crepererum opened a new pull request #307:
URL: https://github.com/apache/arrow-rs/pull/307
# Which issue does this PR close?
Fixes #306.
# Rationale for this change
All-NULL columns are somewhat special because they don't have min/max
values. However this shouldn't stop us from correctly calculating the null
counts.
# What changes are included in this PR?
Correctly populate null-counts from pages to columns.
# Are there any user-facing changes?
Yes, parquet files now have a correct null-count
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