read(idx_col_meta, tmp_datum))) {
-        LOG_WARN("Fail to read aggregated data", K(ret));
+        LOG_WARN("Fail to read aggregated data", K(ret), K(idx_col_meta));
       } else if (OB_UNLIKELY(tmp_datum.is_ext())) {
         ret = OB_ERR_UNEXPECTED;
-        LOG_WARN("Unexpected ext agg datum", K(ret), K(tmp_datum));
-      } else if (OB_FAIL(col_aggs_.at(i)->eval(tmp_datum, false))) {
+        LOG_WARN("Unexpected ext agg datum", K(ret), K(tmp_datum), K(idx_col_meta));
+      } else if (tmp_datum.is_null()) {
+        ObSkipIndexColMeta null_col_meta(idx_col_meta.col_idx_, SK_IDX_NULL_COUNT);
+        if (OB_FAIL(agg_row_reader_.read(null_col_meta, tmp_null_datum))) {
+          LOG_WARN("Fail to read aggregated null", K(ret), K(idx_col_meta));
+        } else if (tmp_null_datum.is_ext()) {
+          ret = OB_ERR_UNEXPECTED;
+          LOG_WARN("Unexpected null count datum", K(ret), K(tmp_null_datum), K(idx_col_meta));
+        } else if (tmp_null_datum.is_null()) {
+          col_aggs_.at(i)->set_not_aggregate();
+        } else if (tmp_null_datum.get_int() > row_count) {
+          ret = OB_ERR_UNEXPECTED;
+          LOG_ERROR("Unexpected null count datum out row count", K(ret),
+              K(tmp_null_datum), K(row_count), K(null_col_meta));
+        } else if (tmp_null_datum.get_int() < row_count) {
+          col_aggs_.at(i)->set_not_aggregate();
+        }
+      }
+
+      if (FAILEDx(col_aggs_.at(i)->eval(tmp_datum, false))) {
         col_aggs_.at(i)->set_not_aggregate();
         LOG_ERROR("Fail to eval aggregate column", K(ret), K(tmp_datum), K_(is_data),
             K(idx_col_meta), K(i), K(col_aggs_.at(i)->get_col_decs()));
@@ -659,7 +670,7 @@ int ObIndexBlockAggregator::eval(const ObIndexBlockRowDesc &row_desc)
         ret = OB_INVALID_ARGUMENT;
         LOG_WARN("Invalid aggregated row header", K(ret), KPC(agg_row_header));
       } else if (OB_FAIL(skip_index_aggregator_.eval(
-          row_desc.serialized_agg_row_buf_, agg_row_header->length_))) {
+          row_desc.serialized_agg_row_buf_, agg_row_header->length_, row_desc.row_count_))) {
         LOG_WARN("Fail to aggregate serialized index row", K(ret), K(row_desc), KPC(agg_row_header));
       }
     } else if (OB_FAIL(skip_index_aggregator_.eval(*row_desc.aggregated_row_))) {
diff --git a/src/storage/blocksstable/index_block/ob_index_block_aggregator.h b/src/storage/blocksstable/index_block/ob_index_block_aggregator.h
index 3746d99b41..baa2f19ffe 100644
--- a/src/storage/blocksstable/index_block/ob_index_block_aggregator.h
+++ b/src/storage/blocksstable/index_block/ob_index_block_aggregator.h
@@ -24,12 +24,12 @@ namespace blocksstable
 class ObIColAggregator
 {
 public:
-  ObIColAggregator() : col_desc_(), can_aggregate_(true) {}
+  ObIColAggregator() : col_desc_(), result_(nullptr), can_aggregate_(true) {}
   virtual ~ObIColAggregator() {}
 
   virtual int init(const ObColDesc &col_desc, ObStorageDatum &result) = 0;
   virtual void reset() = 0;
-  virtual void reuse() = 0;
+  virtual void reuse();
   virtual int eval(const ObStorageDatum &datum, const bool is_data) = 0;
   virtual int get_result(const ObStorageDatum *&result) = 0;
   VIRTUAL_TO_STRING_KV(K_(can_aggregate));
@@ -47,13 +47,14 @@ protected:
   }
 protected:
   ObColDesc col_desc_;
+  ObStorageDatum *result_;
   bool can_aggregate_;
 };
 
