findepi commented on PR #15110:
URL: https://github.com/apache/datafusion/pull/15110#issuecomment-2713266973
> @findepi I wonder if you have some time to double check the correctness of
this optimization (distributing a cast)
unwrapping cast is not an easy feat. The current implementation isn't
exactly correct, as it conflates different strings which cast back to the same
number:
```sql
CREATE OR REPLACE TABLE t AS SELECT arrow_cast('123', 'Int64') a;
-- correctly finds the row
SELECT * FROM t WHERE cast(a AS string) = '123';
-- incorrectly also finds the row
SELECT * FROM t WHERE cast(a AS string) = '0123';
```
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