[Fix] fix same cte table name in different subquery resolve bug

src/sql/resolver/dml/ob_dml_resolver.cpp

@@ -15197,6 +15197,7 @@ int ObDMLResolver::resolve_with_clause_subquery(const ParseNode &parse_tree, Tab
                                   cycle_pseudo_column_name) );
     cur_select_resolver->set_current_recursive_cte_table_item(NULL);
     cur_select_resolver->set_current_cte_involed_stmt(NULL);
+    OZ ( schema_checker_->remove_tmp_cte_schemas(select_resolver.cte_ctx_.get_current_cte_table_name()) );
   }
   return ret;
 }

src/sql/resolver/dml/ob_dml_resolver.h

@@ -109,6 +109,7 @@ class ObDMLResolver : public ObStmtResolver
     }
     inline void set_is_with_resolver(bool is_with_resolver) { is_with_clause_resolver_ = is_with_resolver; }
     inline void set_current_cte_table_name(const ObString& table_name) { current_cte_table_name_ = table_name; }
+    inline ObString& get_current_cte_table_name() { return current_cte_table_name_; }
     inline bool is_with_resolver() const { return is_with_clause_resolver_; }
     inline void set_recursive(bool recursive) { is_recursive_cte_ = recursive; }
     inline void set_in_subquery() { is_cte_subquery_ = true; }

src/sql/resolver/ob_schema_checker.cpp

@@ -2973,5 +2973,20 @@ bool ObSchemaChecker::is_ora_priv_check()
     return false;
 }
 
+int ObSchemaChecker::remove_tmp_cte_schemas(const ObString& cte_table_name)
+{
+  int ret = OB_SUCCESS;
+  for (int64_t i = 0; OB_SUCC(ret) && i < tmp_cte_schemas_.count(); i++) {
+    if (cte_table_name == tmp_cte_schemas_.at(i)->get_table_name()) {
+      if(OB_FAIL(tmp_cte_schemas_.remove(i))) {
+        LOG_WARN("remove from tmp_cte_schemas_ failed.", K(ret));
+      } else {
+        break;
+      }
+    }
+  }
+  return ret;
+}
+
 }//end of namespace sql
 }//end of namespace oceanbase

src/sql/resolver/ob_schema_checker.h

@@ -519,6 +519,8 @@ public:
   int get_directory_id(const uint64_t tenant_id,
                        const common::ObString &directory_name,
                        uint64_t &directory_id);
+
+  int remove_tmp_cte_schemas(const ObString& cte_table_name);
 private:
   int get_link_table_schema_inner(uint64_t table_id,
                              const share::schema::ObTableSchema *&table_schema) const;