Provided by: postgresql-client-9.1_9.1.1-1_i386 bug

NAME

       SECURITY_LABEL - define or change a security label applied to an object

SYNOPSIS

       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 |
         VIEW object_name
       } IS 'label'

DESCRIPTION

       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.

           Note
           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.

PARAMETERS

       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
           be schema-qualified.

       provider
           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.

       arg_type
           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.

       argmode
           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
           arguments.

       argname
           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
           function's identity.

       argtype
           The data type(s) of the function's arguments (optionally
           schema-qualified), if any.

       large_object_oid
           The OID of the large object.

       PROCEDURAL
           This is a noise word.

       label
           The new security label, written as a string literal; or NULL to
           drop the security label.

EXAMPLES

       The following example shows how the security label of a table might be
       changed.

           SECURITY LABEL FOR selinux ON TABLE mytable IS 'system_u:object_r:sepgsql_table_t:s0';

COMPATIBILITY

       There is no SECURITY LABEL command in the SQL standard.

SEE ALSO

       sepgsql, dummy_seclabel