PostgreSQL - Rename database

Question

I need to rename the database but when I do in PGAdmin : ALTER DATABASE \"databaseName\" RENAME TO \"databaseNameOld\" it told me that it cannot.

How c

Answer 1

Unexist told me in comment to restart the database and it works! Restarting the database kill all existing connection and then I connect to an other database and was able to rename it with my initial query.

Thx all.