Fabian Hueske created FLINK-7996:
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Summary: Add support for (left.time = right.time) predicates to
window join.
Key: FLINK-7996
URL: https://issues.apache.org/jira/browse/FLINK-7996
Project: Flink
Issue Type: Sub-task
Components: Table API & SQL
Affects Versions: 1.4.0
Reporter: Fabian Hueske
Priority: Critical
Fix For: 1.4.0
A common operation is to join the result of two window aggregations on the same
timestamp.
However, window joins do not support equality predicates on time attributes
such as {{left.time = right.time}} but require two range predicates such as
{{left.time >= right.time AND left.time <= right.time}}.
This can be fixed in the translation code (the operator does not have to be
touched).
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