zhztheplayer opened a new pull request, #4888:
URL: https://github.com/apache/incubator-gluten/pull/4888
1. Break `TransformPreOverrides` into 3 individual sub rules:
- FilterTransformRule()
- RegularTransformRule()
- AggregationTransformRule()
The rules are still in `TransformPreOverrides` as its sub rules.
2. `RegularTransformRule`: This rule implements a single node as Gluten's
transformer without checking it's children. While the other two rules
conditionally implements filter and aggregate by checking its children. In
future we'd put corresponding logics to validation phase, to gain some
flexibility during implementation phase, to choose whether to transform one
single node or not.
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