Elastic: Store index in jsonData (#62808)

* feat(typescript): read and write index to jsonData

* feat(go): read index from jsonData

* clear database column when index-name is updated

* Update public/app/plugins/datasource/elasticsearch/datasource.ts

Co-authored-by: Gábor Farkas <gabor.farkas@gmail.com>

* Update public/app/plugins/datasource/elasticsearch/configuration/ElasticDetails.tsx

Co-authored-by: Gábor Farkas <gabor.farkas@gmail.com>

* add indexChangeHandler function

* fix

* fix failing tests

* fix

* fix

---------

Co-authored-by: Gábor Farkas <gabor.farkas@gmail.com>

pkg/tsdb/elasticsearch/elasticsearch.go

@@ -108,6 +108,14 @@ func newInstanceSettings(httpClientProvider httpclient.Provider) datasource.Inst
 			timeInterval = ""
 		}
 
+		index, ok := jsonData["index"].(string)
+		if !ok {
+			index = ""
+		}
+		if index == "" {
+			index = settings.Database
+		}
+
 		var maxConcurrentShardRequests float64
 
 		switch v := jsonData["maxConcurrentShardRequests"].(type) {
@@ -142,7 +150,7 @@ func newInstanceSettings(httpClientProvider httpclient.Provider) datasource.Inst
 			ID:                         settings.ID,
 			URL:                        settings.URL,
 			HTTPClient:                 httpCli,
-			Database:                   settings.Database,
+			Database:                   index,
 			MaxConcurrentShardRequests: int64(maxConcurrentShardRequests),
 			ConfiguredFields:           configuredFields,
 			Interval:                   interval,