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DROP OPERATOR FAMILY
Compatibility
There is no
DROP OPERATOR FAMILY
statement in the SQL standard.
See Also
ALTER OPERATOR FAMILY, CREATE OPERATOR FAMILY, ALTER OPERATOR CLASS,
CREATE OPERATOR CLASS, DROP OPERATOR CLASS
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DROP OWNED
Name
DROP OWNED — remove database objects owned by a database role
Synopsis
DROP OWNED BY
name
[, ...] [ CASCADE | RESTRICT ]
Description
DROP OWNED
drops all the objects within the current database that are owned by one of the specified
roles. Any privileges granted to thegivenroles onobjects in the currentdatabaseandonsharedobjects
(databases, tablespaces) will also be revoked.
Parameters
name
The name of a role whose objects will be dropped, and whose privileges will be revoked.
CASCADE
Automatically drop objects that depend on the affected objects.
RESTRICT
Refuse to drop the objects owned by a role if any other database objects depend on one of the
affected objects. This is the default.
Notes
DROP OWNED
is often used to prepare for the removal of one or more roles. Because
DROP OWNED
only affects the objects in the current database, it is usually necessary to execute this command in
each database that contains objects owned by a role that is to be removed.
Using the
CASCADE
option might make the command recurse to objects owned by other users.
The REASSIGN OWNED command is an alternative that reassigns the ownership of all the database
objects owned by one or more roles. However,
REASSIGN OWNED
does not deal with privileges for
other objects.
Databases and tablespaces owned by the role(s) will not be removed.
See Section 20.4 for more discussion.
Compatibility
The
DROP OWNED
command is a PostgreSQL extension.
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DROP OWNED
See Also
REASSIGN OWNED, DROP ROLE
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DROP ROLE
Name
DROP ROLE — remove a database role
Synopsis
DROP ROLE [ IF EXISTS ]
name
[, ...]
Description
DROP ROLE
removes the specified role(s). Todrop asuperuser role, you must be a superuser yourself;
to drop non-superuser roles, you must have
CREATEROLE
privilege.
Arole cannot be removed if it is still referenced in any database of the cluster; an error will be raised
if so. Before dropping the role, you must drop all the objects it owns (or reassign their ownership)
and revoke any privileges the role has been granted on other objects. The REASSIGN OWNED and
DROP OWNED commands can be useful for this purpose; see Section 20.4 for more discussion.
However, it is not necessary to remove role memberships involving the role;
DROP ROLE
automati-
cally revokes any memberships of the target role in other roles, and of other roles in the target role.
The other roles are not dropped nor otherwise affected.
Parameters
IF EXISTS
Do not throw an error if the role does not exist. A notice is issued in this case.
name
The name of the role to remove.
Notes
PostgreSQL includes a program dropuser that has the same functionality as this command (in fact, it
calls this command) but can be run from the command shell.
Examples
To drop a role:
DROP ROLE jonathan;
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DROP ROLE
Compatibility
The SQL standard defines
DROP ROLE
,but it allows only one role to be dropped at a time, and it
specifies different privilege requirements than PostgreSQL uses.
See Also
CREATE ROLE, ALTER ROLE, SET ROLE
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DROP RULE
Name
DROP RULE — remove a rewrite rule
Synopsis
DROP RULE [ IF EXISTS ]
name
ON
table_name
[ CASCADE | RESTRICT ]
Description
DROP RULE
drops a rewrite rule.
Parameters
IF EXISTS
Do not throw an error if the rule does not exist. A notice is issued in this case.
name
The name of the rule to drop.
table_name
The name (optionally schema-qualified) of the table or viewthat the rule applies to.
CASCADE
Automatically drop objects that depend on the rule.
RESTRICT
Refuse to drop the rule if any objects depend on it. This is the default.
Examples
To drop the rewrite rule
newrule
:
DROP RULE newrule ON mytable;
Compatibility
DROP RULE
is a PostgreSQL language extension, as is the entire query rewrite system.
1493
DROP RULE
See Also
CREATE RULE, ALTER RULE
1494
DROP SCHEMA
Name
DROP SCHEMA — remove a schema
Synopsis
DROP SCHEMA [ IF EXISTS ]
name
[, ...] [ CASCADE | RESTRICT ]
Description
DROP SCHEMA
removes schemas from the database.
Aschema can only be dropped by its owner or a superuser. Note that the owner can drop the schema
(and therebyall contained objects) even if he does not own some of the objects within the schema.
Parameters
IF EXISTS
Do not throw an error if the schema does not exist. A notice is issued in this case.
name
The name of a schema.
CASCADE
Automatically drop objects (tables, functions, etc.) that are contained in the schema.
RESTRICT
Refuse to drop the schema if it contains any objects. This is the default.
Examples
To remove schema
mystuff
from the database, along with everything it contains:
DROP SCHEMA mystuff CASCADE;
Compatibility
DROP SCHEMA
is fully conforming with the SQL standard, except that the standard only allows one
schema to be dropped per command, and apart from the
IF EXISTS
option, which is a PostgreSQL
extension.
1495
DROP SCHEMA
See Also
ALTER SCHEMA, CREATE SCHEMA
1496
DROP SEQUENCE
Name
DROP SEQUENCE — remove a sequence
Synopsis
DROP SEQUENCE [ IF EXISTS ]
name
[, ...] [ CASCADE | RESTRICT ]
Description
DROP SEQUENCE
removes sequence number generators. Asequencecanonly be droppedbyits owner
or a superuser.
Parameters
IF EXISTS
Do not throw an error if the sequence does not exist. A notice is issued in this case.
name
The name (optionally schema-qualified) of a sequence.
CASCADE
Automatically drop objects that depend on the sequence.
RESTRICT
Refuse to drop the sequence if any objects depend on it. This is the default.
Examples
To remove the sequence
serial
:
DROP SEQUENCE serial;
Compatibility
DROP SEQUENCE
conforms to the SQL standard, except thatthestandardonly allows one sequence to
be dropped per command, and apart from the
IF EXISTS
option, which is a PostgreSQL extension.
See Also
CREATE SEQUENCE, ALTER SEQUENCE
1497
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