[GitHub] [arrow] jorisvandenbossche commented on issue #34437: [R] Use FetchNode and OrderByNode

["jorisvandenbossche (via GitHub)" <gi...@apache.org>]

jorisvandenbossche commented on issue #34437:
URL: https://github.com/apache/arrow/issues/34437#issuecomment-1480719738

   I was just testing the FetchNode in python, and at least for a Table source, I seem to get deterministic behaviour:
    
   ```python
   import pyarrow as pa
   from pyarrow._acero import TableSourceNodeOptions, FetchNodeOptions, Declaration
   
   table = pa.table({'a': np.arange(10_000_000)})
   table = pa.Table.from_batches(table.to_batches(max_chunksize=1_000_000))
   
   for _ in range(100):
       decl = Declaration.from_sequence([
           Declaration("table_source", TableSourceNodeOptions(table)), 
           Declaration("fetch", FetchNodeOptions(0, 5))
       ])
   
       assert decl.to_table()['a'].to_pylist() == [0, 1, 2, 3, 4]
   ```


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