ES 2.2 Find posts with attachments that have a specific file suffix on them?

[iaresee]

Perusing what little ES documentation I could find, I can't see a way to do this. Is it possible to list posts on a forum that have attachments with a specific suffix like .syx on them? Are attachments even indexed by the ES and ElasticSearch?

 

[Brogan]

That's not possible with either the default mysql search or XFES.