risingwave_expr_impl/scalar/
array_min_max.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 risingwave_common::array::*;
16use risingwave_common::types::{DefaultOrdered, ScalarRefImpl};
17use risingwave_expr::function;
18
19#[function("array_min(anyarray) -> any")]
20pub fn array_min(list: ListRef<'_>) -> Option<ScalarRefImpl<'_>> {
21    let min_value = list.iter().flatten().map(DefaultOrdered).min();
22    min_value.map(|v| v.0)
23}
24
25#[function("array_max(anyarray) -> any")]
26pub fn array_max(list: ListRef<'_>) -> Option<ScalarRefImpl<'_>> {
27    let max_value = list.iter().flatten().map(DefaultOrdered).max();
28    max_value.map(|v| v.0)
29}