kevinjqliu commented on PR #1010:
URL: 
https://github.com/apache/datafusion-python/pull/1010#issuecomment-2643727227

   Thank you @timsaucer i verified locally that that indeed resolved the issue 
for `test_string_functions` 
   
   I also pushed up a fix for `test_relational_expr` (which was originally 
changed 
[here](https://github.com/apache/datafusion-python/commit/3c662010f9d133cda65749b119a1b1731edbe4e5#diff-a4447eee51f8b342595263292ff35d53615d3049170d293d642a911656b78fb7L144)
 but now im reverting that change) 
   
   There's one last issue with 
[`test_execution_plan`](https://github.com/apache/datafusion-python/blob/93ac6a820353b3ddea014be1eddad8bd004b0fce/python/tests/test_dataframe.py#L730-L764),
 `stream = ctx.execute(plan, 0)` produce no data.
   I think it has to do with the plan itself. I've printed out the plans here.
   
   Im not familiar with this, could you help take a look?
   
   ```
   (Pdb) print(plan.display())
   AggregateExec: mode=FinalPartitioned, gby=[c1@0 as c1], aggr=[sum(test.c2)]
   
   (Pdb) print(plan.display_indent())
   AggregateExec: mode=FinalPartitioned, gby=[c1@0 as c1], aggr=[sum(test.c2)]
     CoalesceBatchesExec: target_batch_size=8192
       RepartitionExec: partitioning=Hash([c1@0], 8), input_partitions=8
         AggregateExec: mode=Partial, gby=[c1@0 as c1], aggr=[sum(test.c2)]
           RepartitionExec: partitioning=RoundRobinBatch(8), input_partitions=1
             CsvExec: file_groups={1 group: 
[[Users/kevinliu/repos/datafusion-python/testing/data/csv/aggregate_test_100.csv]]},
 projection=[c1, c2], has_header=true
   ```


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