[DOC] Confirmation in the docs that sorting by a script is supported

[calebmer]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request.

I can’t find any mention in the docs of sorting by a script (I would expect it on the Sort results page). Sorting by a script was supported in ElasticSearch 7.10 (source) and I see code referencing this feature in the OpenSearch repository (source).

I have not tested to confirm script sorting works in OpenSearch but it seems like it should? It would be nice for the docs to confirm this.

What other resources are available?

• https://www.elastic.co/guide/en/elasticsearch/reference/7.10/sort-search-results.html
• https://github.com/opensearch-project/OpenSearch/blob/b282005191bca3e3dd5b5ad5eb347dcaf296e4e5/server/src/main/java/org/opensearch/search/sort/ScriptSortBuilder.java#L79-L87

[hdhalter]

@macohen - Do you know if we support this and, if so, any recommendations on how to document it?