[GitHub] [arrow] wgtmac opened a new issue, #34590: [C++][ORC] Use TIMESTAMP_INSTANT instead of TIMESTAMP

["wgtmac (via GitHub)" <gi...@apache.org>]

wgtmac opened a new issue, #34590:
URL: https://github.com/apache/arrow/issues/34590

   ### Describe the enhancement requested
   
   Background: There was an effort to fix inconsistent timestamp types across different SQL-on-Hadoop engines: https://docs.google.com/document/d/1gNRww9mZJcHvUDCXklzjFEQGpefsuR_akCDfWsdE35Q 
   
   In the Apache Orc, two timestamp types are provided:
   - TIMESTAMP: timestamp type without timezone, timestamp value is stored in the writer timezone .
   - TIMESTAMP_INSTANT: timestamp type with local timezone, timestamp value is stored in the UTC timezone.
   
   arrow::TimestampType has an optional timezone field: https://github.com/apache/arrow/blob/main/cpp/src/arrow/type.h#L1385
   - If timezone is provided, values are normalized in UTC.
   - If timezone is missing, values can be in any timezone.
   
   Therefore, the type mapping should be as below:
   - orc::TIMESTAMP <=> arrow::TimestampType w/o timezone
   - orc::TIMESTAMP <=> arrow::TimestampType w/ timezone
   
   
   ### Component(s)
   
   C++


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[GitHub] [arrow] wjones127 closed issue #34590: [C++][ORC] Fix timestamp type mapping between orc and arrow

["wjones127 (via GitHub)" <gi...@apache.org>]

wjones127 closed issue #34590: [C++][ORC] Fix timestamp type mapping between orc and arrow
URL: https://github.com/apache/arrow/issues/34590


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