Aljoscha Krettek created FLINK-5917:
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Summary: Remove MapState.size()
Key: FLINK-5917
URL: https://issues.apache.org/jira/browse/FLINK-5917
Project: Flink
Issue Type: Improvement
Components: DataStream API
Affects Versions: 1.3.0
Reporter: Aljoscha Krettek
I'm proposing to remove {{size()}} because it is a prohibitively expensive
operation and users might not be aware of it. Instead of {{size()}} users can
use an iterator over all mappings to determine the size, when doing this they
will be aware of the fact that it is a costly operation.
Right now, {{size()}} is only costly on the RocksDB state backend but I think
with future developments on the in-memory state backend it might also become an
expensive operation there.
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