增加悲观锁选项

session.go

@@ -29,6 +29,7 @@ type Session struct {
 	IsCommitedOrRollbacked bool
 	TransType              string
 	IsAutoClose            bool
+	LockRead               bool //set sad lock for accepting ro read dirty data
 
 	// Automatically reset the statement after operations that execute a SQL
 	// query such as Count(), Find(), Get(), ...
@@ -1001,6 +1002,10 @@ func (session *Session) Get(bean interface{}) (bool, error) {
 
 	if session.Statement.RawSQL == "" {
 		sqlStr, args = session.Statement.genGetSql(bean)
+		//加入悲观锁 FOR oracle & pg & mysql
+		if session.LockRead {
+			sqlStr += " FOR UPDATE "
+		}
 	} else {
 		sqlStr = session.Statement.RawSQL
 		args = session.Statement.RawParams

statement.go

@@ -1241,8 +1241,6 @@ func (statement *Statement) genSelectSql(columnStr string) string {
 			a = fmt.Sprintf("SELECT %v FROM (SELECT %v,ROWNUM RN FROM (%v) at WHERE ROWNUM <= %d) aat WHERE RN > %d", columnStr, columnStr, a, statement.Start+statement.LimitN, statement.Start)
 		}
 	}
-	//在事务中强制性加入排他锁,不开事务则不起作用 FOR oracle & pg & mysql
-	a += "  FOR UPDATE "
 	return a
 }