Add support to ElasticSearch 5.0

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

@@ -24,6 +24,7 @@ export class ElasticConfigCtrl {
   esVersions = [
     {name: '1.x', value: 1},
     {name: '2.x', value: 2},
+    {name: '5.x', value: 5},
   ];
 
   indexPatternTypeChanged() {

public/app/plugins/datasource/elasticsearch/datasource.js

@@ -182,7 +182,7 @@ function (angular, _, moment, kbn, ElasticQueryBuilder, IndexPattern, ElasticRes
         luceneQuery = luceneQuery.substr(1, luceneQuery.length - 2);
         esQuery = esQuery.replace("$lucene_query", luceneQuery);
 
-        var searchType = queryObj.size === 0 ? 'count' : 'query_then_fetch';
+        var searchType = (queryObj.size === 0 && this.esVersion < 5) ? 'count' : 'query_then_fetch';
         var header = this.getQueryHeader(searchType, options.range.from, options.range.to);
         payload +=  header + '\n';
 
@@ -243,7 +243,8 @@ function (angular, _, moment, kbn, ElasticQueryBuilder, IndexPattern, ElasticRes
 
     this.getTerms = function(queryDef) {
       var range = timeSrv.timeRange();
-      var header = this.getQueryHeader('count', range.from, range.to);
+      var searchType = this.esVersion >= 5 ? 'query_then_fetch' : 'count' ;
+      var header = this.getQueryHeader(searchType, range.from, range.to);
       var esQuery = angular.toJson(this.queryBuilder.getTermsQuery(queryDef));
 
       esQuery = esQuery.replace("$lucene_query", queryDef.query || '*');
@@ -251,7 +252,7 @@ function (angular, _, moment, kbn, ElasticQueryBuilder, IndexPattern, ElasticRes
       esQuery = esQuery.replace(/\$timeTo/g, range.to.valueOf());
       esQuery = header + '\n' + esQuery + '\n';
 
-      return this._post('/_msearch?search_type=count', esQuery).then(function(res) {
+      return this._post('/_msearch?search_type=' + searchType, esQuery).then(function(res) {
         var buckets = res.responses[0].aggregations["1"].buckets;
         return _.map(buckets, function(bucket) {
           return {text: bucket.key, value: bucket.key};

public/app/plugins/datasource/elasticsearch/query_builder.js

@@ -75,6 +75,14 @@ function (queryDef) {
 
     for (var i = 0; i < aggDef.settings.filters.length; i++) {
       var query = aggDef.settings.filters[i].query;
+      if (this.esVersion >= 5) {
+        filterObj[query] = {
+          query_string: {
+            query: query,
+            analyze_wildcard: true
+          }
+        };
+      } else {
         filterObj[query] = {
           query: {
             query_string: {
@@ -84,6 +92,7 @@ function (queryDef) {
           }
         };
       }
+    }
 
     return filterObj;
   };
@@ -106,7 +115,25 @@ function (queryDef) {
     target.timeField =  this.timeField;
 
     var i, nestedAggs, metric;
-    var query = {
+    var query = {};
+    if (this.esVersion >= 5) {
+      query = {
+        "size": 0,
+        "query": {
+          "bool": {
+            "must": [
+              {"range": this.getRangeFilter()},
+              {"query_string": {
+                "analyze_wildcard": true,
+                "query": '$lucene_query'
+                }
+              }
+            ]
+          }
+        }
+      };
+    } else {
+      query = {
         "size": 0,
         "query": {
           "filtered": {
@@ -124,6 +151,7 @@ function (queryDef) {
           }
         }
       };
+    }
 
     // handle document query
     if (target.bucketAggs.length === 0) {
@@ -199,7 +227,25 @@ function (queryDef) {
   };
 
   ElasticQueryBuilder.prototype.getTermsQuery = function(queryDef) {
-    var query = {
+    var query = {};
+    if (this.esVersion >= 5) {
+      query = {
+        "size": 0,
+        "query": {
+          "bool": {
+            "must": [
+              {"range": this.getRangeFilter()},
+              {"query_string": {
+                "analyze_wildcard": true,
+                "query": '$lucene_query'
+                }
+              }
+            ]
+          }
+        }
+      };
+    } else {
+      query = {
         "size": 0,
         "query": {
           "filtered": {
@@ -217,6 +263,7 @@ function (queryDef) {
           }
         }
       };
+    }
     query.aggs =  {
       "1": {
         "terms": {