--开启事务。
openGauss=# START TRANSACTION;
--创建一个with hold游标。
openGauss=# DECLARE cursor1 CURSOR WITH HOLD FOR SELECT * FROM customer_t1;
--抓取头2行到游标cursor1里。
openGauss=# FETCH FORWARD 2 FROM cursor1;
c_customer_sk | c_customer_id | c_first_name | c_last_name | amount
---------------+---------------+--------------+-------------+--------
3769 | | Grace | |
3769 | hello | | |
(2 rows)
--结束事务。
openGauss=# END;
COMMIT
--抓取下一行到游标cursor1里。
openGauss=# FETCH FORWARD 1 FROM cursor1;
c_customer_sk | c_customer_id | c_first_name | c_last_name | amount
---------------+---------------+--------------+-------------+--------
6885 | maps | Joes | | 2200
(1 row)
--关闭游标。
openGauss=# CLOSE cursor1;
CLOSE CURSOR