1SECURITY LABEL(7)        PostgreSQL 15.4 Documentation       SECURITY LABEL(7)
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NAME

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

9       SECURITY LABEL [ FOR provider ] ON
10       {
11         TABLE object_name |
12         COLUMN table_name.column_name |
13         AGGREGATE aggregate_name ( aggregate_signature ) |
14         DATABASE object_name |
15         DOMAIN object_name |
16         EVENT TRIGGER object_name |
17         FOREIGN TABLE object_name
18         FUNCTION function_name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] |
19         LARGE OBJECT large_object_oid |
20         MATERIALIZED VIEW object_name |
21         [ PROCEDURAL ] LANGUAGE object_name |
22         PROCEDURE procedure_name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] |
23         PUBLICATION object_name |
24         ROLE object_name |
25         ROUTINE routine_name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] |
26         SCHEMA object_name |
27         SEQUENCE object_name |
28         SUBSCRIPTION object_name |
29         TABLESPACE object_name |
30         TYPE object_name |
31         VIEW object_name
32       } IS { string_literal | NULL }
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34       where aggregate_signature is:
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36       * |
37       [ argmode ] [ argname ] argtype [ , ... ] |
38       [ [ argmode ] [ argname ] argtype [ , ... ] ] ORDER BY [ argmode ] [ argname ] argtype [ , ... ]
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DESCRIPTION

41       SECURITY LABEL applies a security label to a database object. An
42       arbitrary number of security labels, one per label provider, can be
43       associated with a given database object. Label providers are loadable
44       modules which register themselves by using the function
45       register_label_provider.
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47           Note
48           register_label_provider is not an SQL function; it can only be
49           called from C code loaded into the backend.
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51       The label provider determines whether a given label is valid and
52       whether it is permissible to assign that label to a given object. The
53       meaning of a given label is likewise at the discretion of the label
54       provider.  PostgreSQL places no restrictions on whether or how a label
55       provider must interpret security labels; it merely provides a mechanism
56       for storing them. In practice, this facility is intended to allow
57       integration with label-based mandatory access control (MAC) systems
58       such as SELinux. Such systems make all access control decisions based
59       on object labels, rather than traditional discretionary access control
60       (DAC) concepts such as users and groups.
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PARAMETERS

63       object_name
64       table_name.column_name
65       aggregate_name
66       function_name
67       procedure_name
68       routine_name
69           The name of the object to be labeled. Names of objects that reside
70           in schemas (tables, functions, etc.) can be schema-qualified.
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72       provider
73           The name of the provider with which this label is to be associated.
74           The named provider must be loaded and must consent to the proposed
75           labeling operation. If exactly one provider is loaded, the provider
76           name may be omitted for brevity.
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78       argmode
79           The mode of a function, procedure, or aggregate argument: IN, OUT,
80           INOUT, or VARIADIC. If omitted, the default is IN. Note that
81           SECURITY LABEL does not actually pay any attention to OUT
82           arguments, since only the input arguments are needed to determine
83           the function's identity. So it is sufficient to list the IN, INOUT,
84           and VARIADIC arguments.
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86       argname
87           The name of a function, procedure, or aggregate argument. Note that
88           SECURITY LABEL does not actually pay any attention to argument
89           names, since only the argument data types are needed to determine
90           the function's identity.
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92       argtype
93           The data type of a function, procedure, or aggregate argument.
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95       large_object_oid
96           The OID of the large object.
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98       PROCEDURAL
99           This is a noise word.
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101       string_literal
102           The new setting of the security label, written as a string literal.
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104       NULL
105           Write NULL to drop the security label.
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EXAMPLES

108       The following example shows how the security label of a table could be
109       set or changed:
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111           SECURITY LABEL FOR selinux ON TABLE mytable IS 'system_u:object_r:sepgsql_table_t:s0';
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113       To remove the label:
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115           SECURITY LABEL FOR selinux ON TABLE mytable IS NULL;
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COMPATIBILITY

119       There is no SECURITY LABEL command in the SQL standard.
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SEE ALSO

122       sepgsql, src/test/modules/dummy_seclabel
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126PostgreSQL 15.4                      2023                    SECURITY LABEL(7)
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