我有一个Oracle包,其输入参数为开始日期sysdate-365,结束日期为sysdate + 90.它找到从sysdate-365到sysdate + 90的每个日期,这是455天,然后它为每个日期循环,从主表中获取记录再次循环基于主表数据,从其他表获取值,做一些逻辑并插入工作台.完成需要10个多小时.
我想过使用dbms_scheduler来运行包并行,因为DBA不建议这样做.任何人都可以建议任何其他方式来提高性能？
代码段:
loop for date range
select some_data from master_table where master_date = cursor.date;
loop for
select other_data from other_table where other_date = cursor.date
start with some_data
connect by other_parent = prior other_child;
select count(*) into v1cnt from third_table where third_date = cursor.date and third_data=other_data;
if v1cnt > 0 then
select third_data into variable1 from third_table where third_date = cursor.date and third_data=other_data;
else
variable1 = null;
end if;
select count(*) into v2cnt from fourth_table where …