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strict.rs
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strict.rs
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// Copyright 2023 RisingWave Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use async_trait::async_trait;
use risingwave_common::array::{ArrayRef, DataChunk};
use risingwave_common::row::OwnedRow;
use risingwave_common::types::{DataType, Datum};
use crate::error::Result;
use crate::expr::{Expression, ValueImpl};
use crate::ExprError;
/// A wrapper of [`Expression`] that only keeps the first error if multiple errors are returned.
pub(crate) struct Strict<E> {
inner: E,
}
impl<E> std::fmt::Debug for Strict<E>
where
E: std::fmt::Debug,
{
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Strict")
.field("inner", &self.inner)
.finish()
}
}
impl<E> Strict<E>
where
E: Expression,
{
pub fn new(inner: E) -> Self {
Self { inner }
}
}
#[async_trait]
impl<E> Expression for Strict<E>
where
E: Expression,
{
fn return_type(&self) -> DataType {
self.inner.return_type()
}
async fn eval(&self, input: &DataChunk) -> Result<ArrayRef> {
match self.inner.eval(input).await {
Err(ExprError::Multiple(_, errors)) => Err(errors.first()),
res => res,
}
}
async fn eval_v2(&self, input: &DataChunk) -> Result<ValueImpl> {
match self.inner.eval_v2(input).await {
Err(ExprError::Multiple(_, errors)) => Err(errors.first()),
res => res,
}
}
async fn eval_row(&self, input: &OwnedRow) -> Result<Datum> {
self.inner.eval_row(input).await
}
fn eval_const(&self) -> Result<Datum> {
self.inner.eval_const()
}
fn input_ref_index(&self) -> Option<usize> {
self.inner.input_ref_index()
}
}