fix config not init when init sys_vars

src/observer/ob_inner_sql_connection.cpp

@@ -352,6 +352,8 @@ int ObInnerSQLConnection::init_session(sql::ObSQLSessionInfo* extern_session, co
     } else if (OB_FAIL(inner_session_.update_sys_variable(SYS_VAR_NLS_TIMESTAMP_TZ_FORMAT,
                                                           ObTimeConverter::COMPAT_OLD_NLS_TIMESTAMP_TZ_FORMAT))) {
       LOG_WARN("update sys variables failed", K(ret));
+    } else if (OB_FAIL(inner_session_.gen_configs_in_pc_str())) {
+      LOG_WARN("fail to generate configuration strings that can influence execution plan", K(ret));
     } else {
       ObString database_name(OB_SYS_DATABASE_NAME);
       if (OB_FAIL(inner_session_.set_default_database(database_name))) {

src/share/config/ob_server_config.h

@@ -104,6 +104,7 @@ public:
   bool in_major_version_upgrade_mode() const { return in_upgrade_mode() && is_major_version_upgrade(); }
   bool enable_new_major() const {  return true; }
   bool in_upgrade_mode() const;
+  bool is_valid() const { return  system_config_!= NULL; };
   int64_t get_current_version() { return system_config_->get_version(); }
 
   // 兼容性需求，兼容老的SPFILE格式

src/sql/session/ob_basic_session_info.cpp

@@ -980,6 +980,8 @@ int ObBasicSessionInfo::init_system_variables(const bool print_info_log, const b
   if (OB_SUCC(ret)) {
     if (OB_FAIL(gen_sys_var_in_pc_str())) { //将影响plan的系统变量序列化并缓存
       LOG_INFO("fail to generate system variables in pc str");
+    } else if (OB_FAIL(gen_configs_in_pc_str())) {
+      LOG_INFO("fail to generate system config in pc str");
     } else {
       global_vars_version_ = 0;
     }
@@ -1637,10 +1639,14 @@ int ObBasicSessionInfo::gen_configs_in_pc_str()
   const int64_t MAX_CONFIG_STR_SIZE = 512;
   char *buf = NULL;
   int64_t pos = 0;
+  if (!GCONF.is_valid()) {
+    // do nothing
+  } else {
     int64_t cluster_config_version = GCONF.get_current_version();
     int64_t tenant_config_version = (::oceanbase::omt::ObTenantConfigMgr::get_instance()).get_tenant_config_version(tenant_id_);
 
-  if (!inf_pc_configs_.is_out_of_date(cluster_config_version, tenant_config_version)) {
+    if (!config_in_pc_str_.empty() &&
+          !inf_pc_configs_.is_out_of_date(cluster_config_version, tenant_config_version)) {
       // unupdated configs do nothing
     } else {
       // update out-dated cached configs
@@ -1670,6 +1676,7 @@ int ObBasicSessionInfo::gen_configs_in_pc_str()
         inf_pc_configs_.update_version(cluster_config_version, tenant_config_version);
       }
     }
+  }
   return ret;
 }
 
@@ -4113,6 +4120,7 @@ int ObBasicSessionInfo::load_all_sys_vars(const ObSysVariableSchema &sys_var_sch
   release_to_pool_ = OB_SUCC(ret);
   if (!is_deserialized_) {
     OZ (gen_sys_var_in_pc_str());
+    OZ (gen_configs_in_pc_str());
   }
   return ret;
 }