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https://issues.apache.org/jira/browse/FLINK-7475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16249311#comment-16249311
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ASF GitHub Bot commented on FLINK-7475:
---------------------------------------
Github user StefanRRichter commented on the issue:
https://github.com/apache/flink/pull/4963
@aljoscha IIRC there is no class for `StringAppendTESTOperator ` in the
RocksDB Java API. You can only pass a string that is used inside some factory
in the native RocksDB code to instantiate the append operator. I would also
suggest to simulate it, either "shallow" by adding commas or "deeper" by using
a dummy RocksDB instance internally to actually perform the merge and query for
the result.
> support update() in ListState
> -----------------------------
>
> Key: FLINK-7475
> URL: https://issues.apache.org/jira/browse/FLINK-7475
> Project: Flink
> Issue Type: Improvement
> Components: Core, DataStream API, State Backends, Checkpointing
> Affects Versions: 1.4.0
> Reporter: yf
> Assignee: Bowen Li
> Fix For: 1.5.0
>
>
> If I want to update the list.
> I have to do two steps:
> listState.clear()
> for (Element e : myList) {
> listState.add(e);
> }
> Why not I update the state by:
> listState.update(myList) ?
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