Elasticsearch notes

elasticsearch_notes.md

Elasticsearch notes

Things named "explain"

Three things can be explained in elasticsearch:

Explain for each hit how its score was computed (Docs: Explain)

GET <index>/<type>/_search?explain
{
	"query": {
		...
	}
}

or

GET <index>/<type>/_search
{
	"explain": true,
	"query": {
		...
	}
}

Explain how a query will be executed (Docs: Validating Queries)

GET <index>/<type>/_validate/query?explain
{
	"query": {
		...
	}
}

Explain why a certain document matches or doesn't match a query (Docs: Explain API)

GET <index>/<type>/<id>/_explain
{
	"query": {
		...
	}
}