We opened Chapter 1 with a single line, SELECT * FROM users WHERE id = 1 . For that line to leave the client and come back as a result row, the PostgreSQL backend went through five stages. First it decided which processing path the message should take; then the parser and analyzer turned the te...
Source: [Dev.to](https://dev.to/joonghyukshin/closing-chapter-1-from-query-to-data-33nb)