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https://issues.apache.org/jira/browse/FLINK-19449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17296775#comment-17296775
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laiyijie commented on FLINK-19449:
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Support LAG firstly is a good idea. I think LAG is a basic function. It's
important to fixed thi bug. we can store the list of value . The size of the
list is the lag's offset param. remove the first element when retract . return
the first value when get value.
> LEAD/LAG cannot work correctly in streaming mode
> ------------------------------------------------
>
> Key: FLINK-19449
> URL: https://issues.apache.org/jira/browse/FLINK-19449
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API, Table SQL / Runtime
> Affects Versions: 1.10.2, 1.11.2
> Reporter: Benchao Li
> Priority: Major
>
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