risingwave_frontend/binder/relation/
cte_ref.rs

1// Copyright 2025 RisingWave Labs
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use crate::binder::statement::RewriteExprsRecursive;
16use crate::binder::{BoundSetExpr, ShareId};
17
18/// A CTE reference, currently only used in the back reference of recursive CTE.
19/// For the non-recursive one, see [`BoundShare`](super::BoundShare).
20#[derive(Debug, Clone)]
21pub struct BoundBackCteRef {
22    pub(crate) share_id: ShareId,
23    pub(crate) base: BoundSetExpr,
24}
25
26impl RewriteExprsRecursive for BoundBackCteRef {
27    fn rewrite_exprs_recursive(&mut self, _rewriter: &mut impl crate::expr::ExprRewriter) {}
28}