oracle 10g pl/sql 有条件的循环选择

Question

在 10g 的 PL/SQL 中可以做这样的事情吗？

if user_is_goat = 1 then
  for item_rec in (select * from pricing_for_goats)
else 
  for item_rec in (select * from pricing_for_non_goats)
end if;
loop
.
.
end loop;

似乎当 oracle 看到“for rec in select * from dual”时，它期望“循环”立即跟随。我在循环中的代码很多行，我不想维护它的 2 个副本。

Answer 1

试试下面的查询，这将检查变量user_is_goat = 1是否从for_goats返回数据，否则它将从for_non_goats返回

for item_rec in 
(
  select * from pricing_for_goats where user_is_goat = 1
  union
  select * from pricing_for_non_goats where user_is_goat <> 1
)
loop
.....
.....
end loop;