In a list I have a column with these values :

 MyField
 -------
 foo.A
 foo.B
 foo.*

I want to search for these values. I've plumbed all managed properties and crawled content.

* If I search `myfield:"foo."`, all results are returned ==> **Expected**
* If I search `myfield:"foo.A"`, results with the `foo.A` are returned.==> **Expected**
* If I search `myfield:"foo.*"`, both `foo.A` and `foo.B` are returned, but not `foo.*` ==> ***not* Expected**. I need to get *only* `foo.*`

How to search for literal `*` ? 

I also tried : `myfield:"foo.\*"`, `myfield:"\foo.*"`, `myfield:{"foo.*"}`, but none worked.

Documentation does not mention any way to escape special characters.

thanks