ewgenius commented on PR #15820:
URL: https://github.com/apache/datafusion/pull/15820#issuecomment-2826267482

   @comphead thanks for the response.
   
   The problem we faced at Spice is that `ILIKE` expression pushed down as 
`LIKE` to the data source:
   - https://github.com/spiceai/spiceai/issues/5486
   
   I'm not entirely sure, but this particular query migh not go through SQL 
unparser so it is not affected by the bug?
   cc @phillipleblanc 
   
   ```
   ➜ datafusion-cli
   DataFusion CLI v47.0.0
   > select * from (select 'a' a) t where t.a like ('%A%');
   +---+
   | a |
   +---+
   +---+
   0 row(s) fetched.
   Elapsed 0.023 seconds.
   
   > select * from (select 'a' a) t where t.a ilike ('%A%');
   +---+
   | a |
   +---+
   | a |
   +---+
   1 row(s) fetched.
   Elapsed 0.004 seconds.
   
   > explain select * from (select 'a' a) t where t.a ilike ('%A%');
   +---------------+-------------------------------+
   | plan_type     | plan                          |
   +---------------+-------------------------------+
   | physical_plan | ┌───────────────────────────┐ |
   |               | │       ProjectionExec      │ |
   |               | │    --------------------   │ |
   |               | │          expr0: a         │ |
   |               | └─────────────┬─────────────┘ |
   |               | ┌─────────────┴─────────────┐ |
   |               | │     PlaceholderRowExec    │ |
   |               | └───────────────────────────┘ |
   |               |                               |
   +---------------+-------------------------------+
   1 row(s) fetched.
   Elapsed 0.003 seconds.
   
   > explain select * from (select 'a' a) t where t.a like ('%A%');
   +---------------+-------------------------------+
   | plan_type     | plan                          |
   +---------------+-------------------------------+
   | physical_plan | ┌───────────────────────────┐ |
   |               | │         EmptyExec         │ |
   |               | └───────────────────────────┘ |
   |               |                               |
   +---------------+-------------------------------+
   1 row(s) fetched.
   Elapsed 0.000 seconds.
   ```
   
   


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