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https://issues.apache.org/jira/browse/BEAM-2953?focusedWorklogId=262608&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-262608
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ASF GitHub Bot logged work on BEAM-2953:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 18/Jun/19 20:48
            Start Date: 18/Jun/19 20:48
    Worklog Time Spent: 10m 
      Work Description: stale[bot] commented on issue #6540: [BEAM-2953] 
Timeseries extensions . 
URL: https://github.com/apache/beam/pull/6540#issuecomment-503305681
 
 
   This pull request has been closed due to lack of activity. If you think that 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 262608)
    Time Spent: 4.5h  (was: 4h 20m)

> Timeseries processing extensions using state API
> ------------------------------------------------
>
>                 Key: BEAM-2953
>                 URL: https://issues.apache.org/jira/browse/BEAM-2953
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-ideas
>    Affects Versions: 2.7.0
>            Reporter: Reza ardeshir rokni
>            Priority: Minor
>          Time Spent: 4.5h
>  Remaining Estimate: 0h
>
> A general set of timeseries transforms that abstract the user from the 
> process of dealing with some of the common problems when dealing with 
> timeseries using BEAM (in stream or batch mode).
> BEAM can be used to build out some very interesting pre-processing stages for 
> time series data. Some examples that will be useful:
>  - Downsampling time series based on simple MIN, MAX, COUNT, SUM, LAST, FIRST
>  - Creating a value for each downsampled window even if no value has been 
> emitted for the specific key. 
>  - Loading the value of a downsample with the previous value (used in FX with 
> previous close being brought into current open value)
>  



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