64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
package pgx
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/jackc/pgx/v5/internal/pgio"
|
|
"github.com/jackc/pgx/v5/pgtype"
|
|
)
|
|
|
|
// PostgreSQL format codes
|
|
const (
|
|
TextFormatCode = 0
|
|
BinaryFormatCode = 1
|
|
)
|
|
|
|
func convertSimpleArgument(m *pgtype.Map, arg any) (any, error) {
|
|
buf, err := m.Encode(0, TextFormatCode, arg, []byte{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if buf == nil {
|
|
return nil, nil
|
|
}
|
|
return string(buf), nil
|
|
}
|
|
|
|
func encodeCopyValue(m *pgtype.Map, buf []byte, oid uint32, arg any) ([]byte, error) {
|
|
sp := len(buf)
|
|
buf = pgio.AppendInt32(buf, -1)
|
|
argBuf, err := m.Encode(oid, BinaryFormatCode, arg, buf)
|
|
if err != nil {
|
|
if argBuf2, err2 := tryScanStringCopyValueThenEncode(m, buf, oid, arg); err2 == nil {
|
|
argBuf = argBuf2
|
|
} else {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if argBuf != nil {
|
|
buf = argBuf
|
|
pgio.SetInt32(buf[sp:], int32(len(buf[sp:])-4))
|
|
}
|
|
return buf, nil
|
|
}
|
|
|
|
func tryScanStringCopyValueThenEncode(m *pgtype.Map, buf []byte, oid uint32, arg any) ([]byte, error) {
|
|
s, ok := arg.(string)
|
|
if !ok {
|
|
textBuf, err := m.Encode(oid, TextFormatCode, arg, nil)
|
|
if err != nil {
|
|
return nil, errors.New("not a string and cannot be encoded as text")
|
|
}
|
|
s = string(textBuf)
|
|
}
|
|
|
|
var v any
|
|
err := m.Scan(oid, TextFormatCode, []byte(s), &v)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return m.Encode(oid, BinaryFormatCode, v, buf)
|
|
}
|