Implement stringer interface

error.go

@@ -14,7 +14,7 @@ type Error struct {
 	Number     int32
 	State      uint8
 	Class      uint8
-	Message    string
+	Message    Message
 	ServerName string
 	ProcName   string
 	LineNo     int32
@@ -23,8 +23,14 @@ type Error struct {
 	All []Error
 }
 
+type Message string
+
 func (e Error) Error() string {
-	return "mssql: " + e.Message
+	return "mssql: " + e.Message.String()
+}
+
+func (m Message) String() string {
+	return string(m)
 }
 
 // SQLErrorNumber returns the SQL Server error number.
@@ -41,7 +47,7 @@ func (e Error) SQLErrorClass() uint8 {
 }
 
 func (e Error) SQLErrorMessage() string {
-	return e.Message
+	return e.Message.String()
 }
 
 func (e Error) SQLErrorServerName() string {

token.go

@@ -601,7 +601,7 @@ func parseError72(r *tdsBuffer) (res Error) {
 	res.Number = r.int32()
 	res.State = r.byte()
 	res.Class = r.byte()
-	res.Message = r.UsVarChar()
+	res.Message = Message(r.UsVarChar())
 	res.ServerName = r.BVarChar()
 	res.ProcName = r.BVarChar()
 	res.LineNo = r.int32()
@@ -615,7 +615,7 @@ func parseInfo(r *tdsBuffer) (res Error) {
 	res.Number = r.int32()
 	res.State = r.byte()
 	res.Class = r.byte()
-	res.Message = r.UsVarChar()
+	res.Message = Message(r.UsVarChar())
 	res.ServerName = r.BVarChar()
 	res.ProcName = r.BVarChar()
 	res.LineNo = r.int32()
@@ -773,7 +773,7 @@ func processSingleResponse(ctx context.Context, sess *tdsSession, ch chan tokenS
 			}
 			errs = append(errs, err)
 			if sess.logFlags&logErrors != 0 {
-				sess.logger.Log(ctx, msdsn.LogErrors, err.Message)
+				sess.logger.Log(ctx, msdsn.LogErrors, err.Message.String())
 			}
 			if outs.msgq != nil {
 				_ = sqlexp.ReturnMessageEnqueue(ctx, outs.msgq, sqlexp.MsgError{Error: err})
@@ -784,7 +784,7 @@ func processSingleResponse(ctx context.Context, sess *tdsSession, ch chan tokenS
 				sess.logger.Log(ctx, msdsn.LogDebug, fmt.Sprintf("got INFO %d %s", info.Number, info.Message))
 			}
 			if sess.logFlags&logMessages != 0 {
-				sess.logger.Log(ctx, msdsn.LogMessages, info.Message)
+				sess.logger.Log(ctx, msdsn.LogMessages, info.Message.String())
 			}
 			if outs.msgq != nil {
 				_ = sqlexp.ReturnMessageEnqueue(ctx, outs.msgq, sqlexp.MsgNotice{Message: info.Message})