Uploaded image for project: 'Spark'
  1. Spark
  2. SPARK-21590

Structured Streaming window start time should support negative values to adjust time zone

    XMLWordPrintableJSON

    Details

      Description

      I want to calculate (unique) daily access count using structured streaming (2.2.0).
      Now strut streaming' s window with 1 day duration starts at
      00:00:00 UTC and ends at 23:59:59 UTC each day, but my local timezone is CST (UTC + 8 hours) and I
      want date boundaries to be 00:00:00 CST (that is 00:00:00 UTC - 8).

      In Flink I can set the window offset to -8 hours to make it, but here in struct streaming if I set the start time (same as the offset in Flink) to -8 or any other negative values, I will get the following error:

      Exception in thread "main" org.apache.spark.sql.AnalysisException: cannot resolve 'timewindow(timestamp, 86400000000, 86400000000, -28800000000)' due to data type mismatch: The start time (-28800000000) must be greater than or equal to 0.;;
      

      because the time window checks the input parameters to guarantee each value is greater than or equal to 0.

      So I'm thinking about whether we can remove the limit that the start time cannot be negative?

        Attachments

          Activity

            People

            • Assignee:
              KevinZwx Kevin Zhang
              Reporter:
              KevinZwx Kevin Zhang
            • Votes:
              0 Vote for this issue
              Watchers:
              7 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: