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https://issues.apache.org/jira/browse/SPARK-34859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Li Xian updated SPARK-34859:
----------------------------
Attachment:
part-00000-bee08cae-04cd-491c-9602-4c66791af3d0-c000.snappy.parquet
> 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
> Attachments:
> part-00000-bee08cae-04cd-491c-9602-4c66791af3d0-c000.snappy.parquet
>
>
> 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.
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