查询失败错误：查询执行期间超出了资源：无法在分配的内存中执行查询

Question

我正在使用标准SQL，即使它是基本查询，它仍然会引发错误。任何建议请

SELECT 
  fullVisitorId,
  CONCAT(CAST(fullVisitorId AS string),CAST(visitId AS string)) AS session,
  date,
  visitStartTime,
  hits.time,
  hits.page.pagepath
FROM
  `XXXXXXXXXX.ga_sessions_*`,
  UNNEST(hits) AS hits
WHERE
  _TABLE_SUFFIX BETWEEN "20160801"
  AND "20170331"
ORDER BY
  fullVisitorId,
  date,
  visitStartTime

Answer 1

该查询起作用的唯一方法是删除最后应用的顺序：

SELECT 
  fullVisitorId,
  CONCAT(CAST(fullVisitorId AS string),CAST(visitId AS string)) AS session,
  date,
  visitStartTime,
  hits.time,
  hits.page.pagepath
FROM
  `XXXXXXXXXX.ga_sessions_*`,
  UNNEST(hits) AS hits
WHERE
  _TABLE_SUFFIX BETWEEN "20160801"
  AND "20170331"

ORDER BY 操作非常昂贵，无法并行处理，因此请尽量避免操作（或尝试将其应用在有限的结果集中）