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https://issues.apache.org/jira/browse/PARQUET-1095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16258648#comment-16258648
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ASF GitHub Bot commented on PARQUET-1095:
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cpcloud commented on issue #403: PARQUET-1095: [C++] Read and write Arrow
decimal values
URL: https://github.com/apache/parquet-cpp/pull/403#issuecomment-345555398
@wesm I have one more change, which removes the loop from `BytesToInteger`
and uses integer arithmetic operations only, even for byte sizes that are not
powers of two.
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> [C++] Read and write Arrow decimal values
> -----------------------------------------
>
> Key: PARQUET-1095
> URL: https://issues.apache.org/jira/browse/PARQUET-1095
> Project: Parquet
> Issue Type: New Feature
> Components: parquet-cpp
> Reporter: Wes McKinney
> Assignee: Phillip Cloud
> Fix For: cpp-1.4.0
>
>
> We now have 16-byte decimal values in Arrow which have been validated against
> the Java implementation. We need to be able to read and write these to
> Parquet format.
> To make these values readable by Impala or some other Parquet readers may
> require some work. It expects the storage size to match the decimal precision
> exactly. So in parquet-cpp we will need to write the correct non-zero bytes
> into a FIXED_LEN_BYTE_ARRAY of the appropriate size.
> We should validate this against Java Parquet implementations
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