1-- 2-- Copyright 2020 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 17-- Creates a span view for counters that may be global or associated with a 18-- process, assuming that in the latter case we don't actually care about the 19-- process (probably because it's always system_server). We may want to erase 20-- this distinction for example when merging system properties and atrace 21-- counters. 22-- 23-- It also does another type of merging: it merges together temporally adjacent 24-- identical values. 25 26DROP VIEW IF EXISTS {{table_name}}_span; 27CREATE VIEW {{table_name}}_span AS 28SELECT 29 ts, 30 LEAD(ts, 1, (SELECT end_ts + 1 FROM trace_bounds)) 31 OVER(ORDER BY ts) - ts AS dur, 32 CAST(value AS INT) AS {{table_name}}_val 33FROM ( 34 SELECT ts, value, LAG(value) OVER (ORDER BY ts) AS lag_value 35 FROM counter c JOIN counter_track t 36 ON t.id = c.track_id 37 WHERE name = '{{counter_name}}' 38) 39WHERE value != lag_value OR lag_value IS NULL; 40