[jira] [Created] (ARROW-8725) redundant directory walk in rust parquet datasource code

[QP Hou (Jira)]

QP Hou created ARROW-8725:
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             Summary: redundant directory walk in rust parquet datasource code
                 Key: ARROW-8725
                 URL: https://issues.apache.org/jira/browse/ARROW-8725
             Project: Apache Arrow
          Issue Type: Improvement
            Reporter: QP Hou
            Assignee: QP Hou


In the rust code base, `common::build_file_list` is called within 
`ParquetExec::try_new`, so there is no need to build the file list before 
calling `try_new`.



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