${if(len(year) == 0,"","and Date >= concat('" + year + "','-03-01')")}
Date是yyyy-mm-dd格式
year是下拉控件 yyyy格式
目前写法不生效
${if(len(year) == 0,"","and sunstr(Date,0,4) >= concat('" + year + "')")}||'-03-01',拼接到外面
${if(len(year) == 0,"","and Date >= '" + CONCATENATE(year,'-03-01') + "'")}