HackerNews Summary (2023-05-04 06PM)

Source: Let’s Build a Simple Database

Summary
A developer is building a clone of SQLite from scratch in C to better understand databases and their inner workings. The project will be documented as it progresses.

Fact

💽 Data is saved in a specific format on both disk and in memory.

💾 Data moves from memory to disk when a transaction is committed.

🔑 There can only be one primary key per table because it uniquely identifies each row.

⏪ Rolling back a transaction involves undoing any changes made to the database during the transaction.

📚 Indexes are formatted based on the data they’re indexing and can be of different types.

🔍 A full table scan happens when the database searches every row in a table for a specific condition.

📝 A prepared statement is saved in a compiled format, ready to be executed.

💻 Databases work by storing and retrieving data based on queries, using tables with rows and columns to organize the data.

Source: Rivian R1T Fender Bender Turns Into $42,000 Repair Bill

Summary
The total cost of repairing Chris Apfelstadt’s rear-ended Rivian R1T was $42,000, despite the other driver’s insurance company estimating the repair to be $1,600. Rivian is designed to absorb impacts and limit injuries by inspecting several parts in the event of a collision.

Fact

💸 The total cost of repairing Chris Apfelstadt’s rear-ended Rivian R1T was $42,000, close to maxing out the other driver’s $50,000 insurance payout limit.

🚗 The Rivian truck is designed to absorb the impact to limit injuries to the driver and passengers, so in the event of a collision, they need to inspect a lot of parts to make sure they were not damaged.

🔧 The repair shop followed the book written by Rivian in fixing Chris Apfelstadt’s truck.

🤝 Chris Apfelstadt was satisfied with the job done on his Rivian R1T and said “I don’t think anyone could do it better.”

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