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https://issues.apache.org/jira/browse/IOTDB-4929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuan Tian reassigned IOTDB-4929:
--------------------------------
Assignee: liaolanyu (was: Yuan Tian)
> [UDF] the sliding time window stopped when the keys in PointCollector are not
> unique
> ------------------------------------------------------------------------------------
>
> Key: IOTDB-4929
> URL: https://issues.apache.org/jira/browse/IOTDB-4929
> Project: Apache IoTDB
> Issue Type: Bug
> Affects Versions: 0.14.0-SNAPSHOT
> Reporter: changxue
> Assignee: liaolanyu
> Priority: Major
> Attachments: image-2022-11-14-17-53-31-312.png,
> image-2022-11-14-17-54-27-906.png
>
>
> the sliding time window stopped when the keys in PointCollector are not
> unique, I guess it ignores the exceptions of the source codes in transform
> method.
> reproduction:
> {code:java}
> create function sum_sec as
> "com.timecho.udf.normal.TestSlidingTimeWindowAccessStrategy";CREATE
> TIMESERIES root.udf.d1.s1 WITH DATATYPE=int64, ENCODING=PLAIN;
> CREATE TIMESERIES root.udf.d1.s2 WITH DATATYPE=int64, ENCODING=PLAIN;
> CREATE TIMESERIES root.udf.d1.s3 WITH DATATYPE=int32, ENCODING=PLAIN;
> CREATE TIMESERIES root.udf.d1.ss1 WITH DATATYPE=int64, ENCODING=PLAIN;
>
> insert into root.udf.d1 (time, s1, s2) values (1, 1, 2),(2, 3, 4),(3, null,
> 6),(4, 7, 8),(5, 9, 10),(6, 11, null),(7, 13, 14),(8, 15, 16),(12, 17,
> 18),(20, 19, 20);
> -- notice this
> select sum_sec(s1,'interval'=3,'step'=1) from root.udf.d1; {code}
>
> !image-2022-11-14-17-53-31-312.png!
> !image-2022-11-14-17-54-27-906.png!
> see the screen shot upstairs：
> 因为时间为3的值是null, 所以，在滑动到第三行时，它取的时间列是第四行，而下一次滑动，它真正滑动到第四个值时，它的时间列还是4, 冲突了。
> 问题：
> 1. 该抛异常就应该抛出来，不然静默处理，调试时，都不知道发生了什么
> 2. PointCollector 如果要求timestamp唯一，那么得给出一个contains或者hasKey方法，不然很容易出现撞车。
>
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