Elasticsearch: Fix ignoring precision when running queries trough backend

pkg/tsdb/elasticsearch/data_query.go

@@ -269,7 +269,7 @@ func addFiltersAgg(aggBuilder es.AggBuilder, bucketAgg *BucketAgg) es.AggBuilder
 
 func addGeoHashGridAgg(aggBuilder es.AggBuilder, bucketAgg *BucketAgg) es.AggBuilder {
 	aggBuilder.GeoHashGrid(bucketAgg.ID, bucketAgg.Field, func(a *es.GeoHashGridAggregation, b es.AggBuilder) {
-		a.Precision = bucketAgg.Settings.Get("precision").MustInt(3)
+		a.Precision = stringToIntWithDefaultValue(bucketAgg.Settings.Get("precision").MustString(), 3)
 		aggBuilder = b
 	})
 

pkg/tsdb/elasticsearch/data_query_test.go

@@ -612,7 +612,7 @@ func TestExecuteElasticsearchDataQuery(t *testing.T) {
 						"id": "3",
 						"type": "geohash_grid",
 						"field": "@location",
-						"settings": { "precision": 3 }
+						"settings": { "precision": "6" }
 					}
 				],
 				"metrics": [{"type": "count", "id": "1" }]
@@ -625,6 +625,56 @@ func TestExecuteElasticsearchDataQuery(t *testing.T) {
 			require.Equal(t, firstLevel.Aggregation.Type, "geohash_grid")
 			ghGridAgg := firstLevel.Aggregation.Aggregation.(*es.GeoHashGridAggregation)
 			require.Equal(t, ghGridAgg.Field, "@location")
+			require.Equal(t, ghGridAgg.Precision, 6)
+		})
+
+		t.Run("With geo hash grid agg with invalid int precision", func(t *testing.T) {
+			c := newFakeClient()
+			_, err := executeElasticsearchDataQuery(c, `{
+				"bucketAggs": [
+					{
+						"id": "3",
+						"type": "geohash_grid",
+						"field": "@location",
+						"settings": { "precision": 7 }
+					}
+				],
+				"metrics": [{"type": "count", "id": "1" }]
+			}`, from, to)
+			require.NoError(t, err)
+			sr := c.multisearchRequests[0].Requests[0]
+
+			firstLevel := sr.Aggs[0]
+			require.Equal(t, firstLevel.Key, "3")
+			require.Equal(t, firstLevel.Aggregation.Type, "geohash_grid")
+			ghGridAgg := firstLevel.Aggregation.Aggregation.(*es.GeoHashGridAggregation)
+			require.Equal(t, ghGridAgg.Field, "@location")
+			// It should default to 3
+			require.Equal(t, ghGridAgg.Precision, 3)
+		})
+
+		t.Run("With geo hash grid agg with no precision", func(t *testing.T) {
+			c := newFakeClient()
+			_, err := executeElasticsearchDataQuery(c, `{
+				"bucketAggs": [
+					{
+						"id": "3",
+						"type": "geohash_grid",
+						"field": "@location",
+						"settings": { "precision": 7 }
+					}
+				],
+				"metrics": [{"type": "count", "id": "1" }]
+			}`, from, to)
+			require.NoError(t, err)
+			sr := c.multisearchRequests[0].Requests[0]
+
+			firstLevel := sr.Aggs[0]
+			require.Equal(t, firstLevel.Key, "3")
+			require.Equal(t, firstLevel.Aggregation.Type, "geohash_grid")
+			ghGridAgg := firstLevel.Aggregation.Aggregation.(*es.GeoHashGridAggregation)
+			require.Equal(t, ghGridAgg.Field, "@location")
+			// It should default to 3
 			require.Equal(t, ghGridAgg.Precision, 3)
 		})