Commits
tianchen authored and Micah Kornfield committed a222c7d4ddf
ARROW-5835: [Java] Support Dictionary Encoding for binary type Related to [ARROW-5835](https://issues.apache.org/jira/browse/ARROW-5835). Now is not implemented because byte array is not supported to be HashMap key. One possible way is that wrap them with something to implement equals and hashcode. Author: tianchen <niki.lj@alibaba-inc.com> Closes #4792 from tianchen92/ARROW-5835 and squashes the following commits: f50a19e73 <tianchen> fix UNION regression 8267c2b2a <tianchen> fix style a039bc1fd <tianchen> Support Dictionary Encoding for binary type