In this chapter, we discussed how to implement autocomplete, highlighting, and correcting user typos. Elasticsearch doesn't support traditional SQL joins, and you learned how to use parent-child and nested mapping to handle relationships between different document types. We discussed filtering based on geolocation and how to use location as one of factors driving the relevance score. We also discussed using Painless scripting language to query based on user-defined scripts. We also covered Search Templates and how to query Elasticsearch from your application.
In the next chapter, we will discuss aggregations and how to use them to slice and dice your data.
