risingwave_frontend/optimizer/plan_visitor/
iceberg_scan_detector.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 crate::optimizer::plan_node::LogicalIcebergScan;
16use crate::optimizer::plan_visitor::{LogicalPlanVisitor, Merge};
17use crate::optimizer::{LogicalPlanRef, PlanVisitor};
18
19/// Visitor to check if Logical Plan contains any `LogicalIcebergScan` node.
20#[derive(Debug, Clone, Copy)]
21struct IcebergScanDetector;
22
23impl LogicalPlanVisitor for IcebergScanDetector {
24    type DefaultBehavior = Merge<fn(bool, bool) -> bool>;
25    type Result = bool;
26
27    fn default_behavior() -> Self::DefaultBehavior {
28        Merge(|a, b| a | b)
29    }
30
31    fn visit_logical_iceberg_scan(&mut self, _scan: &LogicalIcebergScan) -> Self::Result {
32        true
33    }
34}
35
36#[easy_ext::ext(LogicalIcebergScanExt)]
37pub impl LogicalPlanRef {
38    /// Returns `true` if the plan contains any `LogicalIcebergScan` node.
39    fn contains_iceberg_scan(&self) -> bool {
40        IcebergScanDetector.visit(self.clone())
41    }
42}