Don't pass datasource to newPostgresMacroEngine

pkg/tsdb/postgres/macros.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/tsdb"
 )
 
@@ -21,10 +20,8 @@ type postgresMacroEngine struct {
 	timescaledb bool
 }
 
-func newPostgresMacroEngine(datasource *models.DataSource) tsdb.SqlMacroEngine {
-	engine := &postgresMacroEngine{}
-	engine.timescaledb = datasource.JsonData.Get("timescaledb").MustBool(false)
-	return engine
+func newPostgresMacroEngine(timescaledb bool) tsdb.SqlMacroEngine {
+	return &postgresMacroEngine{timescaledb: timescaledb}
 }
 
 func (m *postgresMacroEngine) Interpolate(query *tsdb.Query, timeRange *tsdb.TimeRange, sql string) (string, error) {

pkg/tsdb/postgres/macros_test.go

@@ -6,19 +6,14 @@ import (
 	"testing"
 	"time"
 
-	"github.com/grafana/grafana/pkg/components/simplejson"
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/tsdb"
 	. "github.com/smartystreets/goconvey/convey"
 )
 
 func TestMacroEngine(t *testing.T) {
 	Convey("MacroEngine", t, func() {
-		datasource := &models.DataSource{JsonData: simplejson.New()}
-		engine := newPostgresMacroEngine(datasource)
-		datasourceTS := &models.DataSource{JsonData: simplejson.New()}
-		datasourceTS.JsonData.Set("timescaledb", true)
-		engineTS := newPostgresMacroEngine(datasourceTS)
+		engine := newPostgresMacroEngine(false)
+		engineTS := newPostgresMacroEngine(true)
 		query := &tsdb.Query{}
 
 		Convey("Given a time range between 2018-04-12 00:00 and 2018-04-12 00:05", func() {

pkg/tsdb/postgres/postgres.go

@@ -32,7 +32,9 @@ func newPostgresQueryEndpoint(datasource *models.DataSource) (tsdb.TsdbQueryEndp
 		log: logger,
 	}
 
-	return tsdb.NewSqlQueryEndpoint(&config, &rowTransformer, newPostgresMacroEngine(datasource), logger)
+	timescaledb := datasource.JsonData.Get("timescaledb").MustBool(false)
+
+	return tsdb.NewSqlQueryEndpoint(&config, &rowTransformer, newPostgresMacroEngine(timescaledb), logger)
 }
 
 func generateConnectionString(datasource *models.DataSource) string {