aihuaxu commented on PR #455:
URL: https://github.com/apache/arrow-go/pull/455#issuecomment-3190566954

   > @aihuaxu It appears all of the parquet files with Decimal values that you 
regenerated are inconsistent with the test cases. The values in the parquet 
files don't match the expected values in the variant (for example, containing 
`123456789` instead of `1234567890` and some other rounding differences. The 
original files had the correct values, but were just missing the Variant 
logical type.) Can you fix them please?
   
   For decimal values, the changes are expected to align with the spec - 
original 1234567890 should be treated as decimal8 rather than decimal4 since 
the values with 1~9 precision is stored as decimal4.
   
   
   > Also some cases haven't been given the new notes/descriptions, such as the 
cases which test for a missing value column (the spec wording still does not 
allow for the value column to be omitted)
   I didn't update for these test cases since missing value column can be 
omitted to indicate the value is null (I would like to clarify in the spec 
https://github.com/apache/parquet-format/pull/512/).
   
   Please take another look.  I consolidate the files into one place. Sorry 
that I didn't notice that. 


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