Merge pull request #169 from go-sql-driver/warnings

errors: Export MySQLWarning

Author: julienschmidt

errors.go

@@ -26,7 +26,7 @@ var (
 	errPktTooLarge = errors.New("Packet for query is too large. You can change this value on the server by adjusting the 'max_allowed_packet' variable.")
 )
 
-// error type which represents a single MySQL error
+// MySQLError is an error type which represents a single MySQL error
 type MySQLError struct {
 	Number  uint16
 	Message string
@@ -36,22 +36,29 @@ func (me *MySQLError) Error() string {
 	return fmt.Sprintf("Error %d: %s", me.Number, me.Message)
 }
 
-// error type which represents a group of one or more MySQL warnings
-type MySQLWarnings []mysqlWarning
+// MySQLWarnings is an error type which represents a group of one or more MySQL
+// warnings
+type MySQLWarnings []MysqlWarning
 
 func (mws MySQLWarnings) Error() string {
 	var msg string
 	for i, warning := range mws {
 		if i > 0 {
 			msg += "\r\n"
 		}
-		msg += fmt.Sprintf("%s %s: %s", warning.Level, warning.Code, warning.Message)
+		msg += fmt.Sprintf(
+			"%s %s: %s",
+			warning.Level,
+			warning.Code,
+			warning.Message,
+		)
 	}
 	return msg
 }
 
-// error type which represents a single MySQL warning
-type mysqlWarning struct {
+// MysqlWarning is an error type which represents a single MySQL warning.
+// Warnings are returned in groups only. See MySQLWarnings
+type MysqlWarning struct {
 	Level   string
 	Code    string
 	Message string
@@ -66,15 +73,15 @@ func (mc *mysqlConn) getWarnings() (err error) {
 	var warnings = MySQLWarnings{}
 	var values = make([]driver.Value, 3)
 
-	var warning mysqlWarning
+	var warning MysqlWarning
 	var raw []byte
 	var ok bool
 
 	for {
 		err = rows.Next(values)
 		switch err {
 		case nil:
-			warning = mysqlWarning{}
+			warning = MysqlWarning{}
 
 			if raw, ok = values[0].([]byte); ok {
 				warning.Level = string(raw)