This is not the first educational project I've seen that insists on manually writing the parser. Call me contrarian but I find the article's approach poor (at

This is not the first educational project I've seen that insists on manually writing the parser. Call me contrarian but I find the article's approach poor (at least, as it is now). If one looks at the overall content of the two articles of the series, 70%/80% of the content (or possibly more) is parsing, which is arguably the least interesting, or at least, the most boilerplate, part of a database system.