UBarney commented on PR #14567:
URL: https://github.com/apache/datafusion/pull/14567#issuecomment-2658014801
@alamb Here's an example where @findepi's transformation would prune a
container, but this won't.
Given data
| col |
|-----|
| a |
| b |
| z |
And a predicate `col NOT LIKE 'const_prefix%'`
| | @UBarney's transformation
| @findepi's transformation
|
| ------------------------ |
------------------------------------------------------------------------- |
------------------------------------------------------ |
| PruningPredicate rewrite | `(col_min NOT LIKE 'const_prefix%' OR col_min
NOT LIKE 'const_prefix%')` | `col_max < 'const_prefix' OR col_min >=
'const_prefiy` |
| Substitution | `'a' NOT LIKE 'const_prefix%' OR 'z' NOT LIKE
'const_prefix%'` | '`z' < 'const_prefix' OR 'a' >= 'const_prefiy'`
|
| Evaluation | true OR true -> true
| false OR false -> false
|
| Result | **KEEPS** the container
| **PRUNES** the container
|
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