如何使用dblink进行更新？

Question

有没有办法使用dblink从server1/database2的另一个表中使用server2/database2的值来更新一列？

Answer 1

可能有更好的解决方案，但同时你可以试试这个。

SELECT INTO DUMMY dblink_connect('host=localhost port=5432 dbname=DBNAME 
            user=USERNAME password=PASSWORD');   
SELECT INTO DUMMY dblink_open('PARAMS', 'SELECT VALUE FROM TABLE'); 
LOOP 
    SELECT INTO ONE_PARAM RES.VALUE 
    FROM (
     SELECT * FROM dblink_fetch(''PARAMS'', 1) AS (VALUE VARCHAR(100))) RES; 
     EXIT WHEN NOT FOUND; 
     /*DO UPDATE HERE*/ 
END LOOP; 
SELECT INTO DUMMY dblink_close(''PARAMS'');