Method transform

src/transform/src/lib.rs:1035–1047

Optimizes the supplied relation expression in place, using available arrangements. This method should only be called with non-empty `indexes` when optimizing a dataflow, as the optimizations may lock in the use of arrangements that may cease to exist.

(
        &self,
        relation: &mut MirRelationExpr,
        args: &mut TransformCtx,
    )

    /// This method should only be called with non-empty `indexes` when optimizing a dataflow,
    /// as the optimizations may lock in the use of arrangements that may cease to exist.
    fn transform(
        &self,
        relation: &mut MirRelationExpr,
        args: &mut TransformCtx,
    ) -> Result<(), TransformError> {
        args.update_last_hash(relation);

        for transform in self.transforms.iter() {
            transform.transform(relation, args)?;
        }

        Ok(())
    }
}