🚀 Database Engine Prototype

A lightweight, high-performance Java-based database engine showcasing core relational operations and advanced multi-dimensional indexing. Perfect for data-science infrastructure and systems-engineering portfolios!

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🎯 Overview

• Language: Java
• Storage: Serialized disk pages + CSV metadata
• Indexing: Custom Octree (3-dimensional)
• Use Cases: Learning database internals, building analytics backends, prototyping query engines

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✨ Key Capabilities

Feature	Description
🔧 Relational Data Management	Define flexible schemas (Integer, String, Double, Date) & perform full CRUD workflows.
📊 Octree Indexing	3D spatial indexing for ultra-fast range and point searches over multi-attribute data.
💾 Optimized Storage

• Serialized Pages: Persistent, thread-safe storage
• Lazy Loading: Pages load on demand to minimize memory footprint | | ⚙️ Concurrency-Ready I/O | Vector-backed reads/writes ensure safe multi-threaded access. |

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🛠️ Technical Highlights

1. Java Core & Serialization

   • Clean package structure under com.yourorg.dbapp
   • Java’s built-in serialization for persistence

2. Metadata-Driven Design

   • Table schemas, constraints, and index configs in a simple CSV file
   • Easy to extend or migrate to alternative metadata stores

3. Custom Octree Implementation

   • Supports up to three indexed columns
   • Efficient insertion, deletion, and range-query algorithms

4. Performance Strategies

   • Lazy Page Loading: Minimize RAM usage
   • Vector I/O Buffers: Atomic, thread-safe disk operations

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⚙️ Installation & Setup

1. Clone

   git clone https://github.com/yourusername/database-application-project.git
   cd database-application-project

Compile

bash Copy Edit javac -cp ".:libs/" src/main/java/com/yourorg/dbapp/.java Run

bash Copy Edit java -cp ".:libs/*:src/main/java" com.yourorg.dbapp.DBApp 📖 Usage Guide Initialize Database

Launch the console interface

Create tables by specifying column names & types

Data Operations

INSERT: Add new rows

SELECT: Query with optional Octree-backed filters

UPDATE/DELETE: Modify or remove data

Index Management

Create Octree indices on up to three columns

Monitor query performance improvements

Tuning

Adjust page size in configuration for different workloads

Compare performance with/without indices

🤝 Contributing I welcome enhancements, especially:

Alternative index structures (R-trees, LSM-trees)

Transaction support & concurrency controls

Integrations with SQL parsers or query planners

Fork the repo

Create a feature branch

Submit a pull request

📄 License This project is released under the MIT License. See LICENSE.md for details.