mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-01-08 06:12:55 +00:00
35898f0b2e
* tests: more flow testcase * tests(WIP): more tests * tests: more flow tests * test: wired regex for sqlness * refactor: put blog&example to two files
65 lines
1.3 KiB
SQL
65 lines
1.3 KiB
SQL
-- blog usecase
|
|
CREATE TABLE velocity (
|
|
ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
|
|
left_wheel FLOAT,
|
|
right_wheel FLOAT,
|
|
TIME INDEX(ts)
|
|
);
|
|
|
|
CREATE TABLE avg_speed (
|
|
avg_speed DOUBLE,
|
|
start_window TIMESTAMP TIME INDEX,
|
|
end_window TIMESTAMP,
|
|
update_at TIMESTAMP,
|
|
);
|
|
|
|
CREATE FLOW calc_avg_speed SINK TO avg_speed AS
|
|
SELECT
|
|
avg((left_wheel + right_wheel) / 2)
|
|
FROM
|
|
velocity
|
|
WHERE
|
|
left_wheel > 0.5
|
|
AND right_wheel > 0.5
|
|
AND left_wheel < 60
|
|
AND right_wheel < 60
|
|
GROUP BY
|
|
tumble(ts, '5 second');
|
|
|
|
INSERT INTO
|
|
velocity
|
|
VALUES
|
|
("2021-07-01 00:00:00.200", 0.0, 0.7),
|
|
("2021-07-01 00:00:00.200", 0.0, 61.0),
|
|
("2021-07-01 00:00:02.500", 2.0, 1.0,);
|
|
|
|
-- SQLNESS REPLACE (ADMIN\sFLUSH_FLOW\('\w+'\)\s+\|\n\+-+\+\n\|\s+)[0-9]+\s+\| $1 FLOW_FLUSHED |
|
|
ADMIN FLUSH_FLOW('calc_avg_speed');
|
|
|
|
SELECT
|
|
avg_speed,
|
|
start_window
|
|
FROM
|
|
avg_speed;
|
|
|
|
INSERT INTO
|
|
velocity
|
|
VALUES
|
|
("2021-07-01 00:00:05.100", 5.0, 4.0),
|
|
("2021-07-01 00:00:09.600", 2.3, 2.1);
|
|
|
|
-- SQLNESS REPLACE (ADMIN\sFLUSH_FLOW\('\w+'\)\s+\|\n\+-+\+\n\|\s+)[0-9]+\s+\| $1 FLOW_FLUSHED |
|
|
ADMIN FLUSH_FLOW('calc_avg_speed');
|
|
|
|
SELECT
|
|
avg_speed,
|
|
start_window
|
|
FROM
|
|
avg_speed;
|
|
|
|
DROP FLOW calc_avg_speed;
|
|
|
|
DROP TABLE velocity;
|
|
|
|
DROP TABLE avg_speed;
|