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Posted to issues@iceberg.apache.org by "kakavenkat (via GitHub)" <gi...@apache.org> on 2024/12/20 21:32:55 UTC
[I] SparkValue converter Timestamp Issue [iceberg]
kakavenkat opened a new issue, #11840:
URL: https://github.com/apache/iceberg/issues/11840
### Apache Iceberg version
1.7.1 (latest release)
### Query engine
PrestoDB
### Please describe the bug 🐞
While converting Spark data into Iceberg records, timestamps and dates are being converted into long values, which is confusing for users. This behavior makes it difficult to interpret the actual timestamp or date values in the records. Additionally, some engines, such as Presto, are unable to understand the timestamp value in long format, making it unreadable. Users expect these fields to retain their original formats or be represented in a more user-friendly way.
### Willingness to contribute
- [X] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from the Iceberg community
- [ ] I cannot contribute a fix for this bug at this time
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Re: [I] SparkValue converter Timestamp Issue [iceberg]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #11840:
URL: https://github.com/apache/iceberg/issues/11840#issuecomment-3076324992
This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'
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Re: [I] SparkValue converter Timestamp Issue [iceberg]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] closed issue #11840: SparkValue converter Timestamp Issue
URL: https://github.com/apache/iceberg/issues/11840
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Re: [I] SparkValue converter Timestamp Issue [iceberg]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #11840:
URL: https://github.com/apache/iceberg/issues/11840#issuecomment-3025901884
This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.
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Re: [I] SparkValue converter Timestamp Issue [iceberg]
Posted by "kakavenkat (via GitHub)" <gi...@apache.org>.
kakavenkat commented on issue #11840:
URL: https://github.com/apache/iceberg/issues/11840#issuecomment-2557788328
https://github.com/apache/iceberg/pull/11841
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Re: [I] SparkValue converter Timestamp Issue [iceberg]
Posted by "RussellSpitzer (via GitHub)" <gi...@apache.org>.
RussellSpitzer commented on issue #11840:
URL: https://github.com/apache/iceberg/issues/11840#issuecomment-2568288012
I am not sure I understand the issue here.
Iceberg defines Timestamp as microseconds from epoch. When we actually store it in files it is up to that file format to define how that type is serialized. In this case of Parquet, this is also defined as an Int64.
If Presto has a bug decoding this that is indicative of a far deeper issue with the Presto read code for parquet files.
I'm also unsure how changing the underlying representation would help since it's up to the reader to decide how to display the value to users since native parquet files are not readable by humans (at least not me)
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