Timo Walther created FLINK-24103:
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Summary: Create time-based LAST_VALUE / FIRST_VALUE
Key: FLINK-24103
URL: https://issues.apache.org/jira/browse/FLINK-24103
Project: Flink
Issue Type: Improvement
Components: Table SQL / Runtime
Reporter: Timo Walther
LAST_VALUE and FIRST_VALUE don't support merging. As far I can see it,
FLINK-20110 tries to solve this by using nano second timestamps internally.
However, an easier and consistent approach could be to allow a time parameter
in the signature:
{code}
LAST_VALUE(timestamp, value)
FIRST_VALUE(timestamp, value)
{code}
This allows merging based on a timestamp in HOP or SESSION windows.
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