_ts如何在DocumentDB中更改 [英] How _ts change in DocumentDB

问题描述

我对documentdb中的_ts字段有疑问.如何确定?我的理解是，在添加/更改文档时，它会获得一个新的_ts.两个文档是否有相同的_ts?如果是这样，只有在正确的时间(以毫秒为单位)添加这些文档时，这种情况才会发生.

I have a question regarding the _ts field within the documentdb. How is it determined? My understanding is that when a document is added/altered it gets a new _ts. Are there any chance that two documents have the same _ts? If so, does it happen only if those documents are added at the exact time (in terms of milli second).

推荐答案

_ts是一个系统属性，表示上一次更新文档(例如创建或替换)的时间.

_ts is a system property denoting when a document was last updated (e.g. create or replace).

_ts表示为 POSIX或纪元时间值.换句话说，它是自1970年1月1日00:00:00(UTC)起经过的秒数(不是毫秒).

_ts is represented as a POSIX or epoch time value. In other words, its the number of seconds (not milliseconds) that have elapsed since 00:00:00 (UTC), 1 January 1970.

如果在同一秒钟内写入/更新了多个文档，则多个文档中可能具有相同的_ts值.

It is possible to have the same _ts value across multiple documents when there are multiple documents written/updated during the same second.

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