Method fold_rel

prqlc/prqlc/src/sql/pq/gen_query.rs:131–133

(&mut self, rel: RIId)

impl PqMapper<RIId, pq::RelationExpr, rq::Transform, ()> for TransformCompiler<'_> {
    fn fold_rel(&mut self, rel: RIId) -> Result<pq::RelationExpr> {
        compile_relation_instance(rel, self.ctx)
    }

    fn fold_super(&mut self, _: rq::Transform) -> Result<()> {
        unreachable!()