code: public boolean apply(EntryPosition position, String schema, String ddl, String extra) {
          if (tableMetaTSDB != null) {
              return tableMetaTSDB.apply(position, schema, ddl, extra);
          } else {
              // ignore
              return true;
          }
      }
docs: 更新一下本地的表结构内存
  
  @param position
  @param schema
  @param ddl
  @return