risingwave_frontend/optimizer/rule/batch/batch_iceberg_count_star.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//
15// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
16// This source code is licensed under both the GPLv2 (found in the
17// COPYING file in the root directory) and Apache 2.0 License
18// (found in the LICENSE.Apache file in the root directory).
19
20use risingwave_pb::batch_plan::iceberg_scan_node::IcebergScanType;
21
22use crate::PlanRef;
23use crate::optimizer::plan_node::{BatchIcebergScan, PlanAggCall};
24use crate::optimizer::rule::{BoxedRule, Rule};
25
26pub struct BatchIcebergCountStar {}
27
28impl Rule for BatchIcebergCountStar {
29 fn apply(&self, plan: PlanRef) -> Option<PlanRef> {
30 let agg = plan.as_batch_simple_agg()?;
31 if agg.core.group_key.is_empty()
32 && agg.agg_calls().len() == 1
33 && agg.agg_calls()[0].eq(&PlanAggCall::count_star())
34 {
35 let batch_iceberg = agg.core.input.as_batch_iceberg_scan()?;
36 if batch_iceberg.iceberg_scan_type() != IcebergScanType::DataScan {
37 return None;
38 }
39 return Some(
40 BatchIcebergScan::new_count_star_with_batch_iceberg_scan(batch_iceberg).into(),
41 );
42 }
43 None
44 }
45}
46
47impl BatchIcebergCountStar {
48 pub fn create() -> BoxedRule {
49 Box::new(BatchIcebergCountStar {})
50 }
51}