I am creating an ElasticSearch query that I would like to alert on, but am not sure if there is a way to create an alert based on the contents of a string (such as contains or exact match). Is this something that can be done? Right now all the value options that I have only allow entering numeric values.

We’ve added new condition comparison options that allow strings to be evaluated with “equals” and “not equal to”.

Github issue Implemented new condition comparison options by ranbena · Pull Request #4240 · getredash/redash · GitHub.
Set to be released in Redash v9.