 class ObColNullCountAggregator : public ObIColAggregator
 {
 public:
-  ObColNullCountAggregator() : null_count_(0), result_(nullptr) {}
+  ObColNullCountAggregator() : null_count_(0) {}
   virtual ~ObColNullCountAggregator() {}
 
   int init(const ObColDesc &col_desc, ObStorageDatum &result) override;
@@ -63,14 +64,13 @@ public:
   int get_result(const ObStorageDatum *&result) override;
 private:
   int64_t null_count_;
-  ObStorageDatum *result_;
   DISALLOW_COPY_AND_ASSIGN(ObColNullCountAggregator);
 };
 
 class ObColMaxAggregator : public ObIColAggregator
 {
 public:
-  ObColMaxAggregator() : cmp_func_(nullptr), result_(nullptr) {}
+  ObColMaxAggregator() : cmp_func_(nullptr) {}
   virtual ~ObColMaxAggregator() {}
 
   int init(const ObColDesc &col_desc, ObStorageDatum &result) override;
@@ -80,14 +80,13 @@ public:
   int get_result(const ObStorageDatum *&result) override;
 private:
   common::ObDatumCmpFuncType cmp_func_;
-  ObStorageDatum *result_;
   DISALLOW_COPY_AND_ASSIGN(ObColMaxAggregator);
 };
 
 class ObColMinAggregator : public ObIColAggregator
 {
 public:
-  ObColMinAggregator() : cmp_func_(nullptr), result_(nullptr) {}
+  ObColMinAggregator() : cmp_func_(nullptr) {}
   virtual ~ObColMinAggregator() {}
 
   int init(const ObColDesc &col_desc, ObStorageDatum &result) override;
@@ -97,7 +96,6 @@ public:
   int get_result(const ObStorageDatum *&result) override;
 private:
   common::ObDatumCmpFuncType cmp_func_;
-  ObStorageDatum *result_;
   DISALLOW_COPY_AND_ASSIGN(ObColMinAggregator);
 };
 
@@ -120,7 +118,7 @@ public:
   // Aggregate with datum row
   int eval(const ObDatumRow &datum_row);
   // Aggregate with serialized agg row
-  int eval(const char *buf, const int64_t buf_size);
+  int eval(const char *buf, const int64_t buf_size, const int64_t row_count);
   // Generate aggregated row for serialization
   int get_aggregated_row(const ObDatumRow *&aggregated_row);
   int64_t get_max_agg_size() { return max_agg_size_; }
diff --git a/src/storage/blocksstable/ob_macro_block_writer.cpp b/src/storage/blocksstable/ob_macro_block_writer.cpp
index 5709cc26e6..06b9826375 100644
--- a/src/storage/blocksstable/ob_macro_block_writer.cpp
+++ b/src/storage/blocksstable/ob_macro_block_writer.cpp
@@ -1869,7 +1869,8 @@ int ObMacroBlockWriter::agg_micro_block(const ObMicroIndexInfo &micro_index_info
 {
   int ret = OB_SUCCESS;
   if (micro_index_info.is_pre_aggregated() && nullptr != data_aggregator_) {
-    if (OB_FAIL(data_aggregator_->eval(micro_index_info.agg_row_buf_, micro_index_info.agg_buf_size_))) {
+    if (OB_FAIL(data_aggregator_->eval(micro_index_info.agg_row_buf_,
+        micro_index_info.agg_buf_size_, micro_index_info.get_row_count()))) {
       LOG_WARN("Fail to evaluate by micro block", K(ret), K(micro_index_info));
     }
   }
diff --git a/unittest/storage/blocksstable/test_index_block_aggregator.cpp b/unittest/storage/blocksstable/test_index_block_aggregator.cpp
index 386b3b9c41..1a6cdf887d 100644
--- a/unittest/storage/blocksstable/test_index_block_aggregator.cpp
+++ b/unittest/storage/blocksstable/test_index_block_aggregator.cpp
@@ -41,9 +41,9 @@ public:
   void generate_row_by_seed(const int64_t seed, ObDatumRow &datum_row);
   void reset_min_max_row();
   void update_min_max_row(const ObDatumRow &row);
-  void validate_agg_row(const ObDatumRow &row, int64_t nop_col_cnt = 0, int64_t *nop_col_idxs = nullptr);
-  void set_nop_cols(ObDatumRow &row, int64_t nop_col_cnt = 0, int64_t *nop_col_idxs = nullptr);
-  bool is_col_in_nop_col_arr(const int64_t col_idx, const int64_t nop_col_cnt, int64_t *nop_col_idxs);
+  void validate_agg_row(const ObDatumRow &row, int64_t nop_col_cnt = 0, int64_t *nop_col_idxs = nullptr, ObSkipIndexColType *nop_col_types = nullptr);
+  void set_nop_cols(ObDatumRow &row, int64_t nop_col_cnt = 0, int64_t *nop_col_idxs = nullptr, ObSkipIndexColType *nop_col_types = nullptr);
+  bool is_col_in_nop_col_arr(const int64_t col_idx, const int64_t nop_col_cnt, int64_t *nop_col_idxs, int64_t &index);
   void serialize_agg_row(const ObDatumRow &agg_row, const char *&row_buf, int64_t &row_size);
   void get_cmp_func(const ObColDesc &col_desc, ObStorageDatumCmpFunc &cmp_func);
 
