Elasticsearch has a few functionalities where scripts can be used. You've already seen examples such as updating documents, filtering, and searching. Regardless of the fact that this seems to be advanced, we will take a look at the possibilities offered by Elasticsearch, because scripts are priceless for some use cases.
If we look at any request made to Elasticsearch that uses scripts, we will notice some similar properties, which are as follows:
Lang: This property defines the field that provides information about the script language. If it is omitted, Elasticsearch assumesmvel.Params: This object contains parameters and their values. Every defined parameter can be used inside the script by specifying that parameter name. Using parameters, we can write cleaner code. Scripts using parameters are executed faster than code with embedded constants because of caching.