1 files changed, 33 insertions, 0 deletions
diff --git a/lib/gitlab/ci/processable_object_hierarchy.rb b/lib/gitlab/ci/processable_object_hierarchy.rb
new file mode 100644
index 00000000000..1122361e27e
--- /dev/null
+++ b/lib/gitlab/ci/processable_object_hierarchy.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class ProcessableObjectHierarchy < ::Gitlab::ObjectHierarchy
+      private
+
+      def middle_table
+        ::Ci::BuildNeed.arel_table
+      end
+
+      def from_tables(cte)
+        [objects_table, cte.table, middle_table]
+      end
+
+      def parent_id_column(_cte)
+        middle_table[:name]
+      end
+
+      def ancestor_conditions(cte)
+        middle_table[:name].eq(objects_table[:name]).and(
+          middle_table[:build_id].eq(cte.table[:id])
+        )
+      end
+
+      def descendant_conditions(cte)
+        middle_table[:build_id].eq(objects_table[:id]).and(
+          middle_table[:name].eq(cte.table[:name])
+        )
+      end
+    end
+  end
+end