@@ -182,13 +182,14 @@ void TestIndexBlockAggregator::update_min_max_row(const ObDatumRow &row)
 }
 
 void TestIndexBlockAggregator::validate_agg_row(
-    const ObDatumRow &datum_row, int64_t nop_col_cnt, int64_t *nop_col_idxs)
+    const ObDatumRow &datum_row, int64_t nop_col_cnt, int64_t *nop_col_idxs, ObSkipIndexColType *nop_col_types)
 {
   for (int64_t i = 0; i < full_agg_metas_.count(); ++i) {
     ObSkipIndexColMeta idx_meta = full_agg_metas_.at(i);
     const int64_t col_idx = idx_meta.col_idx_;
-    bool is_nop_column = is_col_in_nop_col_arr(col_idx, nop_col_cnt, nop_col_idxs);
-    if (is_nop_column) {
+    int64_t index = 0;
+    bool is_nop_column = is_col_in_nop_col_arr(col_idx, nop_col_cnt, nop_col_idxs, index);
+    if (is_nop_column && ((nop_col_types == nullptr ) || (nop_col_types != nullptr && nop_col_types[index] == idx_meta.col_type_))) {
       ASSERT_TRUE(datum_row.storage_datums_[i].is_nop());
     } else if (datum_row.storage_datums_[i].is_nop() || datum_row.storage_datums_[i].is_null()) { // skip for not aggregate data
       ASSERT_TRUE(min_row_.storage_datums_[col_idx].is_null());
@@ -223,25 +224,33 @@ void TestIndexBlockAggregator::validate_agg_row(
 }
 
 void TestIndexBlockAggregator::set_nop_cols(
-    ObDatumRow &row, int64_t nop_col_cnt, int64_t *nop_col_idxs)
+    ObDatumRow &row, int64_t nop_col_cnt, int64_t *nop_col_idxs, ObSkipIndexColType *nop_col_types)
 {
   for (int64_t i = 0; i < full_agg_metas_.count(); ++i) {
     ASSERT_TRUE(i < row.get_column_count());
     ObSkipIndexColMeta idx_meta = full_agg_metas_.at(i);
     const int64_t col_idx = idx_meta.col_idx_;
-    if (is_col_in_nop_col_arr(col_idx, nop_col_cnt, nop_col_idxs)) {
-      row.storage_datums_[i].set_nop();
+    int64_t index = 0;
+    if (is_col_in_nop_col_arr(col_idx, nop_col_cnt, nop_col_idxs, index)) {
+      if (nop_col_types != nullptr) {
+        if (nop_col_types[index] == idx_meta.col_type_) {
+          row.storage_datums_[i].set_nop();
+        }
+      } else {
+        row.storage_datums_[i].set_nop();
+      }
     }
   }
 }
 
