Method transform_data

datafusion/common/src/tree_node.rs:711–719

Applies a fallible transforming `f` to the data of this [`Transformed`] object. The returned `Transformed` object has the `transformed` flag set if either `self` or the return value of `f` have the `transformed` flag set.

(
        self,
        f: F,
    )

    /// The returned `Transformed` object has the `transformed` flag set if either
    /// `self` or the return value of `f` have the `transformed` flag set.
    pub fn transform_data<U, F: FnOnce(T) -> Result<Transformed<U>>>(
        self,
        f: F,
    ) -> Result<Transformed<U>> {
        f(self.data).map(|mut t| {
            t.transformed |= self.transformed;
            t
        })
    }

    /// Maps the [`Transformed`] object to the result of the given `f` depending on the
    /// current [`TreeNodeRecursion`] value and the fact that `f` is changing the current