日期筛选条件为空时 目前将空值带入了筛选条件中,如何设置日期筛选条件为空时不添加时间的筛选条件
${if(len(start_date)=0,"","and bpa.balancedate>='"+start_date+"'")}
${if(len(end_date)=0,"","and bpa.balancedate<='"+end_date+"'")}
${if(len(日期)=0,"","and 日期 in ('" + 日期+ "')")}