Question

我使用FOR loop进行了这个PostgreSQL简单插入查询。它需要某个帐户的资产并转移并将其传递给一个函数，该函数的结果将被插入表中。

我想使用set操作而不是FOR loop来优化此查询。

这是当前的代码。

for assetsloop in select * from "Assets" "a" where "a"."AccountId" = _accountid LOOP

          for shiftsloop in select * from temp_table_shifts LOOP

                 insert into temp_table_ignvalues
                 select * from public."GetIgnitionsOrMovements"(
                              shiftsloop.id::uuid,
                              assetsloop.id::uuid,
                               shiftsloop.startDateTime::timestamptz,
                        shiftsloop.stopDateTime::timestamptz,
                              shiftsloop.description::varchar
                       );
          end LOOP;

   end LOOP;

我尝试过以下

for assetsloop in select * from "Assets" "a" where "a"."AccountId" = _accountid LOOP

                                            WITH op1 AS (
                                               SELECT * from temp_table_shifts
                                               --RETURNING id, startDateTime, stopDateTime, description
                                            )

                               insert into temp_table_ignvalues
                               select * from public."GetIgnitionsOrMovements"(
                                                                           (select op1.id::uuid from op1),
                                                                            assetsloop.id::uuid,
                                                                            (select op1.startDateTime::timestamptz from op1),
                                                           (select op1.stopDateTime::timestamptz from op1),
                                                                           (select op1.description::varchar from op1)
                                                            );
            end LOOP;

但我可以错误地说子查询返回多行。谢谢你的帮助

使用set操作调整postgres查询的性能

0 个答案: