diff --git a/go/vt/vtgate/engine/sequential.go b/go/vt/vtgate/engine/sequential.go
index 759d48fcc2f..3c3e77f2ca1 100644
--- a/go/vt/vtgate/engine/sequential.go
+++ b/go/vt/vtgate/engine/sequential.go
@@ -69,7 +69,7 @@ func (s *Sequential) GetTableName() string {
 func (s *Sequential) TryExecute(ctx context.Context, vcursor VCursor, bindVars map[string]*querypb.BindVariable, wantFields bool) (*sqltypes.Result, error) {
 	finalRes := &sqltypes.Result{}
 	for _, source := range s.Sources {
-		res, err := source.TryExecute(ctx, vcursor, bindVars, wantFields)
+		res, err := vcursor.ExecutePrimitive(ctx, source, bindVars, wantFields)
 		if err != nil {
 			return nil, err
 		}
diff --git a/go/vt/vtgate/planbuilder/operator_transformers.go b/go/vt/vtgate/planbuilder/operator_transformers.go
index 35d9f91021f..11a7ae60cee 100644
--- a/go/vt/vtgate/planbuilder/operator_transformers.go
+++ b/go/vt/vtgate/planbuilder/operator_transformers.go
@@ -82,6 +82,17 @@ func transformSequential(ctx *plancontext.PlanningContext, op *operators.Sequent
 		if err != nil {
 			return nil, err
 		}
+		pw, ok := lp.(*primitiveWrapper)
+		if ok {
+			switch dml := pw.prim.(type) {
+			case *engine.Update:
+				dml.PreventAutoCommit = true
+			case *engine.Delete:
+				dml.PreventAutoCommit = true
+			case *engine.Insert:
+				dml.PreventAutoCommit = true
+			}
+		}
 		lps = append(lps, lp)
 	}
 	return &sequential{
diff --git a/go/vt/vtgate/planbuilder/operators/sequential.go b/go/vt/vtgate/planbuilder/operators/sequential.go
index 92242feb403..2b333c6270a 100644
--- a/go/vt/vtgate/planbuilder/operators/sequential.go
+++ b/go/vt/vtgate/planbuilder/operators/sequential.go
@@ -28,12 +28,6 @@ type Sequential struct {
 	noColumns
 }
 
-func newSequential(srcs []ops.Operator) *Sequential {
-	return &Sequential{
-		Sources: srcs,
-	}
-}
-
 // Clone implements the Operator interface
 func (s *Sequential) Clone(inputs []ops.Operator) ops.Operator {
 	newOp := *s
diff --git a/go/vt/vtgate/planbuilder/plan_test.go b/go/vt/vtgate/planbuilder/plan_test.go
index c84072a252a..9c1592fdf81 100644
--- a/go/vt/vtgate/planbuilder/plan_test.go
+++ b/go/vt/vtgate/planbuilder/plan_test.go
@@ -175,6 +175,13 @@ func setFks(t *testing.T, vschema *vindexes.VSchema) {
 
 		_ = vschema.AddForeignKey("unsharded_fk_allow", "u_multicol_tbl2", createFkDefinition([]string{"cola", "colb"}, "u_multicol_tbl1", []string{"cola", "colb"}, sqlparser.SetNull, sqlparser.SetNull))
 		_ = vschema.AddForeignKey("unsharded_fk_allow", "u_multicol_tbl3", createFkDefinition([]string{"cola", "colb"}, "u_multicol_tbl2", []string{"cola", "colb"}, sqlparser.Cascade, sqlparser.Cascade))
+
+		_ = vschema.AddForeignKey("unsharded_fk_allow", "fk_t3", createFkDefinition([]string{"col"}, "fk_t2", []string{"col2"}, sqlparser.SetNull, sqlparser.SetNull))
+		_ = vschema.AddForeignKey("unsharded_fk_allow", "fk_t4", createFkDefinition([]string{"col3"}, "fk_t3", []string{"col2"}, sqlparser.SetNull, sqlparser.SetNull))
+		_ = vschema.AddPrimaryKey("unsharded_fk_allow", "fk_t2", []string{"id"})
+		_ = vschema.AddPrimaryKey("unsharded_fk_allow", "fk_t3", []string{"id"})
+		_ = vschema.AddPrimaryKey("unsharded_fk_allow", "fk_t4", []string{"id"})
+		_ = vschema.AddUniqueKey("unsharded_fk_allow", "fk_t3", sqlparser.Exprs{sqlparser.NewColName("col")})
 	}
 
 	_ = vschema.AddPrimaryKey("unsharded_fk_allow", "u_tbl1", []string{"id"})
@@ -184,6 +191,7 @@ func setFks(t *testing.T, vschema *vindexes.VSchema) {
 	_ = vschema.AddUniqueKey("unsharded_fk_allow", "u_tbl9", sqlparser.Exprs{sqlparser.NewColName("col9"), sqlparser.NewColName("foo")})
 	_ = vschema.AddUniqueKey("unsharded_fk_allow", "u_tbl9", sqlparser.Exprs{sqlparser.NewColName("foo"), sqlparser.NewColName("bar")})
 	_ = vschema.AddUniqueKey("unsharded_fk_allow", "u_tbl9", sqlparser.Exprs{sqlparser.NewColName("bar"), sqlparser.NewColName("col9")})
+	_ = vschema.AddUniqueKey("unsharded_fk_allow", "u_tbl8", sqlparser.Exprs{sqlparser.NewColName("col8")})
 }
 
 func TestSystemTables57(t *testing.T) {
diff --git a/go/vt/vtgate/planbuilder/sequential.go b/go/vt/vtgate/planbuilder/sequential.go
index 8080043265b..ff6abacb437 100644
--- a/go/vt/vtgate/planbuilder/sequential.go
+++ b/go/vt/vtgate/planbuilder/sequential.go
@@ -30,17 +30,7 @@ var _ logicalPlan = (*sequential)(nil)
 func (s *sequential) Primitive() engine.Primitive {
 	var sources []engine.Primitive
 	for _, source := range s.sources {
-		prim := source.Primitive()
-		switch dml := prim.(type) {
-		case *engine.Update:
-			dml.PreventAutoCommit = true
-		case *engine.Delete:
-			dml.PreventAutoCommit = true
-		case *engine.Insert:
-			dml.PreventAutoCommit = true
-		}
-		sources = append(sources, prim)
+		sources = append(sources, source.Primitive())
 	}
-
 	return engine.NewSequential(sources)
 }
diff --git a/go/vt/vtgate/schema/tracker.go b/go/vt/vtgate/schema/tracker.go
index 9d966e17048..c4b48ce8156 100644
--- a/go/vt/vtgate/schema/tracker.go
+++ b/go/vt/vtgate/schema/tracker.go
@@ -223,7 +223,6 @@ func (t *Tracker) GetIndexes(ks string, tbl string) []*sqlparser.IndexDefinition
 
 	tblInfo := t.tables.get(ks, tbl)
 	return tblInfo.Indexes
-
 }
 
 // Tables returns a map with the columns for all known tables in the keyspace