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 44ebf03c1c..41ed172b88 100644
--- a/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp
+++ b/src/storage/blocksstable/index_block/ob_index_block_aggregator.cpp
@@ -1034,7 +1034,12 @@ int ObSkipIndexDataAggregator::eval(const ObIMicroBlockWriter &data_micro_writer
           }
         } else if (can_agg_with_dict(static_cast<ObSkipIndexColType>(idx_col_meta.col_type_))) {
           // try aggregate with dict
-          if (pre_agg_param.use_cs_encoding_ht()) {
+          if (pre_agg_param.is_all_null_column()) {
+            tmp_result.set_null();
+            if (OB_FAIL(col_aggs_.at(i)->eval(tmp_result, false))) {
+              LOG_WARN("failed to evaluate all null column", K(ret), K(pre_agg_param));
+            }
+          } else if (pre_agg_param.use_cs_encoding_ht()) {
             if (OB_FAIL(do_col_agg(i, *pre_agg_param.cs_encoding_ht_))) {
               LOG_WARN("failed to do column aggregation with cs encoding hashtable", K(ret));
             }
@@ -1091,6 +1096,8 @@ int ObSkipIndexDataAggregator::do_col_agg_with_pre_agg_integer(
   }
 
   if (OB_FAIL(ret)) {
+  } else if (agg_param.is_all_null_column()) {
+    tmp_result.set_null();
   } else if (type_class == ObIntTC) {
     switch (datum_type) {
       case OBJ_DATUM_8BYTE_DATA: {
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 c6df636ad0..ebe30cac30 100644
--- a/src/storage/blocksstable/index_block/ob_index_block_aggregator.h
+++ b/src/storage/blocksstable/index_block/ob_index_block_aggregator.h
@@ -146,6 +146,7 @@ struct ObMicroDataPreAggParam
   void reset() { memset(this, 0, sizeof(*this)); }
   bool use_encoding_ht() const { return is_pax_encoding_ && nullptr != encoding_ht_; }
   bool use_cs_encoding_ht() const { return is_cs_encoding_ && nullptr != cs_encoding_ht_; }
+  bool is_all_null_column() const { OB_ASSERT(nullptr != col_datums_); return null_cnt_ == col_datums_->count(); }
   TO_STRING_KV(KP_(col_datums), KP_(encoding_ht), K_(null_cnt), K_(min_integer), K_(max_integer),
       K_(is_integer_aggregated), K_(is_cs_encoding), K_(is_pax_encoding));