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GRANT(5)
NAME
  GRANT - define access privileges

SYNOPSIS
  GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER } [,...] | ALL [ PRIVILEGES ] }
      ON [ TABLE ] objectname [, ...]
      TO { username | GROUP groupname | PUBLIC } [, ...]

DESCRIPTION
  The GRANT command gives specific permissions on an object (table, view,
  sequence) to one or more users or groups of users.  These permissions are
  added to those already granted, if any.

  The key word PUBLIC indicates that the privileges are to be granted to all
  users, including those that may be created later. PUBLIC may be thought of
  as an implicitly defined group that always includes all users.  Note that
  any particular user will have the sum of privileges granted directly to
  him, privileges granted to any group he is presently a member of, and
  privileges granted to PUBLIC.

  Users other than the creator of an object do not have any access privileges
  to the object unless the creator grants permissions.	There is no need to
  grant privileges to the creator of an object, as the creator automatically
  holds all privileges.	 (The creator could, however, choose to revoke some
  of his own privileges for safety. Note that the ability to grant and revoke
  privileges is inherent in the creator and cannot be lost. The right to drop
  the object is likewise inherent in the creator, and cannot be granted or
  revoked.)

  The possible privileges are:

  SELECT
       Allows SELECT [select(5)] from any column of the specified table,
       view, or sequence. Also allows the use of COPY [copy(5)] FROM.

  INSERT
       Allows INSERT [insert(5)] of a new row into the specified table. Also
       allows COPY [copy(5)] TO.

  UPDATE
       Allows UPDATE [update(5)] of any column of the specified table. SELECT
       ... FOR UPDATE also requires this privilege (besides the SELECT
       privilege). For sequences, this privilege allows the use of nextval,
       currval and setval.

  DELETE
       Allows DELETE [delete(5)] of a row from the specified table.

  RULE Allows the creation of a rule on the table/view. (See CREATE RULE
       [create_rule(5)] statement.)

  REFERENCES
       To create a table with a foreign key constraint, it is necessary to
       have this privilege on the table with the referenced key.

  TRIGGER
       Allows the creation of a trigger on the specified table. (See CREATE
       TRIGGER [create_trigger(5)] statement.)

  ALL PRIVILEGES
       Grant all of the above privileges at once. The PRIVILEGES key word is
       optional in PostgreSQL, though it is required by strict SQL.

  The privileges required by other commands are listed on the reference page
  of the respective command.

NOTES
  It should be noted that database superusers can access all objects
  regardless of object privilege settings. This is comparable to the rights
  of root in a Unix system.  As with root, it's unwise to operate as a
  superuser except when absolutely necessary.

  Currently, to grant privileges in PostgreSQL to only a few columns, you
  must create a view having the desired columns and then grant privileges to
  that view.

  Use psql(1)'s \z command to obtain information about privileges on existing
  objects:

	    Database	= lusitania
     +------------------+---------------------------------------------+
     |	Relation	|	 Grant/Revoke Permissions	      |
     +------------------+---------------------------------------------+
     | mytable		| {"=rw","miriam=arwdRxt","group todos=rw"}   |
     +------------------+---------------------------------------------+
     Legend:
	   uname=arwR -- privileges granted to a user
     group gname=arwR -- privileges granted to a group
		=arwR -- privileges granted to PUBLIC

		    r -- SELECT ("read")
		    w -- UPDATE ("write")
		    a -- INSERT ("append")
		    d -- DELETE
		    R -- RULE
		    x -- REFERENCES
		    t -- TRIGGER
	      arwdRxt -- ALL PRIVILEGES

  The REVOKE [revoke(5)] command is used to revoke access privileges.

EXAMPLES
  Grant insert privilege to all users on table films:

  GRANT INSERT ON films TO PUBLIC;

  Grant all privileges to user manuel on view kinds:

  GRANT ALL PRIVILEGES ON kinds TO manuel;

COMPATIBILITY
  SQL92

  The PRIVILEGES key word in ALL PRIVILEGES is required. SQL does not support
  setting the privileges on more than one table per command.

  The SQL92 syntax for GRANT allows setting privileges for individual columns
  within a table, and allows setting a privilege to grant the same privileges
  to others:

  GRANT privilege [, ...]
      ON object [ ( column [, ...] ) ] [, ...]
      TO { PUBLIC | username [, ...] } [ WITH GRANT OPTION ]

  SQL allows to grant the USAGE privilege on other kinds of objects:
  CHARACTER SET, COLLATION, TRANSLATION, DOMAIN.

  The TRIGGER privilege was introduced in SQL99. The RULE privilege is a
  PostgreSQL extension.

SEE ALSO
  revoke(5)

Index for Section 5

Alphabetical listing for G

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