[ANNOUNCE] Weekly Community Update 2019/52

[Hequn Cheng]

Dear community,

Happy to share a short community update this week. Due to the holiday, the
dev@ mailing list is pretty quiet these days.

Flink Development
==============

* [sql] Jark proposes to correct the terminology of "Time-windowed Join" to
"Interval Join" in Table API & SQL before 1.10 is released. In this way,
the terminology is aligned between Table API and DataStream. [1]

* [sql] The discussion of Flip-90(Support SQL 2016-2017 JSON functions in
Flink SQL) received some minor feedback from the community. The feedback is
mainly about aligning Table API and SQL, for example, also add ON ERROR and
ON EMPTY clause support for Table API. [2]

[1]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Correct-the-terminology-of-quot-Time-windowed-Join-quot-to-quot-Interval-Join-quot-in-Table-L-td36202.html
[2]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Support-JSON-functions-in-Flink-SQL-td32674.html

Notable Bugs
==========

[FLINK-15406] [1.9.1] The savepoint is written by "State Processor API"
can't be restored by map or flatmap. [3]
[FLINK-15421] [1.9.1] [1.10.0] GroupAggsHandler throws
java.time.LocalDateTime cannot be cast to java.sql.Timestamp. [4]

[3] https://issues.apache.org/jira/browse/FLINK-15406
[4] https://issues.apache.org/jira/browse/FLINK-15421

Events, Blog Posts, Misc
===================

* Upcoming Meetups
  * On January 8th, Christophe will talk about how to build data platform
with Kafka and Flink at the Kubernetes and Cloud Native Meetup in Tunis. [5]

[5] https://www.meetup.com/Kubernetes-Cloud-Native-Tunisia/events/267396358/

Cheers,
Hequn