blob: a5fee7cb910905169db58de2df34fca2c27572b3 (
plain) (
blame)
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
55
56
57
58
59
60
61
62
63
64
65
|
package pgproto3
import (
"bytes"
"encoding/binary"
"encoding/json"
"github.com/jackc/pgx/v5/internal/pgio"
)
type Execute struct {
Portal string
MaxRows uint32
}
// Frontend identifies this message as sendable by a PostgreSQL frontend.
func (*Execute) Frontend() {}
// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
// type identifier and 4 byte message length.
func (dst *Execute) Decode(src []byte) error {
buf := bytes.NewBuffer(src)
b, err := buf.ReadBytes(0)
if err != nil {
return err
}
dst.Portal = string(b[:len(b)-1])
if buf.Len() < 4 {
return &invalidMessageFormatErr{messageType: "Execute"}
}
dst.MaxRows = binary.BigEndian.Uint32(buf.Next(4))
return nil
}
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *Execute) Encode(dst []byte) []byte {
dst = append(dst, 'E')
sp := len(dst)
dst = pgio.AppendInt32(dst, -1)
dst = append(dst, src.Portal...)
dst = append(dst, 0)
dst = pgio.AppendUint32(dst, src.MaxRows)
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
return dst
}
// MarshalJSON implements encoding/json.Marshaler.
func (src Execute) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
Portal string
MaxRows uint32
}{
Type: "Execute",
Portal: src.Portal,
MaxRows: src.MaxRows,
})
}
|
