获取BigQuery项目中所有BigQuery表的最后访问日期

Question

我知道如何获取上次修改表但未访问表的日期。是否有可能最后一次读取表？是否有查询或API来获取此信息？

Answer 1

如果BigQuery中有audit logs，则可以编写如下查询：

WITH tables AS (
  SELECT FORMAT("%s.%s.%s", table.projectId, table.datasetId, table.tableId) table
    , MAX(timestamp) last_access
  FROM (
    SELECT timestamp
      , protopayload_auditlog.servicedata_v1_bigquery.jobCompletedEvent.job.jobStatistics.referencedTables  
    FROM `fh-bigquery.audit.cloudaudit_googleapis_com_data_access_201811*`
  ), UNNEST(referencedTables) table
  GROUP BY 1
)

SELECT * 
FROM tables