Github user mdespriee commented on the issue:
https://github.com/apache/spark/pull/17461
Hi @sprintcheng,
This PR is stale and is not even mergeable. I haven't had any feedback from
spark maintainers since more than a year. @hhbyyh suggested to wait for #18610
which is also stale.
If there is enough interest in this feature, I could update it quickly and
have it ready to merge.
I suggest we discuss this in the original JIRA
(https://issues.apache.org/jira/browse/SPARK-20082)
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