| Class | Description | 
|---|---|
| ExtractFunctionsFromJoinConditionRule | Factors out function expressions from each comparison function or similarity function in join condition by assigning them to a variables, and replacing the function expressions with references to those variables. | 
| InlineNestedVariablesRule | Modifies the InlineVariablesRule to also process nested plans. | 
| MoveFreeVariableOperatorOutOfSubplanRule | The rule searches for operators that can be moved outside the subplan. | 
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