由于内部错误，不支持相关子查询模式 - 其中不存在相关子查询

Question

我有一个查询给出了上述错误。我的代码如下：

SELECT *,
      dense_rank() OVER (PARTITION BY email
                         ORDER BY priority_score,
                                  comp) AS r
FROM main_query
WHERE NOT EXISTS
   (SELECT name,
           event,
           email,
           report_date
    FROM gm
    WHERE  gm.name= main_query.name
      AND gm.event= main_query.event
      AND gm.email = main_query.email
      AND gm.report_date >= (CURRENT_DATE - 25)::date)
ORDER BY priority_score ASC

我看到克服这些类型错误的一种解决方案是能够在不相关的查询 (sherlock) 中转换相关的子查询。因此，我正在寻找其他使用 where not exists 语句但没有相关子查询的方法，即在子查询 ((...) from gm left join main_query on(...))。有谁知道这是否可行以及如何实现？

非常欢迎任何建议，非常感谢！

Answer 1

LEFT JOIN 版本有效吗？

SELECT mq.*,
      dense_rank() OVER (PARTITION BY mq.email
                         ORDER BY mq.priority_score, comp
                        ) AS r
FROM main_query mq LEFT JOIN
     gm
     ON gm.name = mq.name AND
        gm.event= mq.event AND
        gm.email = mq.email AND
        gm.report_date >= (CURRENT_DATE - 25)::date)
WHERE gm.name IS NULL  
ORDER BY priority_score ASC;

如果这不起作用，它应该像这样工作：

SELECT mq.*,
      dense_rank() OVER (PARTITION BY mq.email
                         ORDER BY mq.priority_score, comp
                        ) AS r
FROM main_query mq LEFT JOIN
     (SELECT gm.*
      FROM gm
      WHERE gm.report_date >= (CURRENT_DATE - 25)::date)
     ) gm
     ON gm.name = mq.name AND
        gm.event= mq.event AND
        gm.email = mq.email
WHERE gm.name IS NULL  
ORDER BY priority_score ASC

由于内部错误，不支持相关子查询模式 - 其中不存在相关子查询

Correlated subquery pattern is not supported due to internal error - where not exists correlated subquery

sql

subquery

sql-optimization

correlated-subquery

amazon-redshift