>>105629359
E should be ExtractableError or something like that actually
but anyway no, it is convention to use single letters
also, reminder that SQL is just as important as your language is
using database transactions removes like 95% of concurrency issues in many applications
also, the concept of indexes, imo, make for far more expressable queries and update techniques than using normal data structures like hash maps and whatever, where you must keep adjacent structures in sync