sqlx_core_oldapi/postgres/message/
bind.rs

1use crate::io::Encode;
2use crate::postgres::io::PgBufMutExt;
3use crate::postgres::types::Oid;
4use crate::postgres::PgValueFormat;
5
6#[derive(Debug)]
7pub struct Bind<'a> {
8    /// The ID of the destination portal (`None` selects the unnamed portal).
9    pub portal: Option<Oid>,
10
11    /// The id of the source prepared statement.
12    pub statement: Oid,
13
14    /// The parameter format codes. Each must presently be zero (text) or one (binary).
15    ///
16    /// There can be zero to indicate that there are no parameters or that the parameters all use the
17    /// default format (text); or one, in which case the specified format code is applied to all
18    /// parameters; or it can equal the actual number of parameters.
19    pub formats: &'a [PgValueFormat],
20
21    /// The number of parameters.
22    pub num_params: i16,
23
24    /// The value of each parameter, in the indicated format.
25    pub params: &'a [u8],
26
27    /// The result-column format codes. Each must presently be zero (text) or one (binary).
28    ///
29    /// There can be zero to indicate that there are no result columns or that the
30    /// result columns should all use the default format (text); or one, in which
31    /// case the specified format code is applied to all result columns (if any);
32    /// or it can equal the actual number of result columns of the query.
33    pub result_formats: &'a [PgValueFormat],
34}
35
36impl Encode<'_> for Bind<'_> {
37    fn encode_with(&self, buf: &mut Vec<u8>, _: ()) {
38        buf.push(b'B');
39
40        buf.put_length_prefixed(|buf| {
41            buf.put_portal_name(self.portal);
42
43            buf.put_statement_name(self.statement);
44
45            buf.extend(&(self.formats.len() as i16).to_be_bytes());
46
47            for &format in self.formats {
48                buf.extend(&(format as i16).to_be_bytes());
49            }
50
51            buf.extend(&self.num_params.to_be_bytes());
52
53            buf.extend(self.params);
54
55            if let Ok(len) = i16::try_from(self.result_formats.len()) {
56                buf.extend(&len.to_be_bytes());
57                for &format in self.result_formats {
58                    buf.extend(&(format as i16).to_be_bytes());
59                }
60            }
61        });
62    }
63}
64
65// TODO: Unit Test Bind
66// TODO: Benchmark Bind
sqlx_core_oldapi/postgres/message/bind.rs

sqlx_core_oldapi/postgres/message/
bind.rs
