Function transform

src/sql/src/plan/transform_ast.rs:31–42

(scx: &StatementContext, node: &mut N)

use crate::{ORDINALITY_COL_NAME, normalize};

pub(crate) fn transform<N>(scx: &StatementContext, node: &mut N) -> Result<(), PlanError>
where
    N: for<'a> VisitMutNode<'a, Aug>,
{
    let mut func_rewriter = FuncRewriter::new(scx);
    node.visit_mut(&mut func_rewriter);
    func_rewriter.status?;

    let mut desugarer = Desugarer::new(scx);
    node.visit_mut(&mut desugarer);
    desugarer.status
}

// Transforms various functions to forms that are more easily handled by the
// planner.