Influx DB - Erste/Letzter Wert

Question

I erste und letzte Werte von Last-Minute-db timeseries von einem Zustrom bin Auswahl, hier sind Anfragen:

echo -e 'LAST VALUE' && \ 
curl -G 'http://db_address:8086/query?q=select+last(value)+from+ambient_temperature+where+time>now()+-+1m&db=home_data' && \ 
echo -e '\nFIRST VALUE' && \ 
curl -G 'http://db_address:8086/query?q=select+first(value)+from+ambient_temperature+where+time>now()+-+1m&db=home_data' && \ 
echo -e '\nlast values' && \ 
curl -G 'http://db_address:8086/query?q=select+*+from+ambient_temperature+where+time>now()+-+2m&db=home_data' 

LAST VALUE 
{"results":[{"series":[{"name":"ambient_temperature","columns":["time","last"],"values":[["2016-05-19T08:43:09.645833512Z",20.71875]]}]}]} 
FIRST VALUE 
{"results":[{"series":[{"name":"ambient_temperature","columns":["time","first"],"values":[["2016-05-19T08:43:09.700503355Z",20.71875]]}]}]} 
last values 
{"results":[{"series":[{"name":"ambient_temperature","columns":["time","value"],"values":[["2016-05-19T08:42:11.69Z",20.71875],["2016-05-19T08:42:13.715Z",20.71875],["2016-05-19T08:42:15.695 Z",20.71875],["2016-05-19T08:42:17.705Z",20.71875],["2016-05-19T08:42:19.714Z",20.71875],["2016-05-19T08:42:21.71Z",20.71875],["2016-05-19T08:42:23.719Z",20.71875],["2016-05-19T08:42:25.729Z ",20.71875],["2016-05-19T08:42:27.724Z",20.71875],["2016-05-19T08:42:29.734Z",20.71875],["2016-05-19T08:42:31.788Z",20.71875],["2016-05-19T08:42:33.783Z",20.71875],["2016-05-19T08:42:35.764Z ",20.71875],["2016-05-19T08:42:37.758Z",20.71875],["2016-05-19T08:42:39.753Z",20.71875],["2016-05-19T08:42:41.793Z",20.71875],["2016-05-19T08:42:43.772Z",20.71875],["2016-05-19T08:42:45.782Z ",20.71875],["2016-05-19T08:42:47.777Z",20.71875],["2016-05-19T08:42:49.787Z",20.71875],["2016-05-19T08:42:51.782Z",20.71875],["2016-05-19T08:42:53.792Z",20.71875],["2016-05-19T08:42:55.846Z ",20.71875],["2016-05-19T08:42:57.796Z",20.71875],["2016-05-19T08:42:59.807Z",20.71875],["2016-05-19T08:43:01.816Z",20.71875],["2016-05-19T08:43:03.841Z",20.71875],["2016-05-19T08:43:05.851Z ",20.71875],["2016-05-19T08:43:07.831Z",20.71875],["2016-05-19T08:43:09.855Z",20.71875],["2016-05-19T08:43:11.865Z",20.71875],["2016-05-19T08:43:13.86Z",20.71875],["2016-05-19T08:43:15.84Z", 20.71875],["2016-05-19T08:43:17.85Z",20.71875],["2016-05-19T08:43:19.859Z",20.71875],["2016-05-19T08:43:21.869Z",20.71875],["2016-05-19T08:43:23.864Z",20.71875],["2016-05-19T08:43:25.874Z",2 0.71875],["2016-05-19T08:43:27.869Z",20.71875],["2016-05-19T08:43:29.879Z",20.71875],["2016-05-19T08:43:31.919Z",20.71875],["2016-05-19T08:43:33.883Z",20.71875],["2016-05-19T08:43:35.893Z",2 0.71875],["2016-05-19T08:43:37.903Z",20.71875],["2016-05-19T08:43:39.899Z",20.71875],["2016-05-19T08:43:41.908Z",20.71875],["2016-05-19T08:43:43.918Z",20.71875],["2016-05-19T08:43:45.913Z",2 0.71875],["2016-05-19T08:43:47.937Z",20.71875],["2016-05-19T08:43:49.932Z",20.71875],["2016-05-19T08:43:51.942Z",20.71875],["2016-05-19T08:43:53.937Z",20.71875],["2016-05-19T08:43:55.947Z",2 0.71875],["2016-05-19T08:43:57.972Z",20.71875],["2016-05-19T08:43:59.981Z",20.71875],["2016-05-19T08:44:01.976Z",20.71875],["2016-05-19T08:44:03.971Z",20.71875],["2016-05-19T08:44:05.981Z",2 0.71875],["2016-05-19T08:44:07.991Z",20.71875]]}]}]} 

Aber ich verstehe nicht zurückgegebenen Ergebnisse, für die letzten und ersten Werte, die ich eine Zeit erhalten, die keine Zeit in meiner Serie überein (siehe letzte Anforderung, die Werte von den letzten 2 Minuten abfragt), sollte ich eine Zeit haben:

• 2016-05-19T08:42:11.69Z für das erste Element
• 2016-05-19T08:44:07.991Z für letztes Element

Woher kommen die ersten und letzten Werte? Warum der erste und der letzte Wert nicht korrekt sind?

Answer 1

Hier ist die Antwort von influxdb: https://github.com/influxdata/influxdb/issues/6684