The jira issue is about gandiva. Do you mean filtering in this module only?
If yes, I did some experiments with tatsu and gandiva instead of antlr. And
it was pretty nice and clean to develop PoC for sql-like language. In c++,
antlr model is a bit old school. Also I prefer PEG grammar over lalr. Don't
know a nice CC in cpp for peg grammars. Probably, boost spirit?
On Mon, Feb 8, 2021, 10:23 PM Josh Mayer <joshuaama...@gmail.com> wrote:
> It would be useful to be able to create a filter expression from a string,
> e.g. "date == '2020-01-01' and value >= 1" instead of (field("date") ==
> '2020-01-01') & (field("value") >= 1).
>
> There are some existing libraries that make it pretty easy to do in Python
> (see here <https://gist.github.com/josham/e5a13a16e9f18d7b9056127ac522cf23
> >)
> though an old issue ARROW-3458
> <https://issues.apache.org/jira/browse/ARROW-3458> suggests using Antlr
> and
> C++. If a Python only solution is OK I'd be happy to work on adding the
> feature. If Antlr/C++ is preferred I can help with the grammar and testing
> but probably not the best person to do the C++ work.
>
> Josh
>
