I've just added this project grammar to https://mingodad.github.io/parsertl-playground/playground/ an `Yacc/Lex` compatible online editor/tester (select `JsSql parser` from `Examples` then click `Parse` to see the parse tree for the content in `Input source`). From there we can also generate an `EBNF` understood by (IPV6) https://www.bottlecaps.de/rr/ui or (IPV4) https://rr.red-dove.com/ui to generate a nice navigable railroad diagram. I hope it can help develop/debug/document this project grammar. Any feedback is welcome !