alamb opened a new issue, #5995:
URL: https://github.com/apache/arrow-datafusion/issues/5995

   ### Describe the bug
   
   Found while looking at https://github.com/apache/arrow-datafusion/issues/5942
   
   ### To Reproduce
   
   Download this file:
   
[slow_tpch_query_repro.zip](https://github.com/apache/arrow-datafusion/files/11224660/slow_tpch_query_repro.zip)
   
   
   and follow the instructions: 
   ```
   setup virtual env:
   
   python3 -m venv venv
   source venv/bin/activate
   
   pip install -r requirements.txt
   pip install --pre --upgrade duckdb
   
   # make the files:
   python generate.py
   ```
   
   Then run the query like:
   
   ```
   # Run the query using datafusion-cli:
   cd tpch_1
   datafusion-cli -f q1.txt
   ```
   Only one core is used and the query takes several seconds to complete
   
   
   ### Expected behavior
   
   I expect to see all the cores on the machine used to operate on the query
   
   ### Additional context
   
   _No response_


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