API: Query database from /api/health endpoint (#28349)

pkg/services/sqlstore/health.go

@@ -10,5 +10,6 @@ func init() {
 }
 
 func GetDBHealthQuery(query *models.GetDBHealthQuery) error {
-	return x.Ping()
+	_, err := x.Exec("SELECT 1")
+	return err
 }

pkg/services/sqlstore/health_test.go

@@ -0,0 +1,18 @@
+// +build integration
+
+package sqlstore
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetDBHealthQuery(t *testing.T) {
+	InitTestDB(t)
+
+	query := models.GetDBHealthQuery{}
+	err := GetDBHealthQuery(&query)
+	require.NoError(t, err)
+}