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::{ExprRewritable, generic};
23use crate::error::Result;
24use crate::optimizer::PlanRef;
25use crate::optimizer::plan_node::expr_visitable::ExprVisitable;
26use crate::optimizer::plan_node::{
27    PlanBase, PlanTreeNodeUnary, ToBatchPb, ToDistributedBatch, ToLocalBatch,
28};
29use crate::optimizer::property::{Distribution, Order};
30
31#[derive(Debug, Clone, PartialEq, Eq, Hash)]
32pub struct BatchExpand {
33    pub base: PlanBase<Batch>,
34    core: generic::Expand<PlanRef>,
35}
36
37impl BatchExpand {
38    pub fn new(core: generic::Expand<PlanRef>) -> Self {
39        let dist = match core.input.distribution() {
40            Distribution::Single => Distribution::Single,
41            Distribution::SomeShard
42            | Distribution::HashShard(_)
43            | Distribution::UpstreamHashShard(_, _) => Distribution::SomeShard,
44            Distribution::Broadcast => unreachable!(),
45        };
46        let base = PlanBase::new_batch_with_core(&core, dist, Order::any());
47        BatchExpand { base, core }
48    }
49
50    pub fn column_subsets(&self) -> &[Vec<usize>] {
51        &self.core.column_subsets
52    }
53}
54
55impl_distill_by_unit!(BatchExpand, core, "BatchExpand");
56
57impl PlanTreeNodeUnary for BatchExpand {
58    fn input(&self) -> PlanRef {
59        self.core.input.clone()
60    }
61
62    fn clone_with_input(&self, input: PlanRef) -> Self {
63        let mut core = self.core.clone();
64        core.input = input;
65        Self::new(core)
66    }
67}
68
69impl_plan_tree_node_for_unary! { BatchExpand }
70
71impl ToDistributedBatch for BatchExpand {
72    fn to_distributed(&self) -> Result<PlanRef> {
73        let new_input = self.input().to_distributed()?;
74        Ok(self.clone_with_input(new_input).into())
75    }
76}
77
78impl ToBatchPb for BatchExpand {
79    fn to_batch_prost_body(&self) -> NodeBody {
80        NodeBody::Expand(ExpandNode {
81            column_subsets: self
82                .column_subsets()
83                .iter()
84                .map(|subset| subset_to_protobuf(subset))
85                .collect_vec(),
86        })
87    }
88}
89
90fn subset_to_protobuf(subset: &[usize]) -> Subset {
91    let column_indices = subset.iter().map(|key| *key as u32).collect_vec();
92    Subset { column_indices }
93}
94
95impl ToLocalBatch for BatchExpand {
96    fn to_local(&self) -> Result<PlanRef> {
97        let new_input = self.input().to_local()?;
98        Ok(self.clone_with_input(new_input).into())
99    }
100}
101
102impl ExprRewritable for BatchExpand {}
103
104impl ExprVisitable for BatchExpand {}
risingwave_frontend/optimizer/plan_node/batch_expand.rs

risingwave_frontend/optimizer/plan_node/
batch_expand.rs
