tustvold commented on issue #5325:
URL: https://github.com/apache/arrow-rs/issues/5325#issuecomment-1908585263

   Aah, parquet itself is inconsistent :sob: Ok so the next step I think would 
be to document that the Decimal struct stores data big-endian encoded, and to 
highlight that if using i32 or i64 as the physical type, parquet uses little 
endian encoding including in statistics and bloom filters (as they're 
[documented](https://github.com/apache/parquet-format/blob/master/src/main/thrift/parquet.thrift#L273)
 to mirror the PLAIN encoding).


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