alamb commented on PR #23014:
URL: https://github.com/apache/datafusion/pull/23014#issuecomment-4929709591

   
   > For example, for x IN (10, 20, 30), the fast path can behave like:
   > 
   > x == 10 OR x == 20 OR x == 30
   
   in fact DataFuson does this rewrite explicitly today:
   
   ```sql
   DataFusion CLI v54.0.0
   > create table t (v int) as values (1),(2), (3), (4);
   0 row(s) fetched.
   Elapsed 0.034 seconds.
   
   > explain select * from t where v IN (10, 20, 30);
   +---------------+-------------------------------+
   | plan_type     | plan                          |
   +---------------+-------------------------------+
   | physical_plan | ┌───────────────────────────┐ |
   |               | │         FilterExec        │ |
   |               | │    --------------------   │ |
   |               | │         predicate:        │ |
   |               | │ v = 10 OR v = 20 OR v = 30│ |
   |               | └─────────────┬─────────────┘ |
   |               | ┌─────────────┴─────────────┐ |
   |               | │       DataSourceExec      │ |
   |               | │    --------------------   │ |
   |               | │         bytes: 112        │ |
   |               | │       format: memory      │ |
   |               | │          rows: 1          │ |
   |               | └───────────────────────────┘ |
   |               |                               |
   +---------------+-------------------------------+
   1 row(s) fetched.
   Elapsed 0.014 seconds.
   ```
   
   


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