postgreSQL 如何使用 dblink

SELECT
b.id, flow_name, user_id,u.name
FROM
bpm_form_info b
JOIN
vrms_user u on b.user_id=u.id

dblink

SELECT
b.id, flow_name, user_id,u.name
FROM
bpm_form_info b
– vrms_user u on b.user_id=u.id
JOIN
dblink(
‘dbname=user_db user=postgres password=Ws@199612’,
‘SELECT id, name FROM vrms_user’
) AS u (id integer,name varchar ) on b.user_id=u.id