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Posted to issues@flink.apache.org by "sunjincheng (JIRA)" <ji...@apache.org> on 2017/03/28 10:02:41 UTC

[jira] [Created] (FLINK-6204) Improve Event-Time OVER ROWS BETWEEN UNBOUNDED PRECEDING aggregation to SQL

sunjincheng created FLINK-6204:
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             Summary: Improve Event-Time OVER ROWS BETWEEN UNBOUNDED PRECEDING aggregation to SQL
                 Key: FLINK-6204
                 URL: https://issues.apache.org/jira/browse/FLINK-6204
             Project: Flink
          Issue Type: Bug
          Components: Table API & SQL
            Reporter: sunjincheng
            Assignee: sunjincheng


Currently `event time OVER ROWS BETWEEN UNBOUNDED PRECEDING aggregation to SQL`  implementation  class: ` UnboundedEventTimeOverProcessFunction` use data size uncontrollable memory data structures`sortedTimestamps: util.LinkedList [Long] cache data timestamps and sort timestamps. IMO,It's not a good way, because in the production environment there are millions of window data pre millisecond in our application scenario.So, I want to improve it. Welcome anyone to give me feedback.
What do you think? [~fhueske] and [~Yuhong_kyo]



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