MachaelLee opened a new pull request, #4567:
URL: https://github.com/apache/arrow-rs/pull/4567

   # Which issue does this PR close?
   
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   Closes #.
   
   # Rationale for this change
    
   Currently page offset index is set to `none` when page column index is 
`none`, which cause error when init meta data with pre load page index. The 
error info is bellow:
   ```
   decode page indexes for meta data, file_path:0/14/489.sst, err:Parquet 
error: failed to build page indexes in metadata, err:Parquet error: missing 
offset index.
   ```
   The relevant code is: 
https://github.com/apache/arrow-rs/blob/master/parquet/src/arrow/async_reader/metadata.rs#L198
   
   # What changes are included in this PR?
   
   * Build page offset index even if page column index is none
   
   # Are there any user-facing changes?
   
   
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   <!---
   If there are any breaking changes to public APIs, please add the `breaking 
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