71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
闪回被删除的表
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============================
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OceanBase 支持回收站功能，通过回收站可以闪回已删除的表。默认回收站是开启的，回收站是否开启由租户变量 recyclebin 控制。
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开启/关闭回收站的语法是：
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```javascript
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set global recyclebin = ON | OFF ;
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```
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修改回收站的开启状态后，只对后续新连接会话生效。
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* 示例：闪回被删除的表。
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```javascript
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obclient> drop table if exists t1;
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Query OK, 0 rows affected (0.02 sec)
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obclient> create table t1(id bigint not null primary key, gmt_create datetime not null default current_timestamp);
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Query OK, 0 rows affected (0.09 sec)
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obclient> insert into t1(id) values(1),(2),(3);
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Query OK, 3 rows affected (0.02 sec)
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Records: 3 Duplicates: 0 Warnings: 0
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obclient> select * from t1;
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+----+---------------------+
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| ID | GMT_CREATE |
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+----+---------------------+
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| 1 | 2020-02-28 09:47:07 |
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| 2 | 2020-02-28 09:47:07 |
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| 3 | 2020-02-28 09:47:07 |
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+----+---------------------+
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3 rows in set (0.00 sec)
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obclient> drop table t1;
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Query OK, 0 rows affected (0.03 sec)
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obclient> show recyclebin\G
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*************************** 1. row ***************************
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OBJECT_NAME: __recycle_$_20200102_1585650066255592
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ORIGINAL_NAME: t1
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TYPE: TABLE
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CREATETIME: 2020-03-31 18:21:06.255716
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1 row in set (0.03 sec)
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obclient> flashback table __recycle_$_20200102_1585650066255592 to before drop rename to t1;
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Query OK, 0 rows affected (0.02 sec)
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obclient> select * from t1;
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+----+---------------------+
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| ID | GMT_CREATE |
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+----+---------------------+
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| 1 | 2020-02-28 09:47:07 |
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| 2 | 2020-02-28 09:47:07 |
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| 3 | 2020-02-28 09:47:07 |
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+----+---------------------+
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```
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