This article will walk through the design and rationale behind the StorageEngine, setting the stage for future work on TableManager and beyond.

After we build the AST Tree, we now need to validate SQL statement to make sure it can actual runs.

The parser is the bridge between the flat token sequence from our tokenizer and the hierarchical AST representation that enables semantic analysis and execution.

Before we can build a parser, we need to understand what we're parsing toward - the Abstract Syntax Tree (AST).

In the previous article, I’ve covered the overall structure of my database engine project. This article will focus on the SQL layer. Specially about how to prepare for lexical analysis.

In this post, I’ll walk through the framework and architecture of my project, explain the module separation, and share why I structured the system in this way.

Sometimes when I’m playing games on my phone, ads pop up and I get too lazy to reach for it just to click close. I thought it’d be easier if I could control my phone directly with my mouse while sitting at the computer—and that’s how I ended up using scrcpy.

What started as a small classroom exercise—just moving a single player around the console to eat food—quickly grew into something bigger. The more I coded, the more fun it became, and before I knew it, I had expanded the idea into a full Snake game.

This blog is a note of learning C# and .NET.

GitHub Actions is a CI/CD and automation tool built into GitHub. Workflows allow you to automate tasks like testing, building, deploying, or managing your code lifecycle.

This note covers the management and monitoring, governance and compliance and cost management. This section account for about 30%-35% of the exam and provide a solid understanding of manage and governance Azure.

This note covers the compute, networking, and storage services sections of the AZ-900 exam. It includes key Azure services such as virtual machines, virtual networks, and storage accounts, along with modern tools like Azure Functions and Azure OpenAI. These sections account for about 35–40% of the exam and provide a solid understanding of Azure’s core service offerings.

This note covers key topics from the AZ-900 exam, including Azure architecture, Microsoft Entra ID, and Azure security. It introduces core concepts like global infrastructure, identity management, and security tools such as Conditional Access and Defender for Cloud. Together, these topics make up about 35–40% of the exam and form the foundation of Azure fundamentals.

This note covers the Cloud Concepts section of the Microsoft Azure Fundamentals (AZ-900) exam. It includes key topics like cloud service models, types of cloud computing, and the benefits of cloud computing. This section accounts for 25-30% of the exam and helps you build a foundational understanding of cloud technologies.

I came up with this issue because I want to block my photoshop to connect to network, it will always check my license and says this product is limited, which is very annoying… So I decided to block it from internet.

This article covers the fundamentals of data modeling, including keys, relationships, attributes, normalization, dependencies, and data integrity, as well as the differences between relational and non-relational databases and constraints in database design.

This article dives into Java threading concepts, covering thread creation, lifecycle, synchronization, and thread safety — essential for writing efficient, concurrent, and deadlock-free programs.

This section covers the new features of Java 8. Like Optional Class and Functional interfaces and also Stream API, and other features.