jiangzhx opened a new pull request, #5435:
URL: https://github.com/apache/arrow-datafusion/pull/5435
# Rationale for this change
add mean result to describe method to keep same with polars.
# What changes are included in this PR?
calc mean result for all columns , exclude column datatype is
`Binary,Boolean,Timestamp(_, _)`
`<img width="1396" alt="image"
src="https://user-images.githubusercontent.com/494507/222045731-54b70f1f-33de-4300-b4ce-fd257da69711.png";>
# Are there any user-facing changes?
returned by describe method adds more information。
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![https://user-images.githubusercontent.com/494507/222045731-54b70f1f-33de-4300-b4ce-fd257da69711.png"](https://user-images.githubusercontent.com/494507/222045731-54b70f1f-33de-4300-b4ce-fd257da69711.png"){kind=link}