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Posted to issues@flink.apache.org by "Sun Shun (Jira)" <ji...@apache.org> on 2022/10/06 09:42:00 UTC

[jira] [Commented] (FLINK-29527) Make unknownFieldsIndices work for single ParquetReader

    [ https://issues.apache.org/jira/browse/FLINK-29527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17613400#comment-17613400 ] 

Sun Shun commented on FLINK-29527:
----------------------------------

 Please assign this issue to me, thanks, I already fix it.

> Make unknownFieldsIndices work for single ParquetReader
> -------------------------------------------------------
>
>                 Key: FLINK-29527
>                 URL: https://issues.apache.org/jira/browse/FLINK-29527
>             Project: Flink
>          Issue Type: Bug
>          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
>    Affects Versions: 1.16.0
>            Reporter: Sun Shun
>            Priority: Major
>              Labels: pull-request-available
>
> Currently, from the improvement FLINK-23715, Flink use a collection named `unknownFieldsIndices` to track the nonexistent fields, and it is kept inside the `ParquetVectorizedInputFormat`, and applied to all parquet files under given path.
> However, some fields may only be nonexistent in some of the historical parquet files, while exist in latest ones. And based on `unknownFieldsIndices`, flink will always skip these fields, even thought they are existing in the later parquets.
> As a result, the value of these fields will become empty when they are nonexistent in some historical parquet files.



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