risingwave_expr_impl/scalar/
md5.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 std::fmt::Write;
16
17use risingwave_expr::function;
18
19#[function("md5(varchar) -> varchar")]
20pub fn md5(s: &str, writer: &mut impl Write) {
21    write!(writer, "{:x}", ::md5::compute(s)).unwrap();
22}
23
24#[function("md5(bytea) -> varchar")]
25pub fn md5_from_bytea(s: &[u8], writer: &mut impl Write) {
26    writer
27        .write_str(&::hex::encode(::md5::compute(s).0))
28        .unwrap();
29}
30
31#[cfg(test)]
32mod tests {
33    use super::*;
34
35    #[test]
36    fn test_md5() {
37        let cases = [
38            ("hello world", "5eb63bbbe01eeed093cb22bb8f5acdc3"),
39            ("hello RUST", "917b821a0a5f23ab0cfdb36056d2eb9d"),
40            (
41                "abcdefghijklmnopqrstuvwxyz",
42                "c3fcd3d76192e4007dfb496cca67e13b",
43            ),
44        ];
45
46        for (s, expected) in cases {
47            let mut writer = String::new();
48            md5(s, &mut writer);
49            assert_eq!(writer, expected);
50        }
51    }
52
53    #[test]
54    fn test_md5_bytea() {
55        let cases = [
56            ("hello world".as_bytes(), "5eb63bbbe01eeed093cb22bb8f5acdc3"),
57            ("hello RUST".as_bytes(), "917b821a0a5f23ab0cfdb36056d2eb9d"),
58            (
59                "abcdefghijklmnopqrstuvwxyz".as_bytes(),
60                "c3fcd3d76192e4007dfb496cca67e13b",
61            ),
62        ];
63
64        for (s, expected) in cases {
65            let mut writer = String::new();
66            md5_from_bytea(s, &mut writer);
67            assert_eq!(writer, expected);
68        }
69    }
70}
risingwave_expr_impl/scalar/md5.rs

risingwave_expr_impl/scalar/
md5.rs
