postgresql notify

Using PostgreSQL to push messages to the client#listen Message_channel;Notify Message_channel, ' Hello Todd ';Jdbc:Statement stmt = Conn.createstatement ();Stmt.execute ("LISTEN message_channel");Stmt.close ();notifications = Conn.getnotifications ()

As we all know, relational data types have always been one of SQL's criticism. With the increasing variety of data, the conversion from various data types to relational data types has plagued most SQL database users. However, the advantages of SQL

People who are used to C ++ development may prefer to use the c ++ library to access PostgreSQL. Libpqxx was launched a long time ago. It is now in version 4.0. This article briefly introduces People who are used to C ++ development may prefer to

    Author: He WeipingSource:Http://www.pgsqldb.org/mwiki/index.php/Pgbouncer%E6%90%AD%E5%BB%BA%E6%95%B0%E6%8D% AE %E5%BA%93%E8%BF%9E%E6%8E%A5%E6%B1%A0        Recently, we have used PostgreSQL for backend databases in some projects. Due to the need

Our current PostgreSQL is a master-slave streaming replication mode, standby no external service, only as a hot spare. Machine Environment Description:Postgres version 10Topological relationship prior to switchover:master:10.0.20.25standby:10.0.20.26

1. IntroductionPeople who are used to c ++ development may prefer to use the c ++ library to access PG. Libpqxx was launched a long time ago. It is now in version 4.0. This article briefly introduces how to use it. compiling on the linux platform is

Background PostgreSQL 9.6 Dynamic View pg_stat_activity new Wait_event_type, wait_event wait event display. When the session is in a waiting state, wait_event and Wait_event_type are Non-null, indicating the type the session is waiting for.

DNS configuration in Fedora8-general Linux technology-Linux technology and application information. For details, refer to the following section. In order to differentiate each host in the network, a unique address must be assigned to each host. This

Yum-y install PostgreSQL postgresql-libs postgresql-Server Service PostgreSQL start Set to bootChkconfig PostgreSQL on Then modify the settings of/var/lib/pgsql/data/pg_assist.conf: #"Local" Is ForUNIX domain socket connections only# Local

Client Authentication is performed by a configuration file (usually namedPg_mirror.confIt is stored in the data directory of the Database Cluster. HbA indicates "host-based authentication", that is, host-based authentication. InInitdbWhen