firebase - Google Firebase事件原始数据中关键 "previous_timestamp_micros"的含义是什么

Question

我已将 Google Firebase 事件原始数据导出到 Google BigQuery。每个事件都有四个键:name、params、timestamp_micros、previous_timestamp_micros。例如，我过去了一个 session_start 事件，下面是从我的数据中提取的

"event_dim":[
    {"name":"session_start",
     "params":[
         {"key":"firebase_event_origin",
          "value":{"string_value":"auto"}}],
     "timestamp_micros":"1467374617058000",
     "previous_timestamp_micros":"1467191135684000"}, ...]

previous_timestamp_micros 键的含义是什么？是同一用户的上一个 session_start 的时间戳吗？或者是同一用户先前事件的时间戳？我查了资料，看来这两种猜测都不正确。

Answer 1

以下来自 event_dim 架构

timestamp_micros            INTEGER     The timestamp (in microseconds) at which this  
                                        event was logged.   
previous_timestamp_micros   INTEGER     The timestamp (in microseconds) at which this  
                                        event was previously logged.

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