Made GroupFilter optional in parquet'sRecordReader and added method to set it.

[jorgecarleitao]

This is more expressive since filtering is optional.

Backward incompatible changes

The function RecordReader::try_new now expects Option<GroupFilter> instead of GroupFilter. If you were not using filtering, migrate to this by passing None. If you were filtering, pass Some(...) instead.

[houqp]

Could we also expose RecordReader.metadata so it can be used to build the row group filter?

[codecov]

Codecov Report

Merging #386 (3abb7f8) into main (877739b) will increase coverage by 0.11%.
The diff coverage is 36.36%.

@@            Coverage Diff             @@
##             main     #386      +/-   ##
==========================================
+ Coverage   81.12%   81.24%   +0.11%     
==========================================
  Files         331      331              
  Lines       21957    22215     +258     
==========================================
+ Hits        17813    18048     +235     
- Misses       4144     4167      +23     

Impacted Files	Coverage Δ
src/io/parquet/read/record_batch.rs	81.25% <12.50%> (-5.42%)	⬇️
tests/it/io/parquet/mod.rs	94.88% <100.00%> (-0.10%)	⬇️
tests/it/io/parquet/read.rs	98.46% <100.00%> (ø)
tests/it/array/primitive/mutable.rs	100.00% <0.00%> (ø)
src/bitmap/mutable.rs	90.14% <0.00%> (+0.93%)	⬆️
src/array/primitive/mutable.rs	88.69% <0.00%> (+1.92%)	⬆️
src/compute/like.rs	66.92% <0.00%> (+6.53%)	⬆️

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[jorgecarleitao]

Could we also expose RecordReader.metadata so it can be used to build the row group filter?

done 👍

[houqp]

LGTM

[jorgecarleitao]

This has been released under v0.5.0, @houqp

[houqp]

I am using git commit in my local arrow2 migration branch at the moment, but good to know we could release at a much faster cadence :D