Mini Key-Value Database

A simple key-value database written in C++17, CMake and nlohmann/json. It supports basic operations like put, get, and delete, and stores data in a JSON file.

Features

• Supports multiple data types: int, double, string.
• std::variant is used for storing different data types.
• A classical CRUD interface with add, get, update, and delete operations.
• It stores data in a JSON file for persistence.
• Displaying sorting and filtering of key-value pairs.
• Displaying statistics about the stored data.

Requirements

• C++17 compatible compiler
• CMake 3.10 or higher
• Internet connection to download nlohmann/json library

Building the Project

1. Clone the repository

2. Create a build directory and navigate into it:

   mkdir build
   cd build

3. Run CMake to configure the project:

   cmake ..

4. Build the project:

   cmake --build .

Example Usage

./mini_kv_db add username "cpprian"
./mini_kv_db add age 25
./mini_kv_db add balance 1234.56

# Read a record
./mini_kv_db get username

# Update a record
./mini_kv_db update age 26

# Search for a record
./mini_kv_db search user

# Display all records
./mini_kv_db list

# Delete a record
./mini_kv_db delete balance

# Clear the database
./mini_kv_db clear

# Display statistics
./mini_kv_db stats

Interactive Mode

You can also run the database in interactive mode:

./mini_kv_db interactive

# Or simply
./mini_kv_db

Todo List

• Transaction support (ACID properties)
• Concurrency control
• Indexing for faster searches
• Backup and restore functionality
• Encryption for data security
• Network support for remote access (TCP/HTTP server)
• Unit tests and integration tests (Google Test)
• Docker support
• Benchmarking