oracle - ORA-06508 : PL/SQL: could not find program unit being called

Question

我正在使用 oracle 10g 和 toad 11.5。我正在尝试从匿名 block 调用 api。
如果我在添加 dbms_output.put_line 后重新编译 api然后尝试执行匿名 block ，它显示错误为:

"ORA-06508: PL/SQL: could not find program unit being called".

但是，如果我结束当前 session 并打开一个新 session ，那么匿名 block 将在没有错误的情况下执行。
由于这个问题，每次我对 API 进行更改时，我都会重新连接 session 。
如果可以通过在 toad 或数据库级别进行任何配置来解决此问题，任何人都可以提供帮助。

Answer 1

我怀疑你只报告堆栈中的最后一个错误，如下所示:

ORA-04068: existing state of packages has been discarded
ORA-04061: existing state of package body "schema.package" has been invalidated
ORA-04065: not executed, altered or dropped package body "schema.package"
ORA-06508: PL/SQL: could not find program unit being called: "schema.package"

如果是这样，那是因为 your package is stateful :

The values of the variables, constants, and cursors that a package declares (in either its specification or body) comprise its package state. If a PL/SQL package declares at least one variable, constant, or cursor, then the package is stateful; otherwise, it is stateless.

当您重新编译时，状态会丢失:

If the body of an instantiated, stateful package is recompiled (either explicitly, with the "ALTER PACKAGE Statement", or implicitly), the next invocation of a subprogram in the package causes Oracle Database to discard the existing package state and raise the exception ORA-04068.

After PL/SQL raises the exception, a reference to the package causes Oracle Database to re-instantiate the package, which re-initializes it...

如果你的包有状态，你就无法避免这种情况。我认为真正需要有状态的包是相当罕见的，所以你应该重新访问你在包中声明的任何东西，但在函数或过程之外，看看它是否真的需要在那个级别。由于您使用的是 10g，因此其中包括常量，而不仅仅是变量和游标。

但是引用文档的最后一段意味着下次您在同一 session 中引用该包时，您将不会收到错误并且它将正常工作(直到您再次重新编译)。