https://wiki.postgresql.org/wiki/PgNotificationHelper
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postgresql/lightdb的notify机制–可靠缓存、MQ消息事务的救星
http://www.light-pg.com/docs/lightdb/13.3-22.2/sql-notify.html http://www.light-pg.com/doc…
http://www.light-pg.com/docs/lightdb/13.3-22.2/sql-notify.html http://www.light-pg.com/doc…