Move PartitionEvaluator and window_state structures to datafusion_expr crate
#6690
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PartitonEvaluator and window_state structures to datafusion_expr cratePartitionEvaluator and window_state structures to datafusion_expr crate
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@mustafasrepo I wonder if I can trouble you for a review of this PR? I think it is straightforward |
mustafasrepo
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Jun 21, 2023
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This PR is LGTM!. Thanks @alamb. Also it was weird to have impl WindowAggStates scattered, thanks for combining them on the way.
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Which issue does this PR close?
Part of #5781
Rationale for this change
We are in the process of allowing users to define their own window functions, and to do we plan for them to implement the
PartitionEvaluatortrait, similarly to how they implement theAccumulatortrait for aggregatesYou can see the basic idea in the RFC PR: #6617
I think this is the last "getting ready" PR and the next one will have real support for User Defined Window Functions 🤞
What changes are included in this PR?
Move
PartitionEvaluatorand related structures todatafusion_exprcrate (where the WindowUDFs will be defined)There is no new functionality, this PR just moves code around.
Are these changes tested?
Covered by existing tests
Are there any user-facing changes?
PartitionEvaluatorand related structs are now visible indatafusion_expr