Home

Some Reference:

http://stackoverflow.com/questions/26566641/what-does-it-mean-to-return-an-iterator-java

Tuple class:

1. how to store the field item corresponding to the structure of schema? I just use an array ?
2. The Throw in toString() function

Category class: I use the hashmap to keep track of the database table.

HeapFileId: HashCode里的exception是干嘛

HeapPage: Don't know the bit manipulation (isSlotEmpty)