risingwave_common/row/
compacted_row.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 bytes::Bytes;
16use risingwave_common_estimate_size::EstimateSize;
17
18use super::{OwnedRow, Row, RowDeserializer};
19use crate::types::DataType;
20use crate::util::value_encoding;
21
22/// `CompactedRow` is used in streaming executors' cache, which takes less memory than `Vec<Datum>`.
23/// Executors need to serialize Row into `CompactedRow` before writing into cache.
24#[derive(Clone, Debug, Default, PartialEq, Eq, Hash, EstimateSize)]
25pub struct CompactedRow {
26    pub row: Bytes,
27}
28
29impl CompactedRow {
30    /// Create a new [`CompactedRow`] from given bytes. Caller must ensure the bytes are in valid
31    /// value-encoding row format.
32    pub fn new(value_encoding_bytes: Bytes) -> Self {
33        Self {
34            row: value_encoding_bytes,
35        }
36    }
37
38    /// Deserialize [`CompactedRow`] into [`OwnedRow`] with given types.
39    pub fn deserialize(&self, data_types: &[DataType]) -> value_encoding::Result<OwnedRow> {
40        RowDeserializer::new(data_types).deserialize(self.row.as_ref())
41    }
42}
43
44impl<R: Row> From<R> for CompactedRow {
45    fn from(row: R) -> Self {
46        Self {
47            row: row.value_serialize_bytes(),
48        }
49    }
50}
risingwave_common/row/compacted_row.rs

risingwave_common/row/
compacted_row.rs
