在JDBC数据集的sql中无法自行引用父节点的数据必须加下标

${has($.batch_nums[0])?("and batch_num in ('"+replaceAll($.batch_nums[0],",", "','")+"')"):""}

把下标去掉就报错了

${has($.batch_nums)?("and batch_num in ('"+replaceAll($.batch_nums,",", "','")+"')"):""}

麻烦管理员请解答一下，谢谢