获取ORA-01031:查询表而不是ORA-00942时权限不足:表或视图不存在 [英] Getting ORA-01031: insufficient privileges while querying a table instead of ORA-00942: table or view does not exist

问题描述

从架构A查询架构C中的表时，我得到 ORA-01031:权限不足，而从架构B中查询同一表时，我 ORA-00942:表或视图不存在.在表上，这两个模式都不具有任何特权.为什么在这种情况下我会收到不同的错误消息?

When I'm querying a table in schema C from schema A, I'm getting ORA-01031: insufficient privileges and when I'm querying the same table from schema B, I'm getting ORA-00942: table or view does not exist. On the table neither of the schemas are having any privileges. Why am I getting different error messages in this case?

推荐答案

当您对表具有至少一个特权，但没有必需的特权时，可能会得到ORA-01031: insufficient privileges而不是ORA-00942: table or view does not exist.

You may get ORA-01031: insufficient privileges instead of ORA-00942: table or view does not exist when you have at least one privilege on the table, but not the necessary privilege.

创建架构

SQL> create user schemaA identified by schemaA;

User created.

SQL> create user schemaB identified by schemaB;

User created.

SQL> create user test_user identified by test_user;

User created.

SQL> grant connect to test_user;

Grant succeeded.

创建对象和权限

这是不常见的，但有可能在不授予SELECT的情况下授予模式类似DELETE的特权.

It is unusual, but possible, to grant a schema a privilege like DELETE without granting SELECT.

SQL> create table schemaA.table1(a number);

Table created.

SQL> create table schemaB.table2(a number);

Table created.

SQL> grant delete on schemaB.table2 to test_user;

Grant succeeded.

以TEST_USER身份连接并尝试查询表

这表明在表上具有 some 特权会更改错误消息.

This shows that having some privilege on the table changes the error message.

SQL> select * from schemaA.table1;
select * from schemaA.table1
                      *
ERROR at line 1:
ORA-00942: table or view does not exist


SQL> select * from schemaB.table2;
select * from schemaB.table2
                      *
ERROR at line 1:
ORA-01031: insufficient privileges


SQL>

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