Details
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Bug
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Status: Resolved
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P3
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Resolution: Fixed
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None
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None
Description
Programming Guide
Global windowing:
If your input PCollection uses the default global windowing, the default behavior is to return a PCollection containing one item. That item’s value comes from the accumulator in the combine function that you specified when applying Combine. For example, the Beam provided sum combine function returns a zero value (the sum of an empty input), while the min combine function returns a maximal or infinite value.
while the max combine function returns a maximal or infinite value.