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Posted to dev@parquet.apache.org by "Gabor Szadovszky (Jira)" <ji...@apache.org> on 2020/01/16 13:32:00 UTC
[jira] [Resolved] (PARQUET-1765) Invalid filteredRowCount in
InternalParquetRecordReader
[ https://issues.apache.org/jira/browse/PARQUET-1765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gabor Szadovszky resolved PARQUET-1765.
---------------------------------------
Resolution: Fixed
> Invalid filteredRowCount in InternalParquetRecordReader
> -------------------------------------------------------
>
> Key: PARQUET-1765
> URL: https://issues.apache.org/jira/browse/PARQUET-1765
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Affects Versions: 1.11.0
> Reporter: Gabor Szadovszky
> Assignee: Gabor Szadovszky
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.11.1
>
>
> The [record count|https://github.com/apache/parquet-mr/blob/apache-parquet-1.11.0/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/InternalParquetRecordReader.java#L185] is retrieved before setting the [projection schema|https://github.com/apache/parquet-mr/blob/apache-parquet-1.11.0/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/InternalParquetRecordReader.java#L188] so the value might be invalid if the projection impacts the filter.
> In normal cases it does not cause any issue because the record filter will filter correctly only that we are filtering the records one-by-one instead of dropping the related pages.
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