增加websocket支持

vendor/github.com/jackc/pgx/v5/pgproto3/row_description.go

@@ -4,8 +4,6 @@ import (
 	"bytes"
 	"encoding/binary"
 	"encoding/json"
-	"errors"
-	"math"
 
 	"github.com/jackc/pgx/v5/internal/pgio"
 )
@@ -101,12 +99,11 @@ func (dst *RowDescription) Decode(src []byte) error {
 }
 
 // Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
-func (src *RowDescription) Encode(dst []byte) ([]byte, error) {
-	dst, sp := beginMessage(dst, 'T')
+func (src *RowDescription) Encode(dst []byte) []byte {
+	dst = append(dst, 'T')
+	sp := len(dst)
+	dst = pgio.AppendInt32(dst, -1)
 
-	if len(src.Fields) > math.MaxUint16 {
-		return nil, errors.New("too many fields")
-	}
 	dst = pgio.AppendUint16(dst, uint16(len(src.Fields)))
 	for _, fd := range src.Fields {
 		dst = append(dst, fd.Name...)
@@ -120,7 +117,9 @@ func (src *RowDescription) Encode(dst []byte) ([]byte, error) {
 		dst = pgio.AppendInt16(dst, fd.Format)
 	}
 
-	return finishMessage(dst, sp)
+	pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
+
+	return dst
 }
 
 // MarshalJSON implements encoding/json.Marshaler.