sql - Oracle PL/SQL, how to debug a complex stored proc?

Question

In the Oracle PL/SQL, how to debug a complex stored proc ?

for example, the codes below, it is using loop + correlated subquery. how to fully understand it ? I have learned that the best way to debug is divide-and-conquer, then how to cut this coding into small pieces ?

Thanks

v_count := 1;

while v_count > 0
LOOP

update tbl_A a
set a.name = (select b.name from tbl_B b where a.id = b.id)
where a.id = (
    select c.id from tbl_C c where c.id = a.id
)

v_count := sql%rowcount;
END LOOP

Answer 1

你没有说你正在使用什么工具，但如果你获得了 Oracle SQL Developer，它包括一个调试器，允许你逐行执行代码、设置断点等等——所有典型的调试功能图形用户界面。

而且，它是免费的。在这里得到它。

Answer 2

尝试注释掉部分代码，然后将到目前为止的结果存储在一个变量中。然后你可以像这样选择它：SELECT @varname至少 MYSQL 5.x 是这样处理它的。