 bool TestIndexBlockAggregator::is_col_in_nop_col_arr(
-    const int64_t col_idx, const int64_t nop_col_cnt, int64_t *nop_col_idxs)
+    const int64_t col_idx, const int64_t nop_col_cnt, int64_t *nop_col_idxs, int64_t &index)
 {
   bool is_nop_column = false;
   for (int64_t i = 0; i < nop_col_cnt; ++i) {
     if (col_idx == nop_col_idxs[i]) {
       is_nop_column = true;
+      index = i;
       break;
     }
   }
@@ -310,14 +319,14 @@ TEST_F(TestIndexBlockAggregator, basic_aggregate)
       ASSERT_EQ(OB_SUCCESS, data_aggregator.eval(generate_row));
       ASSERT_EQ(OB_SUCCESS, data_aggregator.get_aggregated_row(data_agg_row));
       ASSERT_TRUE(nullptr != data_agg_row);
-      if (0 == test_row_cnt / 2) {
+      if (0 == i / 2) {
         ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(*data_agg_row));
       } else {
         const char *row_buf = nullptr;
         int64_t row_size = 0;
         serialize_agg_row(*data_agg_row, row_buf, row_size);
         ASSERT_TRUE(nullptr != row_buf);
-        ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(row_buf, row_size));
+        ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(row_buf, row_size, i));
       }
       ASSERT_EQ(OB_SUCCESS, index_aggregator.get_aggregated_row(index_agg_row));
       ASSERT_TRUE(nullptr != index_agg_row);
@@ -348,7 +357,15 @@ TEST_F(TestIndexBlockAggregator, basic_aggregate)
     ASSERT_EQ(OB_SUCCESS, data_aggregator.get_aggregated_row(data_agg_row));
     ASSERT_TRUE(nullptr != data_agg_row);
     set_nop_cols(*const_cast<ObDatumRow *>(data_agg_row), nop_col_cnt, nop_col_idxs);
-    ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(*data_agg_row));
+    if (0 == i / 2) {
+      ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(*data_agg_row));
+    } else {
+      const char *row_buf = nullptr;
+      int64_t row_size = 0;
+      serialize_agg_row(*data_agg_row, row_buf, row_size);
+      ASSERT_TRUE(nullptr != row_buf);
+      ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(row_buf, row_size, i));
+    }
     ASSERT_EQ(OB_SUCCESS, index_aggregator.get_aggregated_row(index_agg_row));
     ASSERT_TRUE(nullptr != index_agg_row);
     update_min_max_row(generate_row);
@@ -356,6 +373,39 @@ TEST_F(TestIndexBlockAggregator, basic_aggregate)
     validate_agg_row(*index_agg_row, nop_col_cnt, nop_col_idxs);
   }
 
+  // test null index row
+  ObSkipIndexColType nop_col_types[3] = {SK_IDX_MAX, SK_IDX_MIN, SK_IDX_NULL_COUNT};
+  reset_min_max_row();
+  data_agg_result.reuse();
+  index_agg_result.reuse();
+  data_aggregator.reuse();
+  index_aggregator.reuse();
+  data_agg_row = nullptr;
+  index_agg_row = nullptr;
+  for (int64_t i = 0; i < test_row_cnt; ++i) {
+    const int64_t seed = random() % test_row_cnt;
+    generate_row_by_seed(seed, generate_row);
+    ASSERT_EQ(OB_SUCCESS, data_aggregator.eval(generate_row));
+    ASSERT_EQ(OB_SUCCESS, data_aggregator.get_aggregated_row(data_agg_row));
+    ASSERT_TRUE(nullptr != data_agg_row);
+    set_nop_cols(*const_cast<ObDatumRow *>(data_agg_row), nop_col_cnt, nop_col_idxs, nop_col_types);
+    if (0 == i / 2) {
+      ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(*data_agg_row));
+    } else {
+      const char *row_buf = nullptr;
+      int64_t row_size = 0;
+      serialize_agg_row(*data_agg_row, row_buf, row_size);
+      ASSERT_TRUE(nullptr != row_buf);
+      ASSERT_EQ(OB_SUCCESS, index_aggregator.eval(row_buf, row_size, i));
+    }
+    ASSERT_EQ(OB_SUCCESS, index_aggregator.get_aggregated_row(index_agg_row));
+    ASSERT_TRUE(nullptr != index_agg_row);
+    update_min_max_row(generate_row);
+    validate_agg_row(*data_agg_row, nop_col_cnt, nop_col_idxs, nop_col_types);
+    validate_agg_row(*index_agg_row, nop_col_cnt, nop_col_idxs, nop_col_types);
+  }
+
+
   // test reuse
   reset_min_max_row();
   data_agg_result.reuse();