工作流任务日志排序时间字段添加，升级脚本如下：
-- mysql      
      ALTER TABLE ACT_HI_ACTINST
 ADD COLUMN (START_TIME_LONG  bigint ); 
       ALTER TABLE ACT_HI_ACTINST
 ADD COLUMN (END_TIME_LONG  bigint ); 
 
       ALTER TABLE ACT_HI_TASKINST
 ADD COLUMN (START_TIME_LONG  bigint ); 
       ALTER TABLE ACT_HI_TASKINST
 ADD COLUMN (END_TIME_LONG  bigint ); 
 
 -- oracle
       ALTER TABLE ACT_HI_ACTINST
 ADD   (START_TIME_LONG  NUMBER(19) ); 
       ALTER TABLE ACT_HI_ACTINST
 ADD   (END_TIME_LONG  NUMBER(19) ); 
 
       ALTER TABLE ACT_HI_TASKINST
 ADD  (START_TIME_LONG  NUMBER(19) ); 
       ALTER TABLE ACT_HI_TASKINST
 ADD   (END_TIME_LONG  NUMBER(19) );