Publicly export `arrow_string::Predicate` and its methods?

[jhorstmann]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

I have two usecases where I would like to reuse the logic in Predicate outside of arrow-rs:

• When processing data in many small batches I'd like to build a Regex only once and reuse that predicate, instead of arrow having to translate the pattern separately for each batch.
• I have some row-based expression evaluation code that should also support LIKE expressions, it would be great to be able to reuse the same optimized translation into regular expressions as for array evaluation.

Describe the solution you'd like

Making Predicate and its methods public would allow me to solve those usecases

Describe alternatives you've considered

Copying the code into my project would be an alternative.

Additional context

[jhorstmann]

The life times make it a bit difficult to reuse for me, will probably end up with an own implementation instead. I'll leave the issue open for a while to see if others are interested in exposing it.

[jhorstmann]

I ended up reimplementing parts of the Predicate code without the lifetimes.