1-- 2-- Copyright 2023 The Android Open Source Project 3-- 4-- Licensed under the Apache License, Version 2.0 (the "License"); 5-- you may not use this file except in compliance with the License. 6-- You may obtain a copy of the License at 7-- 8-- https://www.apache.org/licenses/LICENSE-2.0 9-- 10-- Unless required by applicable law or agreed to in writing, software 11-- distributed under the License is distributed on an "AS IS" BASIS, 12-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13-- See the License for the specific language governing permissions and 14-- limitations under the License. 15 16-- Given two slice ids, returns whether the first is an ancestor of the second. 17CREATE PERFETTO FUNCTION slice_is_ancestor( 18 -- Id of the potential ancestor slice. 19 ancestor_id LONG, 20 -- Id of the potential descendant slice. 21 descendant_id LONG 22) 23-- Whether `ancestor_id` slice is an ancestor of `descendant_id`. 24RETURNS BOOL AS 25SELECT 26 ancestor.track_id = descendant.track_id AND 27 ancestor.ts <= descendant.ts AND 28 (ancestor.dur == -1 OR ancestor.ts + ancestor.dur >= descendant.ts + descendant.dur) 29FROM slice ancestor 30JOIN slice descendant 31WHERE ancestor.id = $ancestor_id 32 AND descendant.id = $descendant_id;