我有以下功能:
CREATE OR REPLACE FUNCTION "Sensor"."PersistTelemetry"(sid character varying, measurement character varying, val numeric, ts character varying)
RETURNS boolean
LANGUAGE 'plpgsql'
VOLATILE
COST 100
AS $BODY$DECLARE SUCCESS BOOLEAN;
BEGIN
BEGIN
SUCCESS = false;
INSERT INTO
"Sensor"."SensorReadings" (
sensorid,
reservoirid,
timestamp,
measurement,
value
)
VALUES
(
sid,
(
SELECT
reservoirid
FROM
"Sensor"."SystemSensors"
WHERE
sensorid = sid
),
to_timestamp(ts, 'YYYY/MM/DD hh24:mi:ss'),
measurement,
val
);
SUCCESS = true;
EXCEPTION WHEN OTHERS THEN
SUCCESS = false;
RAISE NOTICE 'ErError % %', SQLERRM, SQLSTATE;
END;
RETURN SUCCESS;
END; $BODY$;
我使用 Flask-sqlalchemy 调用它,执行和有效负载如下:
@app.route('/api/telemetry', methods=['POST'])
def persist_telemetry():
if not request.json:
abort(400)
sensorID = request.json['sensorID']
measurement = request.json['measurement']
value = request.json['value']
timestamp = request.json['timestamp']
params = {
'sensorid' : sensorID,
'measurement' : measurement,
'val' : value,
'ts' : timestamp
}
print(params)
result = db.session.execute("""select "Sensor"."PersistTelemetry"(:sensorid, :measurement, :val, :ts)""", params)
for r in result:
print(r)
return "success", 201
{'val': 8.8, 'sensorid': 'phSensorA.haoshiAnalogPh', 'ts': '2019-12-06 18:32:36', 'measurement': 'ph'}
我已经在我的服务器上启用了日志记录,并设置log_min_messages=notice
但是当查看日志时,我看到的只是:
2019-12-07 02:17:00 CST [14757-15] moedepi@SnooSongFarms LOG: statement: BEGIN
2019-12-07 02:17:00 CST [14757-16] moedepi@SnooSongFarms LOG: statement: select "Sensor"."PersistTelemetry"('phSensorA.haoshiAnalogPh', 'ph', 8.8, '2019-12-06 18:32:36')
2019-12-07 02:17:00 CST [14757-17] moedepi@SnooSongFarms LOG: statement: ROLLBACK
该函数返回 true,但我没有看到字符串 'ErError' 在日志中,所以这告诉我没有引发异常。
什么可能导致此插入回滚?我该如何进一步调试呢?
任何帮助深表感谢。