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Posted to dev@parquet.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/04/29 09:34:00 UTC
[jira] [Commented] (PARQUET-1285) [Java] SchemaConverter should not
convert from TimeUnit.SECOND AND TimeUnit.NANOSECOND of Arrow
[ https://issues.apache.org/jira/browse/PARQUET-1285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16457960#comment-16457960 ]
ASF GitHub Bot commented on PARQUET-1285:
-----------------------------------------
masayuki038 opened a new pull request #469: PARQUET-1285: [Java] SchemaConverter should not convert from TimeUnit.SECOND and TimeUnit.NANOSECOND of Arrow
URL: https://github.com/apache/parquet-mr/pull/469
Arrow's 'Time' definition is below:
```
{ "name" : "time", "unit" : "SECOND|MILLISECOND|MICROSECOND|NANOSECOND", "bitWidth": /* integer: 32 or 64 */ }
```
http://arrow.apache.org/docs/metadata.html
But Parquet only supports 'TIME_MILLIS' and 'TIME_MICROS'.
https://github.com/Apache/parquet-format/blob/master/LogicalTypes.md
Therefore SchemaConverter should not convert from TimeUnit.SECOND and TimeUnit.NANOSECOND of Arrow to Parquet.
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> [Java] SchemaConverter should not convert from TimeUnit.SECOND AND TimeUnit.NANOSECOND of Arrow
> -----------------------------------------------------------------------------------------------
>
> Key: PARQUET-1285
> URL: https://issues.apache.org/jira/browse/PARQUET-1285
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Reporter: Masayuki Takahashi
> Priority: Minor
>
> Arrow's 'Time' definition is below:
> {code:java}
> { "name" : "time", "unit" : "SECOND|MILLISECOND|MICROSECOND|NANOSECOND", "bitWidth": /* integer: 32 or 64 */ }{code}
> [http://arrow.apache.org/docs/metadata.html]
>
> But Parquet only supports 'TIME_MILLIS' and 'TIME_MICROS'.
> [https://github.com/Apache/parquet-format/blob/master/LogicalTypes.md]
> Therefore SchemaConverter should not convert from TimeUnit.SECOND AND TimeUnit.NANOSECOND of Arrow to Parquet.
>
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