risingwave_frontend/optimizer/plan_node/generic/
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 std::hash::Hash;
16
17use itertools::Itertools;
18use pretty_xmlish::{Pretty, StrAssocArr};
19use risingwave_common::catalog::Schema;
20
21use super::{GenericPlanNode, GenericPlanRef, impl_distill_unit_from_fields};
22use crate::OptimizerContextRef;
23use crate::binder::ShareId;
24use crate::optimizer::plan_node::LogicalPlanRef;
25use crate::optimizer::property::FunctionalDependencySet;
26
27#[derive(Clone, Debug)]
28pub struct CteRef<PlanRef> {
29    share_id: ShareId,
30    base: PlanRef,
31}
32
33impl<PlanRef> PartialEq for CteRef<PlanRef> {
34    fn eq(&self, other: &Self) -> bool {
35        self.share_id == other.share_id
36    }
37}
38
39impl<PlanRef> Eq for CteRef<PlanRef> {}
40
41impl<PlanRef> Hash for CteRef<PlanRef> {
42    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
43        self.share_id.hash(state);
44    }
45}
46
47impl<PlanRef> CteRef<PlanRef> {
48    pub fn new(share_id: ShareId, base: PlanRef) -> Self {
49        Self { share_id, base }
50    }
51}
52
53impl CteRef<LogicalPlanRef> {
54    pub fn get_cte_ref(&self) -> Option<LogicalPlanRef> {
55        self.ctx().get_rcte_cache_plan(&self.share_id)
56    }
57}
58
59impl GenericPlanNode for CteRef<LogicalPlanRef> {
60    fn schema(&self) -> Schema {
61        if let Some(plan_ref) = self.get_cte_ref() {
62            plan_ref.schema().clone()
63        } else {
64            self.base.schema().clone()
65        }
66    }
67
68    fn stream_key(&self) -> Option<Vec<usize>> {
69        if let Some(plan_ref) = self.get_cte_ref() {
70            plan_ref
71                .stream_key()
72                .map(|s| s.iter().map(|i| i.to_owned()).collect_vec())
73        } else {
74            self.base
75                .stream_key()
76                .map(|s| s.iter().map(|i| i.to_owned()).collect_vec())
77        }
78    }
79
80    fn ctx(&self) -> OptimizerContextRef {
81        // it does not matter where the context is coming from,
82        // since we are only getting a reference.
83        self.base.ctx()
84    }
85
86    fn functional_dependency(&self) -> FunctionalDependencySet {
87        if let Some(plan_ref) = self.get_cte_ref() {
88            plan_ref.functional_dependency().clone()
89        } else {
90            self.base.functional_dependency().clone()
91        }
92    }
93}
94
95impl<PlanRef: GenericPlanRef> CteRef<PlanRef> {
96    pub fn fields_pretty<'a>(&self) -> StrAssocArr<'a> {
97        vec![("share_id", Pretty::debug(&self.share_id))]
98    }
99}
100
101impl_distill_unit_from_fields! {CteRef, GenericPlanRef}
risingwave_frontend/optimizer/plan_node/generic/cte_ref.rs

risingwave_frontend/optimizer/plan_node/generic/
cte_ref.rs
