[
https://issues.apache.org/jira/browse/SPARK-34859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17308435#comment-17308435
]
Yuming Wang commented on SPARK-34859:
-------------------------------------
[~lxian2] Thank you for reporting this issue. Would you like work on this?
> Vectorized parquet reader needs synchronization among pages for column index
> ----------------------------------------------------------------------------
>
> Key: SPARK-34859
> URL: https://issues.apache.org/jira/browse/SPARK-34859
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Li Xian
> Priority: Major
>
> the current implementation has a problem. the pages returned by
> `readNextFilteredRowGroup` may not be aligned, some columns may have more
> rows than others.
> Parquet is using `org.apache.parquet.column.impl.SynchronizingColumnReader`
> with `rowIndexes` to make sure that rows are aligned.
> Currently `VectorizedParquetRecordReader` doesn't have such synchronizing
> among pages from different columns. Using `readNextFilteredRowGroup` may
> result in incorrect result.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
