diff --git a/src/sql/optimizer/ob_join_order.h b/src/sql/optimizer/ob_join_order.h
index 560839f048..af01053599 100644
--- a/src/sql/optimizer/ob_join_order.h
+++ b/src/sql/optimizer/ob_join_order.h
@@ -140,7 +140,7 @@ namespace sql
     ObRelIds R_TES_;
     //left degenerate set，用于检查join condition为退化谓词的合法性，存放的是左子树的所有表集
     ObRelIds L_DS_;
-    //right degnerate set，存放的是右子树的所有表集
+    //right degenerate set，存放的是右子树的所有表集
     ObRelIds R_DS_;
     bool is_degenerate_pred_;
     //当前join是否可交换左右表
@@ -1674,7 +1674,7 @@ struct NullAwareAntiJoinInfo {
                       bool &sort_match);
 
     /**
-     * 检查是否是intersting order
+     * 检查是否是interesting order
      * @keys 索引列
      * @stmt
      * @interest_column_ids 匹配的索引列的id
diff --git a/src/sql/optimizer/ob_log_insert.cpp b/src/sql/optimizer/ob_log_insert.cpp
index 3c1f5c2ffd..e2c5fd9af3 100644
--- a/src/sql/optimizer/ob_log_insert.cpp
+++ b/src/sql/optimizer/ob_log_insert.cpp
@@ -455,7 +455,7 @@ int ObLogInsert::generate_multi_part_partition_id_expr()
         ObRawExprCopier copier(get_plan()->get_optimizer_context().get_expr_factory());
         if (OB_ISNULL(index_info)) {
           ret = OB_ERR_UNEXPECTED;
-          LOG_WARN("replae dml info is null", K(ret));
+          LOG_WARN("replace dml info is null", K(ret));
         } else if (OB_FAIL(generate_old_calc_partid_expr(*index_info))) {
           LOG_WARN("failed to generate calc partid expr", K(ret));
         } else if (!is_heap_table && OB_FAIL(ObLogTableScan::replace_gen_column(get_plan(),
@@ -478,7 +478,7 @@ int ObLogInsert::generate_multi_part_partition_id_expr()
       }
     }
   } else if (get_insert_up()) {
-    // generate the calc_part_id_expr_ of update caluse
+    // generate the calc_part_id_expr_ of update clause
     for (int64_t i = 0; OB_SUCC(ret) && i < get_insert_up_index_dml_infos().count(); ++i) {
       IndexDMLInfo *dml_info = get_insert_up_index_dml_infos().at(i);
       ObSqlSchemaGuard *schema_guard = NULL;
diff --git a/src/sql/optimizer/ob_log_unpivot.cpp b/src/sql/optimizer/ob_log_unpivot.cpp
index 073c8877d2..95b82b7c51 100644
--- a/src/sql/optimizer/ob_log_unpivot.cpp
+++ b/src/sql/optimizer/ob_log_unpivot.cpp
@@ -344,7 +344,7 @@ int ObLogUnpivot::compute_fd_item_set()
       /*do nothing*/
     } else if (OB_NOT_NULL(fd_item_set) && // rollup 时 fd_item_set is null
                OB_FAIL(deduce_const_exprs_and_ft_item_set(*fd_item_set))) {
-      LOG_WARN("falied to deduce fd item set", K(ret));
+      LOG_WARN("failed to deduce fd item set", K(ret));
     } else {
       set_fd_item_set(fd_item_set);
     }
diff --git a/src/sql/optimizer/ob_optimizer_util.h b/src/sql/optimizer/ob_optimizer_util.h
index 78f3833029..6afd4b5a62 100644
--- a/src/sql/optimizer/ob_optimizer_util.h
+++ b/src/sql/optimizer/ob_optimizer_util.h
@@ -208,7 +208,7 @@ public:
   static bool same_exprs(const common::ObIArray<ObRawExpr*> &src_exprs,
                          const common::ObIArray<ObRawExpr*> &target_exprs);
 
-  //for topk, non terminal expr with agg params need to be deep copyed to prevent sum being replaced
+  //for topk, non terminal expr with agg params need to be deep copied to prevent sum being replaced
   //with sum(sum)
   static int clone_expr_for_topk(ObRawExprFactory &expr_factory, ObRawExpr* src, ObRawExpr* &dst);
 
@@ -1592,7 +1592,7 @@ int ObOptimizerUtil::intersect(const ObIArray<T> &first,
  /**
    * @brief intersect, to reduce the assign cost when computing many sets' overlap.
    * @param sets the element sets to calculate the overlap.
-   * @param result the reuslt of the overlap
+   * @param result the result of the overlap
    * @return
    */
 template <class T>
diff --git a/src/sql/optimizer/ob_sharding_info.cpp b/src/sql/optimizer/ob_sharding_info.cpp
index e6bacb5451..e15d5a18c9 100644
--- a/src/sql/optimizer/ob_sharding_info.cpp
+++ b/src/sql/optimizer/ob_sharding_info.cpp
@@ -114,7 +114,7 @@ int ObShardingInfo::init_partition_info(ObOptimizerContext &ctx,
     }
     // virtual table can't get part idx from mock list table schema
     // so don't call extract_all_partition_indexes,
-    // and not used pwj enhence on virtual table
+    // and not used pwj enhance on virtual table
     if (is_virtual_table(ref_table_id)) {
       // do nothing
     } else if (OB_FAIL(ObPwjComparer::extract_all_partition_indexes(phy_table_location_info,
@@ -160,7 +160,7 @@ int ObShardingInfo::set_partition_key(
         }
       }
     } else if (OB_FAIL(partition_keys.push_back(part_expr))) {
-      LOG_WARN("Failed to add partiton column expr", K(ret));
+      LOG_WARN("Failed to add partition column expr", K(ret));
     } else { }
   }
   return ret;
@@ -471,7 +471,7 @@ int ObShardingInfo::check_if_match_partition_wise(const EqualSets &equal_sets,
                                                        is_partition_wise))) {
         LOG_WARN("failed to check if match partition wise join", K(ret));
       } else if (is_partition_wise) {
-        LOG_TRACE("suceed to check if match partition wise join", K(is_partition_wise));
+        LOG_TRACE("succeed to check if match partition wise join", K(is_partition_wise));
       } else if (OB_FAIL(append(left_sharding, left_weak_sharding)) ||
                  OB_FAIL(append(right_sharding, right_weak_sharding))) {
         LOG_WARN("failed to append sharding info", K(ret));
@@ -546,7 +546,7 @@ int ObShardingInfo::check_if_match_extended_partition_wise(const EqualSets &equa
                                                                 is_ext_partition_wise))) {
         LOG_WARN("failed to check if match extended partition wise join", K(ret));
       } else if (is_ext_partition_wise) {
-        LOG_TRACE("suceed to check if match extended partition wise join", K(is_ext_partition_wise));
+        LOG_TRACE("succeed to check if match extended partition wise join", K(is_ext_partition_wise));
       } else if (OB_FAIL(append(left_sharding, left_weak_sharding)) ||
                  OB_FAIL(append(right_sharding, right_weak_sharding))) {
         LOG_WARN("failed to append sharding info", K(ret));