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https://issues.apache.org/jira/browse/FLINK-24921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17444387#comment-17444387
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Fabian Paul commented on FLINK-24921:
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[~echauchot] thanks for opening this ticket although I might miss the overall
picture `FileSourceSplit` is a public class and will probably always stay that
way because it allows users to access file information in the serializers.
Why do you think it should be an internal class?
> FileSourceSplit should not be visible in the user API in
> ParquetColumnarRowInputFormat
> --------------------------------------------------------------------------------------
>
> Key: FLINK-24921
> URL: https://issues.apache.org/jira/browse/FLINK-24921
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / FileSystem
> Reporter: Etienne Chauchot
> Priority: Major
>
> _FileSourceSplit_ is an internal class that should not be visible in the user
> API like
> [here|https://github.com/apache/flink/blob/6f2d8fe3007464343c5312e27612be448b415148/flink-formats/flink-parquet/src/test/java/org/apache/flink/formats/parquet/ParquetColumnarRowInputFormatTest.java#L235].
> The fact that _FileSourceSplit_ surfaces in the API also influences the user
> to do a raw use of the parametrized class like
> [here|https://github.com/apache/flink/blob/6f2d8fe3007464343c5312e27612be448b415148/flink-formats/flink-parquet/src/test/java/org/apache/flink/formats/parquet/ParquetColumnarRowInputFormatTest.java#L407]
> It could be better to make parquet format a not parametrized class as it is
> done for hive connector
> _class HiveInputFormat implements BulkFormat<RowData, HiveSourceSplit>_
> rather than
> _class ParquetColumnarRowInputFormat<SplitT extends FileSourceSplit>_
> _extends ParquetVectorizedInputFormat<RowData, SplitT>_
>
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