在keyword类型字段上应用排序时，它按字典顺序进行处理并针对给定数据：
AAAAAAAAAAA
AAAAaaaa
Aaaaaa
jjjjjaaa
jjjjjAAA
JJJJJJjjjj
aaaJJJJJjjjj
排序后变为：
AAAAAAAAAAA
AAAAaaaa
Aaaaaa
JJJJJJjjjj
aaaJJJJJjjjj
jjjjjAAA
jjjjjaaa
期望：是否可以根据字母顺序进行排序？
aaaJJJJJjjjj
Aaaaaa
AAAAaaaa
AAAAAAAAAAA
jjjjjaaa
jjjjjAAA
JJJJJJjjjj
请不要那样，我已经尝试过lowercase过滤器选项，并得到了以下不是我要求的结果：
Aaaaaa
AAAAaaaa
AAAAAAAAAAA
aaaJJJJJjjjj
jjjjjaaa
jjjjjAAA
JJJJJJjjjj