diff --git a/logger.go b/logger.go
index c4c17bbb..29aa7632 100644
--- a/logger.go
+++ b/logger.go
@@ -1,7 +1,9 @@
 package xorm
 
 import (
+	"fmt"
 	"io"
+	"io/ioutil"
 	"log"
 )
 
@@ -14,35 +16,46 @@ type ILogger interface {
 }
 
 type SimpleLogger struct {
-	logger *log.Logger
+	DEBUG *log.Logger
+	ERR   *log.Logger
+	INFO  *log.Logger
+	WARN  *log.Logger
 }
 
 func NewSimpleLogger(out io.Writer) *SimpleLogger {
 	return &SimpleLogger{
-		logger: log.New(out, "[xorm] ", log.Ldate|log.Lmicroseconds)}
+		DEBUG: log.New(ioutil.Discard, "[xorm] [debug] ", log.Ldate|log.Lmicroseconds),
+		ERR:   log.New(ioutil.Discard, "[xorm] [error] ", log.Ldate|log.Lmicroseconds),
+		INFO:  log.New(ioutil.Discard, "[xorm] [info]  ", log.Ldate|log.Lmicroseconds),
+		WARN:  log.New(ioutil.Discard, "[xorm] [warn]  ", log.Ldate|log.Lmicroseconds),
+	}
 }
 
 func NewSimpleLogger2(out io.Writer, prefix string, flag int) *SimpleLogger {
 	return &SimpleLogger{
-		logger: log.New(out, prefix, flag)}
+		DEBUG: log.New(ioutil.Discard, fmt.Sprintf("%s [debug] ", prefix), log.Ldate|log.Lmicroseconds),
+		ERR:   log.New(ioutil.Discard, fmt.Sprintf("%s [error] ", prefix), log.Ldate|log.Lmicroseconds),
+		INFO:  log.New(ioutil.Discard, fmt.Sprintf("%s [info]  ", prefix), log.Ldate|log.Lmicroseconds),
+		WARN:  log.New(ioutil.Discard, fmt.Sprintf("%s [warn]  ", prefix), log.Ldate|log.Lmicroseconds),
+	}
 }
 
 func (s *SimpleLogger) Debug(m string) (err error) {
-	s.logger.Println("[debug]", m)
+	s.DEBUG.Println(m)
 	return
 }
 
 func (s *SimpleLogger) Err(m string) (err error) {
-	s.logger.Println("[error]", m)
+	s.ERR.Println(m)
 	return
 }
 
 func (s *SimpleLogger) Info(m string) (err error) {
-	s.logger.Println("[info]", m)
+	s.INFO.Println(m)
 	return
 }
 
 func (s *SimpleLogger) Warning(m string) (err error) {
-	s.logger.Println("[warning]", m)
+	s.WARN.Println(m)
 	return
 }