Trait ExprVisitor

source

pub trait ExprVisitor {
Show 13 methods    // Provided methods
    fn visit_expr(&mut self, expr: &ExprImpl) { ... }
    fn visit_function_call(&mut self, func_call: &FunctionCall) { ... }
    fn visit_function_call_with_lambda(
        &mut self,
        func_call: &FunctionCallWithLambda,
    ) { ... }
    fn visit_agg_call(&mut self, agg_call: &AggCall) { ... }
    fn visit_parameter(&mut self, _: &Parameter) { ... }
    fn visit_literal(&mut self, _: &Literal) { ... }
    fn visit_input_ref(&mut self, _: &InputRef) { ... }
    fn visit_subquery(&mut self, _: &Subquery) { ... }
    fn visit_correlated_input_ref(&mut self, _: &CorrelatedInputRef) { ... }
    fn visit_table_function(&mut self, func_call: &TableFunction) { ... }
    fn visit_window_function(&mut self, func_call: &WindowFunction) { ... }
    fn visit_user_defined_function(&mut self, func_call: &UserDefinedFunction) { ... }
    fn visit_now(&mut self, _: &Now) { ... }
}

Expand description

Traverse an expression tree.

Each method of the trait is a hook that can be overridden to customize the behavior when traversing the corresponding type of node. By default, every method recursively visits the subtree.

Note: The default implementation for visit_subquery is a no-op, i.e., expressions inside subqueries are not traversed.