Commits
tianchen authored and Micah Kornfield committed 34dd3edece6
ARROW-6097: [Java] Avro adapter implement unions type Related to [ARROW-6097](https://issues.apache.org/jira/browse/ARROW-6097). Support convert unions type like ["string"], ["string", 'int"] and nullable ["string", "int", "null"] Closes #4984 from tianchen92/ARROW-6097 and squashes the following commits: 0cdca698b <tianchen> fix documents 3cc028fbe <tianchen> add constant INVALID_NULL_INDEX b4a24637b <tianchen> add comment 656408847 <tianchen> refactor b4d0fbe3e <tianchen> resolve comments 15e808c80 <tianchen> ARROW-6097: Avro adapter implement unions type Authored-by: tianchen <niki.lj@alibaba-inc.com> Signed-off-by: Micah Kornfield <emkornfield@gmail.com>