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How to drop a PostgreSQL database if there are active connections to it?
1、PostgreSQL 9.1 and below:
SELECT pg_terminate_backend(pg_stat_activity.procpid)FROM pg_stat_activityWHERE pg_stat_activity.datname = ‘TARGET_DB‘ AND procpid <> pg_backend_pid();
PostgreSQL 9.2 and above:
SELECT pg_terminate_backend(pg_stat_activity.pid)FROM pg_stat_activityWHERE pg_stat_activity.datname = ‘TARGET_DB‘ AND pid <> pg_backend_pid();
Once you disconnect everyone you will have to disconnect and issue the DROP DATABASE command from a connection from another database aka not the one your trying to drop.
Note the renaming of the procpid column to pid. See this mailing list thread.
pg_backend_pid:Process ID of the server process attached to the current session
2、
#!/usr/bin/env bash# kill all connections to the postgres serverif [ -n "$1" ] ; then where="where pg_stat_activity.datname = ‘$1‘" echo "killing all connections to database ‘$1‘"else echo "killing all connections to database"ficat <<-EOF | psql -U postgres -d postgres SELECT pg_terminate_backend(pg_stat_activity.pid)FROM pg_stat_activity${where}EOF
参考:
http://stackoverflow.com/questions/5408156/how-to-drop-a-postgresql-database-if-there-are-active-connections-to-it
http://www.postgresql.org/docs/9.3/static/functions-info.html
How to drop a PostgreSQL database if there are active connections to it?
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