risingwave_frontend/optimizer/plan_node/
stream.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 super::generic::PhysicalPlanRef;
16use crate::optimizer::property::{MonotonicityMap, WatermarkColumns};
17
18/// A subtrait of [`PhysicalPlanRef`] for stream plans.
19///
20/// Due to the lack of refactoring, all plan nodes currently implement this trait
21/// through [`super::PlanBase`]. One may still use this trait as a bound for
22/// accessing a stream plan, in contrast to [`GenericPlanRef`] or
23/// [`PhysicalPlanRef`].
24///
25/// [`GenericPlanRef`]: super::generic::GenericPlanRef
26#[auto_impl::auto_impl(&)]
27pub trait StreamPlanRef: PhysicalPlanRef {
28    fn append_only(&self) -> bool;
29    fn emit_on_window_close(&self) -> bool;
30    fn watermark_columns(&self) -> &WatermarkColumns;
31    fn columns_monotonicity(&self) -> &MonotonicityMap;
32}
33
34/// Prelude for stream plan nodes.
35pub mod prelude {
36    pub use super::super::Stream;
37    pub use super::super::generic::{GenericPlanRef, PhysicalPlanRef};
38    pub use super::StreamPlanRef;
39}
risingwave_frontend/optimizer/plan_node/stream.rs

risingwave_frontend/optimizer/plan_node/
stream.rs
