hi @ghouston10,
I think the answer is, it depends.
- In any place you would be using Painless, for example, in Kibana's scripted fields, you can use Regex to do substring matches on a field-value.
See here for an example: Substring in painless
- You can also do prefix-queries with lucene using the wildcard character. So in the Kibana query-bar, you could do something like
url:https*
to search for all https calls. The wildcard query in lucene cannot be put at the start of a string. More info on that here: https://lucene.apache.org/core/2_9_4/queryparsersyntax.html#Terms