diff --git a/session-dealer/mysql/config.go b/session-dealer/mysql/config.go
index 95c67ec..23fae06 100644
--- a/session-dealer/mysql/config.go
+++ b/session-dealer/mysql/config.go
@@ -7,7 +7,7 @@ import (
 )
 
 var (
-	uselessSQLPattern = regexp.MustCompile(`(?i)^\s*(select 1|select @@version_comment limit 1|commit|begin)`)
+	uselessSQLPattern = regexp.MustCompile(`(?i)^\s*(select @@version_comment limit 1)`)
 	ddlPatern = regexp.MustCompile(`(?i)^\s*(create|alter|drop)`)
 )
 
diff --git a/session-dealer/mysql/session.go b/session-dealer/mysql/session.go
index f07c954..eed1289 100644
--- a/session-dealer/mysql/session.go
+++ b/session-dealer/mysql/session.go
@@ -345,12 +345,10 @@ func (ms *MysqlSession) GenerateQueryPiece() (qp model.QueryPiece) {
 func filterQueryPieceBySQL(mqp *model.PooledMysqlQueryPiece, querySQL []byte) (model.QueryPiece) {
 	if mqp == nil || querySQL == nil {
 		return nil
+
+	} else if (uselessSQLPattern.Match(querySQL)) {
+		return nil
 	}
-	/*
-	 else if (uselessSQLPattern.Match(querySQL)) {
-			return nil
-		}
-	*/
 
 	if ddlPatern.Match(querySQL) {
 		mqp.SetNeedSyncSend(true)