删除Oracle中的所有用户表/序列

Question

作为构建过程和不断发展的数据库的一部分,我正在尝试创建一个脚本,该脚本将删除用户的所有表和序列.我不想重新创建用户,因为这将需要比允许更多的权限.

我的脚本创建了一个删除表/序列的过程,执行过程,然后删除过程.我正在从sqlplus执行该文件:

drop.sql中:

create or replace procedure drop_all_cdi_tables
is
cur integer;
begin
cur:= dbms_sql.OPEN_CURSOR();
for t in (select table_name from user_tables) loop
execute immediate 'drop table ' ||t.table_name|| ' cascade constraints';
end loop;
dbms_sql.close_cursor(cur);

cur:= dbms_sql.OPEN_CURSOR();
for t in (select sequence_name from user_sequences) loop
execute immediate 'drop sequence ' ||t.sequence_name;
end loop;
dbms_sql.close_cursor(cur);
end;
/
execute drop_all_cdi_tables;
/
drop procedure drop_all_cdi_tables;
/

不幸的是,丢弃该过程会导致问题.似乎导致竞争条件,并且程序在执行之前被删除.
例如:

 SQL*Plus: Release 11.1.0.7.0 - Production on Tue Mar 30 18:45:42 2010

 Copyright (c) 1982, 2008, Oracle.  All rights reserved.


 Connected to:
 Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
 With the Partitioning, OLAP, Data Mining and Real Application Testing options


 Procedure created.


 PL/SQL procedure successfully completed.


 Procedure created.


 Procedure dropped.

 drop procedure drop_all_user_tables
 *
 ERROR at line 1:
 ORA-04043: object DROP_ALL_USER_TABLES does not exist


 SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64
 With the Partitioning, OLAP, Data Mining and Real Application Testing options

关于如何使这个工作的任何想法？

Answer 1

如果您不打算保留存储过程,我将使用匿名PLSQL块:

BEGIN

  --Bye Sequences!
  FOR i IN (SELECT us.sequence_name
              FROM USER_SEQUENCES us) LOOP
    EXECUTE IMMEDIATE 'drop sequence '|| i.sequence_name ||'';
  END LOOP;

  --Bye Tables!
  FOR i IN (SELECT ut.table_name
              FROM USER_TABLES ut) LOOP
    EXECUTE IMMEDIATE 'drop table '|| i.table_name ||' CASCADE CONSTRAINTS ';
  END LOOP;

END;

Answer 2

对于SQL语句,末尾的分号将执行该语句./将执行前一个语句.因此,你结束了

drop procedure drop_all_cdi_tables;
/

将删除该程序,然后尝试再次删除它.

如果你查看输出,你会看到'PROCEDURE CREATED',然后执行,然后'PROCEDURE CREATED'再次重新执行最后一个语句(EXECUTE是一个SQL*Plus命令,而不是一个语句所以没有缓冲)然后"程序删除",然后它尝试(并失败)第二次丢弃它.

PS.我同意Dougman关于奇怪的DBMS_SQL调用.

Answer 3

只需运行这两条语句，然后运行所有结果：

select 'drop table ' || table_name || ';' from user_tables;
select 'drop sequence ' || sequence_name || ';' from user_sequences;