fix(influxdb): fixes bug when using regexps/numbers in tags

closes #6488

pkg/tsdb/influxdb/query_builder.go

@@ -2,6 +2,7 @@ package influxdb
 
 import (
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/grafana/grafana/pkg/tsdb"
@@ -42,7 +43,18 @@ func (qb *QueryBuilder) renderTags(query *Query) []string {
 			str += " "
 		}
 
-		res = append(res, fmt.Sprintf(`%s"%s" %s '%s'`, str, tag.Key, tag.Operator, tag.Value))
+		value := tag.Value
+		nValue, err := strconv.ParseFloat(tag.Value, 64)
+
+		if tag.Operator == "=~" || tag.Operator == "!~" {
+			value = fmt.Sprintf("%s", value)
+		} else if err == nil {
+			value = fmt.Sprintf("%v", nValue)
+		} else {
+			value = fmt.Sprintf("'%s'", value)
+		}
+
+		res = append(res, fmt.Sprintf(`%s"%s" %s %s`, str, tag.Key, tag.Operator, value))
 	}
 
 	return res

pkg/tsdb/influxdb/query_builder_test.go

@@ -3,6 +3,8 @@ package influxdb
 import (
 	"testing"
 
+	"strings"
+
 	"github.com/grafana/grafana/pkg/tsdb"
 	. "github.com/smartystreets/goconvey/convey"
 )
@@ -83,5 +85,23 @@ func TestInfluxdbQueryBuilder(t *testing.T) {
 			So(err, ShouldBeNil)
 			So(rawQuery, ShouldEqual, `Raw query`)
 		})
+
+		Convey("can render regex tags", func() {
+			query := &Query{Tags: []*Tag{&Tag{Operator: "=~", Value: "value", Key: "key"}}}
+
+			So(strings.Join(builder.renderTags(query), ""), ShouldEqual, `"key" =~ value`)
+		})
+
+		Convey("can render number tags", func() {
+			query := &Query{Tags: []*Tag{&Tag{Operator: "=", Value: "1", Key: "key"}}}
+
+			So(strings.Join(builder.renderTags(query), ""), ShouldEqual, `"key" = 1`)
+		})
+
+		Convey("can render string tags", func() {
+			query := &Query{Tags: []*Tag{&Tag{Operator: "=", Value: "value", Key: "key"}}}
+
+			So(strings.Join(builder.renderTags(query), ""), ShouldEqual, `"key" = 'value'`)
+		})
 	})
 }