Question

我有一个没有表的Oracle模式（我放弃了它们）。当我查看user_constraints表时，无论如何

    SELECT * FROM user_constraints;

我看到了很多行。如何删除这些约束？

    DELETE FROM user_constraints WHERE owner='owner';

没有用，它给了我一个“权限不足”的错误。

    SELECT owner, constraint_name, constraint_type, table_name, r_owner, r_constraint_name  FROM user_constraints;

    OWNER                          CONSTRAINT_NAME                CONSTRAINT_TYPE TABLE_NAME                     R_OWNER                        R_CONSTRAINT_NAME            
    ORA_AI_1_9                     BIN$z2XwnFUHEHrgQ4sGOR4Qeg==$0 P               BIN$z2XwnFUJEHrgQ4sGOR4Qeg==$0                                                               

    ORA_AI_1_9                     BIN$z1NhC6g4oErgQ4sGOR6gSg==$0 P               BIN$z1NhC6g6oErgQ4sGOR6gSg==$0                                                               

    ORA_AI_1_9                     BIN$z1anK5OEEHrgQ4sGOR4Qeg==$0 P               BIN$z1anK5OGEHrgQ4sGOR4Qeg==$0                                                               

    ORA_AI_1_9                     BIN$z1NhC6hhoErgQ4sGOR6gSg==$0 P               BIN$z1NhC6hjoErgQ4sGOR6gSg==$0

Answer 1

你也是10 / 11g，也许有recylebin？

SQL> select count(*) from user_tables;

  COUNT(*)
----------
         0

SQL> select count(*) from user_constraints;

  COUNT(*)
----------
         0

SQL> create table foo(id number primary key);

Table created.

SQL> ALTER SESSION SET recyclebin = ON;

Session altered.

SQL> select count(*) from user_tables;

  COUNT(*)
----------
         1

SQL> select count(*) from user_constraints;

  COUNT(*)
----------
         1

SQL> drop table foo;

Table dropped.

SQL> select count(*) from user_constraints;

  COUNT(*)
----------
         1

SQL> select count(*) from user_tables;

  COUNT(*)
----------
         0

SQL>

你可以清除重新定位以解决这个问题。

SQL> purge recyclebin;

Recyclebin purged.

SQL> select count(*) from user_constraints;

  COUNT(*)
----------
         0

Answer 2

你可以发表DROP TABLE [schema.]table_name [CASCADE CONSTRAINTS]

之类的陈述

Answer 3

首先，您不应该直接针对像user_constraints这样的数据字典表执行DML。

其次，您是否拥有在其他用户拥有的表上创建的约束？什么

SELECT owner, constraint_name, constraint_type, table_name, r_owner, r_constraint_name
  FROM user_constraints

返回？

ORACLE DB user_constraints没有表

3 个答案: