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From "Lars Volker (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IMPALA-5748) Switch all Parquet column readers to the batched interface
Date Tue, 01 Aug 2017 01:09:00 GMT
Lars Volker created IMPALA-5748:
-----------------------------------

             Summary: Switch all Parquet column readers to the batched interface
                 Key: IMPALA-5748
                 URL: https://issues.apache.org/jira/browse/IMPALA-5748
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
    Affects Versions: Impala 2.10.0
            Reporter: Lars Volker
            Assignee: Lars Volker
            Priority: Critical


As a prerequisite for IMPALA-5185, we should switch the CollectionColumnReader to materialize
collections using the batched interface. Afterwards we can remove the single-value interface.
We should also try to remove the calls from {{ParquetColumnReader}} to {{HdfsParquetScanner::AssembleCollection()}}.



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