risingwave_frontend/optimizer/plan_node/
batch_project.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 pretty_xmlish::XmlNode;
16use risingwave_pb::batch_plan::ProjectNode;
17use risingwave_pb::batch_plan::plan_node::NodeBody;
18use risingwave_pb::expr::ExprNode;
19
20use super::batch::prelude::*;
21use super::utils::{Distill, childless_record};
22use super::{
23    BatchPlanRef as PlanRef, ExprRewritable, PlanBase, PlanTreeNodeUnary, ToBatchPb,
24    ToDistributedBatch, generic,
25};
26use crate::error::Result;
27use crate::expr::{Expr, ExprImpl, ExprRewriter, ExprVisitor};
28use crate::optimizer::plan_node::ToLocalBatch;
29use crate::optimizer::plan_node::expr_visitable::ExprVisitable;
30use crate::utils::ColIndexMappingRewriteExt;
31
32/// `BatchProject` implements [`super::LogicalProject`] to evaluate specified expressions on input
33/// rows
34#[derive(Debug, Clone, PartialEq, Eq, Hash)]
35pub struct BatchProject {
36    pub base: PlanBase<Batch>,
37    core: generic::Project<PlanRef>,
38}
39
40impl BatchProject {
41    pub fn new(core: generic::Project<PlanRef>) -> Self {
42        let distribution = core
43            .i2o_col_mapping()
44            .rewrite_provided_distribution(core.input.distribution());
45        let order = core
46            .i2o_col_mapping()
47            .rewrite_provided_order(core.input.order());
48
49        let base = PlanBase::new_batch_with_core(&core, distribution, order);
50        BatchProject { base, core }
51    }
52
53    pub fn core(&self) -> &generic::Project<PlanRef> {
54        &self.core
55    }
56
57    pub fn exprs(&self) -> &Vec<ExprImpl> {
58        &self.core.exprs
59    }
60}
61
62impl Distill for BatchProject {
63    fn distill<'a>(&self) -> XmlNode<'a> {
64        childless_record("BatchProject", self.core.fields_pretty(self.schema()))
65    }
66}
67
68impl PlanTreeNodeUnary<Batch> for BatchProject {
69    fn input(&self) -> PlanRef {
70        self.core.input.clone()
71    }
72
73    fn clone_with_input(&self, input: PlanRef) -> Self {
74        let mut core = self.core.clone();
75        core.input = input;
76        Self::new(core)
77    }
78}
79
80impl_plan_tree_node_for_unary! { Batch, BatchProject }
81
82impl ToDistributedBatch for BatchProject {
83    fn to_distributed(&self) -> Result<PlanRef> {
84        let new_input = self.input().to_distributed()?;
85        Ok(self.clone_with_input(new_input).into())
86    }
87}
88
89impl ToBatchPb for BatchProject {
90    fn to_batch_prost_body(&self) -> NodeBody {
91        let select_list = self
92            .core
93            .exprs
94            .iter()
95            .map(|expr| expr.to_expr_proto())
96            .collect::<Vec<ExprNode>>();
97        NodeBody::Project(ProjectNode { select_list })
98    }
99}
100
101impl ToLocalBatch for BatchProject {
102    fn to_local(&self) -> Result<PlanRef> {
103        let new_input = self.input().to_local()?;
104        Ok(self.clone_with_input(new_input).into())
105    }
106}
107
108impl ExprRewritable<Batch> for BatchProject {
109    fn has_rewritable_expr(&self) -> bool {
110        true
111    }
112
113    fn rewrite_exprs(&self, r: &mut dyn ExprRewriter) -> PlanRef {
114        let mut core = self.core.clone();
115        core.rewrite_exprs(r);
116        Self::new(core).into()
117    }
118}
119
120impl ExprVisitable for BatchProject {
121    fn visit_exprs(&self, v: &mut dyn ExprVisitor) {
122        self.core.visit_exprs(v);
123    }
124}
risingwave_frontend/optimizer/plan_node/batch_project.rs

risingwave_frontend/optimizer/plan_node/
batch_project.rs
