risingwave_frontend/optimizer/plan_node/
batch_expand.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 itertools::Itertools;
16use risingwave_pb::batch_plan::ExpandNode;
17use risingwave_pb::batch_plan::expand_node::Subset;
18use risingwave_pb::batch_plan::plan_node::NodeBody;
19
20use super::batch::prelude::*;
21use super::utils::impl_distill_by_unit;
22use super::{BatchPlanRef as PlanRef, ExprRewritable, generic};
23use crate::error::Result;
24use crate::optimizer::plan_node::expr_visitable::ExprVisitable;
25use crate::optimizer::plan_node::{
26    PlanBase, PlanTreeNodeUnary, ToBatchPb, ToDistributedBatch, ToLocalBatch,
27};
28use crate::optimizer::property::{Distribution, Order};
29
30#[derive(Debug, Clone, PartialEq, Eq, Hash)]
31pub struct BatchExpand {
32    pub base: PlanBase<Batch>,
33    core: generic::Expand<PlanRef>,
34}
35
36impl BatchExpand {
37    pub fn new(core: generic::Expand<PlanRef>) -> Self {
38        let dist = match core.input.distribution() {
39            Distribution::Single => Distribution::Single,
40            Distribution::SomeShard
41            | Distribution::HashShard(_)
42            | Distribution::UpstreamHashShard(_, _) => Distribution::SomeShard,
43            Distribution::Broadcast => unreachable!(),
44        };
45        let base = PlanBase::new_batch_with_core(&core, dist, Order::any());
46        BatchExpand { base, core }
47    }
48
49    pub fn column_subsets(&self) -> &[Vec<usize>] {
50        &self.core.column_subsets
51    }
52}
53
54impl_distill_by_unit!(BatchExpand, core, "BatchExpand");
55
56impl PlanTreeNodeUnary<Batch> for BatchExpand {
57    fn input(&self) -> PlanRef {
58        self.core.input.clone()
59    }
60
61    fn clone_with_input(&self, input: PlanRef) -> Self {
62        let mut core = self.core.clone();
63        core.input = input;
64        Self::new(core)
65    }
66}
67
68impl_plan_tree_node_for_unary! { Batch, BatchExpand }
69
70impl ToDistributedBatch for BatchExpand {
71    fn to_distributed(&self) -> Result<PlanRef> {
72        let new_input = self.input().to_distributed()?;
73        Ok(self.clone_with_input(new_input).into())
74    }
75}
76
77impl ToBatchPb for BatchExpand {
78    fn to_batch_prost_body(&self) -> NodeBody {
79        NodeBody::Expand(ExpandNode {
80            column_subsets: self
81                .column_subsets()
82                .iter()
83                .map(|subset| subset_to_protobuf(subset))
84                .collect_vec(),
85        })
86    }
87}
88
89fn subset_to_protobuf(subset: &[usize]) -> Subset {
90    let column_indices = subset.iter().map(|key| *key as u32).collect_vec();
91    Subset { column_indices }
92}
93
94impl ToLocalBatch for BatchExpand {
95    fn to_local(&self) -> Result<PlanRef> {
96        let new_input = self.input().to_local()?;
97        Ok(self.clone_with_input(new_input).into())
98    }
99}
100
101impl ExprRewritable<Batch> for BatchExpand {}
102
103impl ExprVisitable for BatchExpand {}
risingwave_frontend/optimizer/plan_node/batch_expand.rs

risingwave_frontend/optimizer/plan_node/
batch_expand.rs
