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  1. Apache Arrow
  2. ARROW-3762

[C++] Parquet arrow::Table reads error when overflowing capacity of BinaryArray

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      1. When reading a parquet file with binary data > 2 GiB, we get an ArrowIOError due to it not creating chunked arrays. Reading each row group individually and then concatenating the tables works, however.

       

      import pandas as pd
      import pyarrow as pa
      import pyarrow.parquet as pq
      
      
      x = pa.array(list('1' * 2**30))
      
      demo = 'demo.parquet'
      
      
      def scenario():
          t = pa.Table.from_arrays([x], ['x'])
          writer = pq.ParquetWriter(demo, t.schema)
          for i in range(2):
              writer.write_table(t)
          writer.close()
      
          pf = pq.ParquetFile(demo)
      
          # pyarrow.lib.ArrowIOError: Arrow error: Invalid: BinaryArray cannot contain more than 2147483646 bytes, have 2147483647
          t2 = pf.read()
      
          # Works, but note, there are 32 row groups, not 2 as suggested by:
          # https://arrow.apache.org/docs/python/parquet.html#finer-grained-reading-and-writing
          tables = [pf.read_row_group(i) for i in range(pf.num_row_groups)]
          t3 = pa.concat_tables(tables)
      
      scenario()
      

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            bkietz Ben Kietzman
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