ALTER DATABASE

    Description

    changes the attributes of a database.

    The first form changes the allowed connection limit for a database. Only the database owner or a superuser can change this setting.

    The second and third forms change the session default for a configuration parameter for a Greenplum database. Whenever a new session is subsequently started in that database, the specified value becomes the session default value. The database-specific default overrides whatever setting is present in the server configuration file (postgresql.conf). Only the database owner or a superuser can change the session defaults for a database. Certain parameters cannot be set this way, or can only be set by a superuser.

    The fourth form changes the name of the database. Only the database owner or a superuser can rename a database; non-superuser owners must also have the CREATEDB privilege. You cannot rename the current database. Connect to a different database first.

    The fifth form changes the owner of the database. To alter the owner, you must own the database and also be a direct or indirect member of the new owning role, and you must have the CREATEDB privilege. (Note that superusers have all these privileges automatically.)

    name

    connlimit

    The maximum number of concurrent connections possible. The default of -1 means there is no limitation.

    parameter value

    Set this database’s session default for the specified configuration parameter to the given value. If value is or, equivalently, RESET is used, the database-specific setting is removed, so the system-wide default setting will be inherited in new sessions. Use RESET ALL to clear all database-specific settings. See for information about server parameters. for information about all user-settable configuration parameters.

    newname

    The new name of the database.

    The new owner of the database.

    Notes

    It is also possible to set a configuration parameter session default for a specific role (user) rather than to a database. Role-specific settings override database-specific ones if there is a conflict. See ALTER ROLE.

    To set the default schema search path for the database:

    1. ALTER DATABASE mydatabase SET search_path TO myschema,

    Compatibility

    The ALTER DATABASE statement is a Greenplum Database extension.

    CREATE DATABASE, , SET

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