Database Project

This project implements a simple database system with a client-server architecture.

Features

TCP-based client-server communication
Interactive command-line interface for the client
Basic key-value store operations (GET, SET, UPDATE, DEL)
B-tree index for efficient data storage and retrieval

Project Structure

backend/: Contains the database server implementation
database-client/: Contains the client implementation

Getting Started

Clone the repository
Run cargo build to compile the project
Start the server with cargo run
Run the client with cargo run --bin client

Usage

Once connected to the database, you can use the following commands:

GET <key>: Retrieve the value associated with the given key
SET <key> <value>: Set a key-value pair (also supports operations like +, -, ...)
UPDATE <key> <value>: Update an existing key-value pair
DEL <key>: Delete a key-value pair
STRLEN <key>: Get the length of the value associated with the given key
STRCAT <key> <key2>: Concatenate the values of two keys and store the result in a third key
SUBSTR <key> <start> <end>: Get a substring of the value associated with the given key
exit: Quit the client
help: Display available commands

Expression Examples:

EXPR(GET 1 + GET 2): Retrieve the value associated with key 1 and key 2, then add them together.
EXPR(GET 1 * 2): Retrieve the value associated with key 1 and multiply it by 2.

Use TAB for command completion in the client interface.

Future Improvements

Improve error handling and logging

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.