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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2022/10/17 03:21:13 UTC
[GitHub] [iotdb] hyoHhh opened a new issue, #7630: 时间戳只能使用毫秒
hyoHhh opened a new issue, #7630:
URL: https://github.com/apache/iotdb/issues/7630
IoTDB默认使用毫秒， 但是其实IoTDB内部是用的long进行存储的，因此可以通过配置来支持微秒和纳秒。
在IoTDB配置文件(iotdb-engine.properties)中的如下配置:
```
# Use this value to set timestamp precision as "ms", "us" or "ns".
# Once the precision is been set, it can not be changed.
timestamp_precision=ms
```
这样的话，你传入一个long时间戳，就会将其按照微秒或者纳秒解读了。
不过目前的版本中 `now()`返回的是毫秒值， 所以如果将`timestamp_precision`设置为`us`或者`ns`，那么时间将来解析成人类可读的时间(yyyy-mm-dd HH:MM:ss)就会不太对。 这个会马上加PR修复。
By default, IoTDB considers a long timestamp as millisecond time unit, but you can change it in iotdb-engine.properties: `timestamp_precision=us` or `timestamp_precision=ns`.
But currently, `now()` function only returns `ms`.
_Originally posted by @jixuan1989 in https://github.com/apache/iotdb/issues/1276#issuecomment-634542829_
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[GitHub] [iotdb] hyoHhh commented on issue #7630: 时间戳只能使用毫秒
Posted by GitBox <gi...@apache.org>.
hyoHhh commented on issue #7630:
URL: https://github.com/apache/iotdb/issues/7630#issuecomment-1296228121
> 应该在0.12/0.13版本就支持了，可以尝试一下。
用的就是13.2版本,14版本支持,我试了,要自己编译
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[GitHub] [iotdb] HTHou commented on issue #7630: 时间戳只能使用毫秒
Posted by GitBox <gi...@apache.org>.
HTHou commented on issue #7630:
URL: https://github.com/apache/iotdb/issues/7630#issuecomment-1280265561
应该在0.12/0.13版本就支持了，可以尝试一下。
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[GitHub] [iotdb] HTHou closed issue #7630: 时间戳只能使用毫秒
Posted by GitBox <gi...@apache.org>.
HTHou closed issue #7630: 时间戳只能使用毫秒
URL: https://github.com/apache/iotdb/issues/7630
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