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 !