云数据库 GAUSSDB-闪回表:使用示例

时间：2024-11-13 10:04:56

云数据库 GAUSSDB

使用示例

gaussdb=# DROP TABLE IF EXISTS "public".flashtest;
NOTICE:  table "flashtest" does not exist, skipping
DROP TABLE
--创建表
gaussdb=# CREATE TABLE "public".flashtest (col1 INT,col2 TEXT) with(storage_type=ustore);
NOTICE:  The 'DISTRIBUTE BY' clause is not specified. Using 'col1' as the distribution column by default.
HINT:  Please use 'DISTRIBUTE BY' clause to specify suitable data distribution column.
CREATE TABLE
--查询csn
gaussdb=# SELECT int8in(xidout(next_csn)) FROM gs_get_next_xid_csn();
  int8in  
----------
 79352065
 79352065
 79352065
 79352065
 79352065
 79352065
(6 rows)
--查询当前的时间戳
gaussdb=# SELECT now();
              now              
-------------------------------
 2023-09-13 19:46:34.102863+08
(1 row)
--查看表flashtest
gaussdb=# SELECT * FROM flashtest;
 col1 | col2 
------+------
(0 rows)
--插入数据
gaussdb=# INSERT INTO flashtest VALUES(1,'INSERT1'),(2,'INSERT2'),(3,'INSERT3'),(4,'INSERT4'),(5,'INSERT5'),(6,'INSERT6');
INSERT 0 6
gaussdb=# SELECT * FROM flashtest;
 col1 |  col2   
------+---------
    3 | INSERT3
    1 | INSERT1
    2 | INSERT2
    4 | INSERT4
    5 | INSERT5
    6 | INSERT6
(6 rows)
--闪回表至特定csn
gaussdb=# TIMECAPSULE TABLE flashtest TO  CS N 79352065;
TimeCapsule Table
gaussdb=# SELECT * FROM flashtest;
 col1 | col2 
------+------
(0 rows)
gaussdb=# SELECT now();
              now              
-------------------------------
 2023-09-13 19:52:21.551028+08
(1 row)
--插入数据
gaussdb=# INSERT INTO flashtest VALUES(1,'INSERT1'),(2,'INSERT2'),(3,'INSERT3'),(4,'INSERT4'),(5,'INSERT5'),(6,'INSERT6');
INSERT 0 6
gaussdb=# SELECT * FROM flashtest;
 col1 |  col2   
------+---------
    3 | INSERT3
    6 | INSERT6
    1 | INSERT1
    2 | INSERT2
    4 | INSERT4
    5 | INSERT5
(6 rows)
--闪回表至特定的时间戳
gaussdb=# TIMECAPSULE TABLE flashtest TO TIMESTAMP to_timestamp ('2023-09-13 19:52:21.551028', 'YYYY-MM-DD HH24:MI:SS.FF');
TimeCapsule Table
gaussdb=# SELECT * FROM flashtest;
 col1 | col2 
------+------
(0 rows)
gaussdb=# select now();
              now              
-------------------------------
 2023-09-13 19:54:00.641506+08
(1 row)
--插入数据
gaussdb=# INSERT INTO flashtest VALUES(1,'INSERT1'),(2,'INSERT2'),(3,'INSERT3'),(4,'INSERT4'),(5,'INSERT5'),(6,'INSERT6');
INSERT 0 6
gaussdb=# SELECT * FROM flashtest;
 col1 |  col2   
------+---------
    3 | INSERT3
    6 | INSERT6
    1 | INSERT1
    2 | INSERT2
    4 | INSERT4
    5 | INSERT5
(6 rows)
--闪回表至特定的时间戳
gaussdb=# TIMECAPSULE TABLE flashtest TO TIMESTAMP '2023-09-13 19:54:00.641506';
TimeCapsule Table
gaussdb=# SELECT * FROM flashtest;
 col1 | col2 
------+------
(0 rows)
gaussdb=# DROP TABLE IF EXISTS "public".flashtest;
DROP TABLE

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