Provided by: postgresql-client-9.1_9.1.1-1_i386
SECURITY_LABEL - define or change a security label applied to an object
SECURITY LABEL [ FOR provider ] ON
TABLE object_name |
COLUMN table_name.column_name |
AGGREGATE agg_name (agg_type [, ...] ) |
DOMAIN object_name |
FOREIGN TABLE object_name
FUNCTION function_name ( [ [ argmode ] [ argname ] argtype [, ...] ] ) |
LARGE OBJECT large_object_oid |
[ PROCEDURAL ] LANGUAGE object_name |
SCHEMA object_name |
SEQUENCE object_name |
TYPE object_name |
} IS 'label'
SECURITY LABEL applies a security label to a database object. An
arbitrary number of security labels, one per label provider, can be
associated with a given database object. Label providers are loadable
modules which register themselves by using the function
register_label_provider is not an SQL function; it can only be
called from C code loaded into the backend.
The label provider determines whether a given label is valid and
whether it is permissible to assign that label to a given object. The
meaning of a given label is likewise at the discretion of the label
provider. PostgreSQL places no restrictions on whether or how a label
provider must interpret security labels; it merely provides a mechanism
for storing them. In practice, this facility is intended to allow
integration with label-based mandatory access control (MAC) systems
such as SE-Linux. Such systems make all access control decisions based
on object labels, rather than traditional discretionary access control
(DAC) concepts such as users and groups.
object_name, table_name.column_name, agg_name, function_name
The name of the object to be labeled. Names of tables, aggregates,
domains, foreign tables, functions, sequences, types, and views can
The name of the provider with which this label is to be associated.
The named provider must be loaded and must consent to the proposed
labeling operation. If exactly one provider is loaded, the provider
name may be omitted for brevity.
An input data type on which the aggregate function operates. To
reference a zero-argument aggregate function, write * in place of
the list of input data types.
The mode of a function argument: IN, OUT, INOUT, or VARIADIC. If
omitted, the default is IN. Note that SECURITY LABEL ON FUNCTION
does not actually pay any attention to OUT arguments, since only
the input arguments are needed to determine the function's
identity. So it is sufficient to list the IN, INOUT, and VARIADIC
The name of a function argument. Note that SECURITY LABEL ON
FUNCTION does not actually pay any attention to argument names,
since only the argument data types are needed to determine the
The data type(s) of the function's arguments (optionally
schema-qualified), if any.
The OID of the large object.
This is a noise word.
The new security label, written as a string literal; or NULL to
drop the security label.
The following example shows how the security label of a table might be
SECURITY LABEL FOR selinux ON TABLE mytable IS 'system_u:object_r:sepgsql_table_t:s0';
There is no SECURITY LABEL command in the SQL standard.