I need exclusive access to a database. Is it possible using an SQL command to "detach" all other users from a postgres database. Or maybe closing all other connections and then gaining exclusive access.
This is for unit testing, and tests are only run manually, so there is no danger involved. Only old dead connections will be affected.
There are no other users connecting to these unittest databases.
The old dead connections come from developing. This happens all the time when a test that is being written or fails does not exit clean.
If someone also needs to keep locked out other users for a while after disconnecting them in a production scenario, see Scott Marlowe's answer below: http://dba.stackexchange.com/a/6184/2024
See also this similar question on dba: How to drop all connections to a specific database in postgres without stopping the server?