xuanqing94 commented on issue #9325:
URL: https://github.com/apache/arrow/issues/9325#issuecomment-791152745


   @joeyac Sorry to bring it up again... but I am deeply confused about this 
line of code:
   `auto column_struct = 
std::static_pointer_cast<arrow::StructArray>(table->GetColumnByName("column")->chunk(0));
   `
   since GetColumnByName returns a shared_ptr to ChunkedArray, would accessing 
only the chunk(0) returns incomplete data? 
   like if the data file is huge and truncated (from the document I couldn't 
really get the idea). 
   Could you say a bit more about this? Thanks a lot!


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