kou commented on issue #23877:
URL: https://github.com/apache/arrow/issues/23877#issuecomment-1570912603
We can build it by the following change:
```diff
diff --git a/Formula/apache-arrow.rb b/Formula/apache-arrow.rb
index 72cf9c72820..cc882b78a83 100644
--- a/Formula/apache-arrow.rb
+++ b/Formula/apache-arrow.rb
@@ -66,6 +66,7 @@ class ApacheArrow < Formula
-DARROW_WITH_BROTLI=ON
-DARROW_WITH_UTF8PROC=ON
-DARROW_INSTALL_NAME_RPATH=OFF
+ -DPARQUET_BUILD_EXECUTABLES=ON
]
args << "-DARROW_MIMALLOC=ON" unless Hardware::CPU.arm?
```
Could you send a pull request to Homebrew?
BTW, we can check original size and compressed size by the following Ruby
script:
```ruby
#!/usr/bin/env ruby
require "parquet"
ARGV.each do |path|
puts path
Arrow::MemoryMappedInputStream.open(path) do |input|
reader = Parquet::ArrowFileReader.new(input)
metadata = reader.metadata
metadata.n_row_groups.times.each do |i|
row_group = metadata.get_row_group(i)
row_group.n_columns.times.each do |j|
column_chunk = row_group.get_column_chunk(j)
p [i, j, column_chunk.total_size, column_chunk.total_compressed_size]
end
end
end
end
```
They are inconvenient API (we want to use `metadata.each_row_group` instead
of `metadata.n_row_groups.times...`) as you see. If you're interested in
improving API, please open a new issue for it.
We can check which compression is used with C++ API but it's not exported to
Ruby yet. (We can't use `column_chunk.compression` for now.)
If you open a new issue, we can work on it.
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