godfrey he created FLINK-18651:
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Summary: implicitly cast the time attribute to regular TIMESTAMP
type in regular join
Key: FLINK-18651
URL: https://issues.apache.org/jira/browse/FLINK-18651
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: godfrey he
Currently, regular join does not accept rowtime attribute field as input, and
requires users manually cast the time attribute as regular timestamp. Because
time attribute will be out-of-order after regular join, and then we can't do
window aggregate based on the time attribute.
We can improve it that the planner can implicitly cast the time attribute to
regular TIMESTAMP type, and throws exception there is an operator (after join)
depended on time attribute, like window aggregate.
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