Postgresql查询删除所有行

Question

我在带有 using 子句、left join 和 where 子句的 PostgreSQL 函数中编写了一个简单的 delete 查询。但是查询没有考虑 where 条件。它删除所有行。

我写了两种类型的查询都产生相同的结果

查询 1

delete from "StockInfos" using "StockInfos" as si
    left outer join "PurchaseOrderInfos" as poi on poi."Id" = si."PurchaseOrderInfoId"
    left outer join "ReceivingInfos" as ri on ri."PurchaseOrderInfoId" = poi."Id"
 where ri."Id" = (delete_data->>'Id')::bigint;

查询 2

delete from "StockInfos" where exists (
            select * from "StockInfos" as si
                left join "PurchaseOrderInfos" as poi on poi."Id" = si."PurchaseOrderInfoId"
                left outer join "ReceivingInfos" as ri on ri."PurchaseOrderInfoId" = poi."Id"
            where ri."Id" = (delete_data->>'Id')::bigint
        );

我不明白这是什么问题。谁能告诉我出了什么问题？

Answer 1

我会用相关的子查询来重新表述。这使逻辑更清晰，并且应该做你想做的事：

delete from "StockInfos" si
where exists (
    select 1
    from "PurchaseOrderInfos" poi
    inner join "ReceivingInfos" as ri on ri."PurchaseOrderInfoId" = poi."Id"
    where 
        oi."Id" = si."PurchaseOrderInfoId"
        and ri."Id" = (si.delete_data->>'Id')::bigint

)

Postgresql查询删除所有行

Postgresql query deletes all rows

postgresql

sql-delete