diff --git a/src/sql/optimizer/ob_log_table_scan.cpp b/src/sql/optimizer/ob_log_table_scan.cpp
index 007db0ce04..486b42772a 100644
--- a/src/sql/optimizer/ob_log_table_scan.cpp
+++ b/src/sql/optimizer/ob_log_table_scan.cpp
@@ -152,7 +152,7 @@ int ObLogTableScan::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("get unexpected null", K(ret));
   } else if (OB_FAIL(generate_access_exprs())) {
-    LOG_WARN("failed to generate acess exprs", K(ret));
+    LOG_WARN("failed to generate access exprs", K(ret));
   } else if (NULL != limit_count_expr_ &&
              OB_FAIL(all_exprs.push_back(limit_count_expr_))) {
     LOG_WARN("failed to push back expr", K(ret));
@@ -317,7 +317,7 @@ int ObLogTableScan::copy_filter_before_index_back()
         } else {
           bool is_contain_vir_gen_column = false;
           // ObArray<ObRawExpr *> column_exprs;
-          // scan_pushdown before index back conculde virtual generated column
+          // scan_pushdown before index back conclude virtual generated column
           // need copy for avoiding shared expression.
           if (OB_FAIL(ObRawExprUtils::contain_virtual_generated_column(filters.at(i), is_contain_vir_gen_column))) {
             LOG_WARN("fail to contain virtual gen column", K(ret));
@@ -1836,7 +1836,7 @@ int ObLogTableScan::print_used_hint(PlanText &plan_text)
         } else if (!is_skip_scan() && T_INDEX_SS_HINT == hint->get_hint_type()) {
           /* is not index skip scan but exist index_ss hint */
         } else if (OB_FAIL(hint->print_hint(plan_text))) {
-          LOG_WARN("failed to print indedx hint", K(ret), K(*hint));
+          LOG_WARN("failed to print index hint", K(ret), K(*hint));
         }
       }
     } else {// print all no index
@@ -1847,7 +1847,7 @@ int ObLogTableScan::print_used_hint(PlanText &plan_text)
           ret = OB_ERR_UNEXPECTED;
           LOG_WARN("unexpected NULL", K(ret), K(hint));
         } else if (OB_FAIL(hint->print_hint(plan_text))) {
-          LOG_WARN("failed to print indedx hint", K(ret), K(*hint));
+          LOG_WARN("failed to print index hint", K(ret), K(*hint));
         }
       }
     }
diff --git a/src/sql/optimizer/ob_opt_est_cost_model.cpp b/src/sql/optimizer/ob_opt_est_cost_model.cpp
index f2beaef485..ac2bdb26aa 100644
--- a/src/sql/optimizer/ob_opt_est_cost_model.cpp
+++ b/src/sql/optimizer/ob_opt_est_cost_model.cpp
@@ -86,7 +86,7 @@ double ObTableMetaInfo::get_micro_block_numbers() const
 {
   double ret = 0.0;
   if (micro_block_count_ <= 0) {
-    // calculate micore block count use storage statistics
+    // calculate micro block count use storage statistics
     ret = 0;
   } else {
     // get micro block count from optimizer statistics
@@ -1399,7 +1399,7 @@ int ObOptEstCostModel::cost_table_get_one_batch(const ObCostTableScanInfo &est_c
                    OB_FAIL(cost_table_lookup_rpc(index_back_row_count,
                                                 est_cost_info,
                                                 network_cost))) {
-          LOG_WARN("failed to get newwork transform cost for global index", K(ret));
+          LOG_WARN("failed to get network transform cost for global index", K(ret));
         } else {
           get_cost = base_cost + ib_cost + network_cost;
           get_index_back_cost = ib_cost + network_cost;
diff --git a/src/sql/optimizer/ob_opt_est_utils.h b/src/sql/optimizer/ob_opt_est_utils.h
index 6701cd8bb1..cc36776269 100644
--- a/src/sql/optimizer/ob_opt_est_utils.h
+++ b/src/sql/optimizer/ob_opt_est_utils.h
@@ -155,7 +155,7 @@ private:
                                             uint64_t &convertable_map,
                                             int64_t pos);
   // 1, find common prefix length of strings
-  // 2, find dynamix base and offset of strings
+  // 2, find dynamic base and offset of strings
   // 3, use dynamic base and offset to convert strings to scalars
   static int convert_strings_to_scalar(const common::ObIArray<common::ObString> &origin_strs,
                                        common::ObIArray<double> &scalars);