查詢失敗錯誤：在查詢執行過程中超出資源：查詢無法在分配的內存中執行

Question

我正在使用標準SQL。儘管它的基本查詢仍然存在引發錯誤的問題。任何建議請

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

此查詢工作的唯一方法是通過去除最終應用的排序：

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操作是相當昂貴的，並且不能被並行處理，從而儘量避免它（或嘗試將其應用於有限的結果集中）

Answer 2

除了接受的答案，您可能希望按日期對錶進行分區以減少使用昂貴查詢的內存量。