diff --git a/src/storage/blocksstable/encoding/ob_column_equal_encoder.cpp b/src/storage/blocksstable/encoding/ob_column_equal_encoder.cpp
index 7144cfa4c..3354a8d6d 100644
--- a/src/storage/blocksstable/encoding/ob_column_equal_encoder.cpp
+++ b/src/storage/blocksstable/encoding/ob_column_equal_encoder.cpp
@@ -107,12 +107,6 @@ int ObColumnEqualEncoder::traverse(bool &suitable)
       precision = column_type_.get_stored_precision();
       OB_ASSERT(precision != PRECISION_UNKNOWN_YET);
     }
-    sql::ObExprBasicFuncs *basic_funcs = ObDatumFuncs::get_basic_func(
-        column_type_.get_type(), column_type_.get_collation_type(), column_type_.get_scale(),
-        lib::is_oracle_mode(), has_lob_header, precision);
-    ObCmpFunc cmp_func;
-    cmp_func.cmp_func_ = lib::is_oracle_mode()
-        ? basic_funcs->null_last_cmp_ : basic_funcs->null_first_cmp_;
 
     // get all exception row_ids
     for (int64_t row_id = 0; row_id < rows_->count() && OB_SUCC(ret)
@@ -120,7 +114,7 @@ int ObColumnEqualEncoder::traverse(bool &suitable)
       const ObDatum &datum = ctx_->col_datums_->at(row_id);
       const ObDatum &ref_datum = ref_ctx_->col_datums_->at(row_id);
       bool equal = false;
-      if (OB_FAIL(is_datum_equal(datum, ref_datum, cmp_func, equal))) {
+      if (OB_FAIL(is_datum_equal(datum, ref_datum, equal))) {
         LOG_WARN("cmp datum failed", K(ret), K(row_id));
       } else if (!equal && OB_FAIL(exc_row_ids_.push_back(row_id))) {
         LOG_WARN("push_back failed", K(ret), K(row_id));
diff --git a/src/storage/blocksstable/encoding/ob_column_equal_encoder.h b/src/storage/blocksstable/encoding/ob_column_equal_encoder.h
index ab3085296..65cc92797 100644
--- a/src/storage/blocksstable/encoding/ob_column_equal_encoder.h
+++ b/src/storage/blocksstable/encoding/ob_column_equal_encoder.h
@@ -77,7 +77,6 @@ private:
   OB_INLINE int is_datum_equal(
       const common::ObDatum &left,
       const common::ObDatum &right,
-      const common::ObCmpFunc &cmp_func,
       bool &equal) const;
 
   int64_t ref_col_idx_;
@@ -91,14 +90,11 @@ private:
 OB_INLINE int ObColumnEqualEncoder::is_datum_equal(
       const common::ObDatum &left,
       const common::ObDatum &right,
-      const common::ObCmpFunc &cmp_func,
       bool &equal) const
 {
   int ret = OB_SUCCESS;
   equal = false;
   const bool is_int_type = ObIntSC == store_class_ || ObUIntSC == store_class_;
-  const bool need_binary_equal =
-      store_class_ != ObNumberSC && store_class_ != ObOTimestampSC && store_class_ != ObIntervalSC;
   ObStoredExtValue left_ext = get_stored_ext_value(left);
   ObStoredExtValue right_ext = get_stored_ext_value(right);
   if (left_ext != right_ext) {
@@ -107,12 +103,8 @@ OB_INLINE int ObColumnEqualEncoder::is_datum_equal(
     equal = true;
   } else if (is_int_type) {
     equal = (left.get_uint64() == right.get_uint64());
-  } else if (need_binary_equal) {
-    equal = ObDatum::binary_equal(left, right);
   } else {
-    int cmp_ret = 0;
-    ret = cmp_func.cmp_func_(left, right, cmp_ret);
-    equal = (0 == cmp_ret);
+    equal = ObDatum::binary_equal(left, right);
   }
   return ret;
 }