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[Feature](Nereids) Data structure of comparison predicate
1. The data structure of the comparison expression 2. Refactored the inheritance and implementation relationship of tree node ``` +-- ---- ---- ---+- ---- ---- ---- ---+- ---- ----- ---- ----TreeNode-----------------+ | | | | | | | | | v v v v Abstract Tree Node Leaf Node Unary Node Binary Node +-------- ---------+ | | | | (children) | | | v v v v v Leaf Expression Unary Expression Binary Expression +------Expression----+ Plan Node | | | | | | | | | | v v | | +- ---- ---- -----> Comparison Predicate Named Expr +---- -------+ | | v v | +- -- --- --- --- --- --- --- --- --- --- --- --- --- ---> Alias Expr Slot ^ | | | | +---- --- ---- ------ ---- ------- ------ ------- --- ------ ------ ----- ---- ----- ----- ---+ ```
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fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/BinaryPredicate.java
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