zhixingheyi-tian

> @zhixingheyi-tian Once you've fixed the issues mentioned, could you also rebase on the latest master branch? Once you do that we can run the benchmark. Have rebased. Performance can...

> The failures in the continuous-integration/appveyor/pr seem relevant. This test is failing: > > https://github.com/apache/arrow/blob/85b167c05c2f93a95b23e8ac4fd4da576ea5b899/python/pyarrow/tests/parquet/test_basic.py#L715-L742 > > Perhaps we need to make sure that if there are null values that...

@aihuaxu @sunchao @zhangbutao Please give a review.

@zhangbutao My patch also can fix issue when "set hive.metastore.dml.events=true"

> http://ci.hive.apache.org/blue/organizations/jenkins/hive-precommit/detail/PR-4993/1/pipeline serveral failed tests seems to be related this change. You can try to explore the reason. How to open the error log? thanks,