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                [TOC] # FLASHBACK TENANT ## 描述 該語句用于從回收站中恢復被刪除的租戶。 ## 前置條件 回收站需要處于開啟狀態,可以通過`show variables like 'recyclebin';`來查看回收站是否開啟。 ~~~ OceanBase(admin@test)> show variables like 'recyclebin'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | recyclebin | ON | +---------------+-------+ 1 row in set (0.00 sec) ~~~ 如果回收站處于關閉狀態,可以通過`set recyclebin = on;`來開啟。回收站中的表沒有被實際刪除,仍然會占用資源,如果需要徹底刪除,可以執行`purge recyclebin;` ## 格式 ~~~ FLASHBACK TENANT tenant_name TO BEFORE DROP [RENAME to new_tenant_name]; ~~~ ## 參數解釋? <table cols="2" id="table-xd9-oa7-03g" class="table"><colgroup colname="col1" colnum="1" colwidth="1*" id="colgroup-rrz-56d-o5e" style="width:50%"></colgroup><colgroup colname="col2" colnum="2" colwidth="1*" id="colgroup-zng-nxe-czx" style="width:50%"></colgroup><thead id="thead-o12-5gw-rp6" class="thead"><tr id="tr-ldd-wd6-amz"><th id="td-zgm-l3u-2xo"><p id="p-215-ft8-ofr">參數</p></th><th id="td-3t5-lcv-yy2"><p id="p-ie9-8oo-who">解釋</p></th></tr></thead><tbody id="tbody-pgx-4ug-0ct" class="tbody"><tr id="tr-jt9-fdw-f6q"><td namest="col1" nameend="col1" morerows="0" id="td-myw-w1v-8qb"><p id="p-h0k-vht-cmx">tenant_name</p></td><td id="td-n6y-fmi-zcu"><p id="p-9uu-fq1-0h4">指定要恢復的租戶名。可以使用原始租戶名,也可以使用在回收站中的名字。回收站中的名字具有唯一性,可以指定確定的租戶;原始租戶名可能會重復,此時恢復的是最晚進入回收站的租戶。</p></td></tr><tr id="tr-3i9-fhw-5gx"><td namest="col1" nameend="col1" morerows="0" id="td-aju-l0i-9p2"><p id="p-zin-sk0-nwx">new_tenant_name</p></td><td id="td-8j8-4x7-8sb"><p id="p-k6s-kdz-51t">將恢復后的租戶重新命名。</p></td></tr></tbody></table> ## 示例 * 從回收站中恢復被刪除的租戶tenant1。 ~~~ obclient> flashback tenant tenant1 to before drop; Query OK, 0 rows affected (0.01 sec) ~~~
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