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Posted to issues@flink.apache.org by "Fabian Hueske (JIRA)" <ji...@apache.org> on 2017/07/14 09:43:00 UTC
[jira] [Created] (FLINK-7193) Update all OVER window
ProcessFunction implementations to use SortedQueueState
Fabian Hueske created FLINK-7193:
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Summary: Update all OVER window ProcessFunction implementations to use SortedQueueState
Key: FLINK-7193
URL: https://issues.apache.org/jira/browse/FLINK-7193
Project: Flink
Issue Type: Improvement
Components: Table API & SQL
Affects Versions: 1.3.1, 1.4.0
Reporter: Fabian Hueske
Most OVER windows are implemented as {{ProcessFunction}} with {{MapState}} which is keyed on a timestamp. The algorithms are implemented in a way that they can leverage a sorted traversal over the timestamp keys but fall back to sorting if the traversed keys are not sorted.
The {{RocksDBStateBackend}} provides sorted iterators.
FLINK-6219 proposes a {{SortedQueueState}} that guarantees that values can be read from a sorted list. Once FLINK-6219 is resolved an a {{SortedQueueState}} is available, the OVER window implementations should be updated to use the new state type instead of {{MapState}}.
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