[steinroe]

sorry, I think I misunderstood your question!

after all, we did not implement a "real" parser. we just use libpg_query, the actual Postgres parser, and work around its limitations as good as possible. The implementation thereby required maximum flexibility. we never define any grammar other than "a select statement starts with a SELECT keyword".

[ahoka]

Parser combinations are very powerful! For example your function whitespace_tokens could be something like:

whitespace_tokens = many1(choice(‘ ‘, ‘\t’, ‘\n’)).map(m -> token(m))