docs: public String updateByPrimaryKey(MappedStatement ms) {
          Class<?> entityClass = getEntityClass(ms);
          StringBuilder sql = new StringBuilder();
          sql.append(SqlHelper.updateTable(entityClass, tableName(entityClass)));
          sql.append(SqlHelper.updateSetColumns(entityClass, null, false, false));
          sql.append(SqlHelper.wherePKColumns(entityClass, true));
          return sql.toString();
      }