sqlx-core-oldapi 0.6.52

Core of SQLx, the rust SQL toolkit. Not intended to be used directly.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

use bytes::Bytes;

use crate::error::Error;
use crate::io::Decode;

#[derive(Debug)]
#[repr(u8)]
pub enum TransactionStatus {
    /// Not in a transaction block.
    Idle = b'I',

    /// In a transaction block.
    Transaction = b'T',

    /// In a _failed_ transaction block. Queries will be rejected until block is ended.
    Error = b'E',
}

#[derive(Debug)]
pub struct ReadyForQuery {
    pub transaction_status: TransactionStatus,
}

impl Decode<'_> for ReadyForQuery {
    fn decode_with(buf: Bytes, _: ()) -> Result<Self, Error> {
        let status = match buf[0] {
            b'I' => TransactionStatus::Idle,
            b'T' => TransactionStatus::Transaction,
            b'E' => TransactionStatus::Error,

            status => {
                return Err(err_protocol!(
                    "unknown transaction status: {:?}",
                    status as char
                ));
            }
        };

        Ok(Self {
            transaction_status: status,
        })
    }
}

#[test]
fn test_decode_ready_for_query() -> Result<(), Error> {
    const DATA: &[u8] = b"E";

    let m = ReadyForQuery::decode(Bytes::from_static(DATA))?;

    assert!(matches!(m.transaction_status, TransactionStatus::Error));

    Ok(())
}