[jira] [Commented] (PARQUET-1964) Properly handle missing/null filter

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PARQUET-1964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17267833#comment-17267833 ] 

ASF GitHub Bot commented on PARQUET-1964:
-----------------------------------------

wangyum closed pull request #855:
URL: https://github.com/apache/parquet-mr/pull/855


   


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> Properly handle missing/null filter
> -----------------------------------
>
>                 Key: PARQUET-1964
>                 URL: https://issues.apache.org/jira/browse/PARQUET-1964
>             Project: Parquet
>          Issue Type: Improvement
>            Reporter: Yuming Wang
>            Assignee: Gabor Szadovszky
>            Priority: Major
>
> How to reproduce this issue:
> {code:scala}
> val hadoopInputFile = HadoopInputFile.fromPath(new Path("/path/to/parquet/000.snappy.parquet"), new Configuration())
> val reader = ParquetFileReader.open(hadoopInputFile)
> val recordCount = reader.getFilteredRecordCount
> reader.close()
> {code}
> Output:
> {noformat}
> java.lang.NullPointerException was thrown.
> java.lang.NullPointerException
> 	at org.apache.parquet.internal.filter2.columnindex.ColumnIndexFilter.calculateRowRanges(ColumnIndexFilter.java:81)
> 	at org.apache.parquet.hadoop.ParquetFileReader.getRowRanges(ParquetFileReader.java:961)
> 	at org.apache.parquet.hadoop.ParquetFileReader.getFilteredRecordCount(ParquetFileReader.java:766)
> {noformat}
> UPDATE: This is not only about the potential NPE if a {{null}} filter is set but to handle the missing/null filter in a better performing way. (Currently a NOOP filter implementation is used by default if no filter is set which requires to load the related data for column index/bloom filter even if no actual filtering will occur.)



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