[KQL] Support single-character wildcard

[alexfrancoeur]

Lucene query syntax allows for single character wildcards with a ?. There appears to be no equivalent in Kibana query language. Some users would like to have this functionality when using KQL.

Note: Similar functionality is possible with an * in the middle of a string, but likely will return more results. customer_namer: M*t could return Matt whereas customer_namer: M?t could only return a name with the length of 3, such as Mat

[elasticmachine]

Pinging @elastic/kibana-app

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)

[trickfountain]

+1
This would be very useful for your french (and other accented language) customers since it's a common "typo" that we have to deal with. For now I am using * wildcard but as Alex points out it's cleaner when you can simply use "?".

Also, accents are pretty common for the first letter and the use of * as a first character is specifically not recommended in ES docs (for good reasons).

Example: trying to search for "élevé". Would like to use "?lev?" Now I am using "lev" but it also returns unwanted match "relevé" and is expensive to run.