--
-- Copyright 2024 The Android Open Source Project
--
-- Licensed under the Apache License, Version 2.0 (the 'License');
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
--     https://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an 'AS IS' BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.

INCLUDE PERFETTO MODULE graphs.search;

-- Given a table containing the edges in a tree and a table of start_nodes,
-- returns the ids of all the nodes reachable by walking up the tree from each
-- of the start nodes.
CREATE PERFETTO MACRO _tree_reachable_ancestors_or_self(
  tree TableOrSubquery,
  start_nodes TableOrSubquery
)
RETURNS TableOrSubquery
AS
(
  SELECT node_id AS id
  FROM graph_reachable_dfs!(
    (SELECT id AS source_node_id, parent_id AS dest_node_id FROM $tree),
    (SELECT id AS node_id FROM $start_nodes)
  )
);
