Add some temporary restrictions for dev release

pkg/report/step_join.go

@@ -50,6 +50,13 @@ func (j *stepJoin) Run(ctx context.Context, dd ...Datasource) (Datasource, error
 		return nil, fmt.Errorf("foreign join datasources not defined: %s", j.def.LocalSource)
 	}
 
+	// @todo temporarily disabled
+	for _, d := range dd {
+		if _, ok := d.(*joinedDataset); ok {
+			return nil, fmt.Errorf("unable to join a joined source: %s", d.Name())
+		}
+	}
+
 	// @todo multiple joins
 	return &joinedDataset{
 		def:     j.def,
@@ -399,6 +406,11 @@ func (d *joinedDataset) validateSort(def *FrameDefinition, dd FrameDescriptionSe
 		}
 	}
 
+	// @todo temporarily disabled
+	if sortDS != "" {
+		return fmt.Errorf("[temporary] initial sort can not by by a foreign column: %s", sortDS)
+	}
+
 	// The first one is always local so this is ok
 	localDscr := dd[0]
 	var dscr *FrameDescription

tests/reporter/3002_joining_base_nested_test.go

@@ -7,6 +7,9 @@ import (
 )
 
 func Test3002_joining_base_nested(t *testing.T) {
+
+	t.Skip("@todo temporarily disabled")
+
 	var (
 		ctx, h, s      = setup(t)
 		m, _, dd       = loadScenario(ctx, s, t, h)

tests/reporter/3003_joining_base_nested_complex_test.go

@@ -8,7 +8,7 @@ import (
 
 func Test3003_joining_base_nested_complex(t *testing.T) {
 
-	t.Skip("@todo")
+	t.Skip("@todo temporarily disabled")
 
 	var (
 		ctx, h, s      = setup(t)

tests/reporter/3006_joining_paging_nested_test.go

@@ -7,6 +7,9 @@ import (
 )
 
 func Test3006_joining_paging_nested(t *testing.T) {
+
+	t.Skip("@todo temporarily disabled")
+
 	var (
 		ctx, h, s      = setup(t)
 		m, _, dd       = loadScenario(ctx, s, t, h)