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https://issues.apache.org/jira/browse/IMPALA-3052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17107559#comment-17107559
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Tim Armstrong commented on IMPALA-3052:
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This is a special case of IMPALA-2017
> Reorder Parquet Column readers such that slots with probe filters are read
> first
> --------------------------------------------------------------------------------
>
> Key: IMPALA-3052
> URL: https://issues.apache.org/jira/browse/IMPALA-3052
> Project: IMPALA
> Issue Type: Sub-task
> Components: Backend
> Affects Versions: Impala 2.5.0
> Reporter: Mostafa Mokhtar
> Priority: Minor
> Labels: performance, runtime-filters
>
> When applying selective probe filters
> {code}HdfsParquetScanner::CreateColumnReaders{code} should order
> column_readers such that slots with selective probe filters come first, this
> should reduce the number of calls to ReadSlot.
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