Self-implemented Videx-stat-server With SpringBoot

HI， 我目前想基于springboot 实现Videx-stat-server， 查看接口/ask_videx 发现optimizer 层主要通过Http 获取如下几个统计信息：

对于这几个统计方法的描述不知道我理解的对不对？
1. table_model.scan_time： 实际计算的是如果全表扫描，花费的代价是多少
2. table_model.get_memory_buffer_size：这个很直白， 获取memory_buffer_size大小，估计是用来评估JOIN 或者创建零时表的成本
3. table_model.records_in_range：这个应该是核心，根据条件和我们的ndv+直方图，返回预估满足条件的行数
4. table_model.info_low：返回表的一些基础信息

Videx 从server获取信息是不是只需要这几个信息？这对我springboot实现很重要，盼回复！谢谢：）

Start with the /ask_videx endpoint and the optimizer code that calls table_model.scan_time, get_memory_buffer_size, records_in_range, and info_low. Trace the server-side contract and compare it with the proposed SpringBoot implementation. The issue has no defined implementation scope or acceptance criteria; done would require a confirmed protocol and documented response requirements.

Written by the indexing model from the issue text.