reduce restriction of JOIN
Open
dsl
improvement
P3
sql
- Dominant language
- Java
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Description
ATM streaming-streaming JOIN is acceptable only when \`triggersOncePerWindow(windowingStrategy)`. With PaneInfo exposed by UDF, we should allow JOIN with multiple triggers as developers can filter out what they want now.
Imported from Jira [BEAM-5204](https://issues.apache.org/jira/browse/BEAM-5204). Original Jira may contain additional context.
Reported by: mingmxu.
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