python 3.6.4
- update index when doing insert operation
- complete init finalize on each class
- insert b+ tree in index.py
- create index
- select
- drop
- 非index的select操作以及多个select操作的连接
- delete
- b+ Tree 删除parent的维护操作
- output 美化
- do execfile
- help command
- 理解正向肯定预查
- python decorator
- 插入了相同key引发冲突会有bug 后续select有问题。(连续执行两次sql.txt)
- 规范文件io
- report完成