2019/12/02 和Yi Wang沟通交流考虑SQLFLOW可以支持如下的特性

一、基础功能：好用的工具需要一个更加简易友好的界面，让业务开发/分析更加简单
1)设计分析类工具，提供自动联想输入、快速语法、常见语义错误，提升用户体验
应用场景：提供IDE的自动联想功能，提高开发效率；语法和基本语义提前检查，避免提交到后台，执行较长时间后报错
2)大数据量时时间较长，建议提供任务(job)管理、允许用户了解数据执行的状态、监控进度、提供动态调试、watch能力，方便用户感知和调优
应用场景：耗时任务可以快速了解整体进度，提供一些中间的过程信息、耗时等，方便用户进行调优,优化开发
3) 安全权限、用户管理、
应用场景：增加新的数据分析人员、用户权

This is issue is about prestosql/docker-images#76, posted here for make it more visible.

Some config like EnableConnLimit isn't used anywhere and can be removed.

What I Did
I was searching for the db connection limiting.

What I Saw
I ran into EnableConnLimit in config.go

What I Expect
I wanted to find the MaxDbConnPerSec.

IndexLogEntry exposes helper methods to provide aliases to members, but some of them do computations (e.g., schema and hasLineageColumn. They can be marked as lazy val with @JsonIgnore

Also, hasLineageColumn doesn't need to check the case, thus can be simplified.