Google Firebase 事件原始数据中的键 "previous_timestamp_micros" 是什么意思

Question

我已将 Google Firebase 事件原始数据导出到 Google BigQuery。每个事件有四个键：name、params、timestamp_micros、previous_timestamp_micros。例如，我通过了下面的 session_start 事件，该事件是从我的数据

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键是什么意思？是同一用户之前session_start的时间戳吗？还是同一用户之前事件的时间戳？我查了资料，好像这两个猜测都不对。

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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Google Firebase 事件原始数据中的键 "previous_timestamp_micros" 是什么意思

What's the meaning of the key "previous_timestamp_micros" in the Google Firebase event raw data

firebase

google-bigquery

firebase-analytics