Merge pull request #14074 from stop-cran/feature/14072

elasticsearch: do not set a placeholder to index name, if it's already specified

public/app/plugins/datasource/elasticsearch/config_ctrl.ts

@@ -28,9 +28,13 @@ export class ElasticConfigCtrl {
   ];
   ];
 
 
   indexPatternTypeChanged() {
   indexPatternTypeChanged() {
+    if (!this.current.database ||
+        this.current.database.length === 0 ||
+        this.current.database.startsWith('[logstash-]')) {
         const def = _.find(this.indexPatternTypes, {
         const def = _.find(this.indexPatternTypes, {
           value: this.current.jsonData.interval,
           value: this.current.jsonData.interval,
         });
         });
         this.current.database = def.example || 'es-index-name';
         this.current.database = def.example || 'es-index-name';
     }
     }
+  }
 }
 }