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