Database Management Systems

Programming Assignment 1: Metadata Management

Overview

In this assignment, you will write a program that allows a database user to manage the metadata of their relational data. By metadata, we mean the databases high-level information (e.g., databases name, creation time, owner) as well as the properties of the tables (e.g., tables names, attributes, constraints).

System Design

• You are free (in fact, encouraged) to come up with your own design o For instance, Sqlite3 uses one single file for each database.
• Here is one possible design:

o One Linux directory -> a database o One regular file -> a table

Implementation

• The program should not use an external database library or an existing SQL parser/compiler.
• Any programming language is acceptable, e.g., Python, Java, C/C++, Go o Please pick one that you are most comfortable/proficient with o If you want to choose a language not mentioned above, please contact the TA before you start coding
• Functionalities:
  • Database creation, deletion
  • Table creation, deletion, update, and query

Interface

• A similar but simpler interface than Sqlite3
• Examples (on a Linux terminal):

o # ./<your_program> <enter>

# CREATE DATABASE db_name <enter>;

▪ The shell should prompt whether the command is successful or failed

• If failed, dont crash but gracefully prompt why

▪ Then when you check your file system, it might look like this:

• ~/your_home/cs457/pa1/db_name

o # ./<your_program> <enter>

# USE db_1; CREATE TABLE test_tbl (a1 int, a2 char(9)); ▪ If successful, then your file system might look like this:

• ~/your_home/cs457/pa1/db1/test_tbl

1 CS457/657 Database Management Systems, University of Nevada, Reno

Testing

• We will test your program on Ubuntu (version 14 or above)
• If your program cannot compile on our testbed, we may ask you to demo your program o Hint: try not to use many exotic libraries
• A full test script will be provided o # ~/cs457/pa1/<your_program> < sql (expect the standard input)
  • Alternatively, you can use a file name as an argument to your program.
  • You will NOT lose points by only supporting a filename-argument interface, but keep in mind that the standard input interface would be more desirable for your users (e.g., our TA, Abdullah).

o # <expected output, hopefully> o You dont need to parse the comment lines (i.e., starting with – -) o We will not to test your programs with any other scripts/commends ▪ However, its always good to consider more edge cases ▪ Try not to hardcode your parser:

• You want to parse them into a series of (dynamic) words

Grading (20 points total)

• This is an individual assignment.
• Design document that clarifies the followings: (5 points) o How your program organizes multiple databases o How your program manages multiple tables o At a very high level, how you implement those required functionalities
• Source code (15 points) o Coding style and clarity, 5 points
  • Appropriate parenthesis locations, indention, etc.
  • Always write comments at the beginning of any files
• Author, date, history, etc.
  • Always write comments at the beginning of any non-trivial class/function
• What this class/function does, high-level algorithm if needed
  • Write in-line comments for non-trivial blocks of code o Functionality, 10 points
  • Refer to the test script for detailed breakdowns

Submission

• WebCampus
• Compress all your source code and report into one package in this format:

o <your_netid>_pa1

• Late penalty: 10% per day

2 CS457/657 Database Management Systems, University of Nevada, Reno