Start-with phrase search in document _id. Case-sensitivity problem

I want to search a phrase in document _id.
I added configuration to mapping template: "_id" : { "index":
"not_analyzed" }. It works just fine, the problem occurs when _id contains
lowercase and uppercase letters. For example for _id "BigMonkey" it
searches phrase by "*onkey" but can't find it by "*Monkey". How this can be

You received this message because you are subscribed to the Google Groups "elasticsearch" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
To view this discussion on the web visit
For more options, visit