Github user bowenli86 commented on the issue:
https://github.com/apache/flink/pull/4963
Hi @yunfan123 Thanks for the feedback, and I agree with you.
Well, here's the problem: Flink seems to be using the
StringAppendTestOperator as merge operator from RocksDB, which added a ','
between values. But I didn't find how a java class for
StringAppendTestOperator.
Shall we mimic StringAppendTestOperator and concatenate the values with ','
ourselves? Do you have any more suggestions?---
