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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/06/19 15:35:00 UTC

[jira] [Resolved] (IMPALA-3052) Reorder Parquet Column readers such that slots with probe filters are read first

     [ https://issues.apache.org/jira/browse/IMPALA-3052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3052.
-----------------------------------
    Resolution: Duplicate

> 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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