1998-09-01 17:53:09 +02:00
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<REFENTRY ID="SQL-REVOKE">
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<REFMETA>
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<REFENTRYTITLE>
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REVOKE
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</REFENTRYTITLE>
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<REFMISCINFO>SQL - Language Statements</REFMISCINFO>
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</REFMETA>
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<REFNAMEDIV>
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<REFNAME>
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REVOKE
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</REFNAME>
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<REFPURPOSE>
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Revokes access privilege from a user, a group or all users.
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</REFPURPOSE>
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<REFSYNOPSISDIV>
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<REFSYNOPSISDIVINFO>
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<DATE>1998-09-01</DATE>
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</REFSYNOPSISDIVINFO>
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<SYNOPSIS>
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<REPLACEABLE CLASS="PARAMETER">
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</REPLACEABLE>
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REVOKE <REPLACEABLE CLASS="PARAMETER">privilege</REPLACEABLE> [, ...]
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ON <REPLACEABLE CLASS="PARAMETER">object</REPLACEABLE> [, ...]
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FROM { PUBLIC | GROUP <REPLACEABLE CLASS="PARAMETER">group</REPLACEABLE> | <REPLACEABLE CLASS="PARAMETER">username</REPLACEABLE> }
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</SYNOPSIS>
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<REFSECT2 ID="R2-SQL-REVOKE-1">
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<REFSECT2INFO>
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<DATE>1998-09-01</DATE>
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</REFSECT2INFO>
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<TITLE>
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Inputs
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</TITLE>
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<PARA>
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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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<REPLACEABLE CLASS="PARAMETER">privilege</REPLACEABLE>
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</TERM>
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<LISTITEM>
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<PARA>
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The possible privileges are:
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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SELECT
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</TERM>
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<LISTITEM>
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<PARA>
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Privilege to access all of the columns of a specific
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table/view.
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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<VARLISTENTRY>
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<TERM>
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INSERT
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</TERM>
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<LISTITEM>
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<PARA>
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Privilege to insert data into all columns of a
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specific table.
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<VARLISTENTRY>
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<TERM>
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UPDATE
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</TERM>
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<LISTITEM>
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<PARA>
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Privilege to update all columns of a specific
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table.
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<VARLISTENTRY>
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<TERM>
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DELETE
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</TERM>
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<LISTITEM>
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<PARA>
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Privilege to delete rows from a specific table.
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<VARLISTENTRY>
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<TERM>
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RULE
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</TERM>
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<LISTITEM>
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<PARA>
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Privilege to define rules on table/view.
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(See the <command>CREATE RULE</command> statement).
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<VARLISTENTRY>
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<TERM>
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ALL
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</TERM>
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<LISTITEM>
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<PARA>
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Rescind all privileges.
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</VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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<REPLACEABLE CLASS="PARAMETER">object</REPLACEABLE>
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</TERM>
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<LISTITEM>
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<PARA>
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The name of an object from which to revoke access.
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The possible objects are:
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<simplelist>
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<member>
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table
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<member>
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view
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<member>
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sequence
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<member>
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index
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</simplelist>
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<VARLISTENTRY>
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<TERM>
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<REPLACEABLE CLASS="PARAMETER">group</REPLACEABLE>
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</TERM>
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<LISTITEM>
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<PARA>
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The name of a group from whom to revoke privileges.
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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<VARLISTENTRY>
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<TERM>
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<REPLACEABLE CLASS="PARAMETER">username</REPLACEABLE>
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</TERM>
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<LISTITEM>
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<PARA>
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The name of a user from whom revoke privileges. Use the PUBLIC keyword
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to specify all users.
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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<VARLISTENTRY>
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<TERM>
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PUBLIC
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</TERM>
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<LISTITEM>
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<PARA>
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Rescind the specified privilege(s) for all users.
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</LISTITEM>
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</VARLISTENTRY>
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</VARIABLELIST>
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</REFSECT2>
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<REFSECT2 ID="R2-SQL-REVOKE-2">
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<REFSECT2INFO>
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<DATE>1998-04-15</DATE>
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</REFSECT2INFO>
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<TITLE>
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Outputs
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</TITLE>
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<PARA>
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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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CHANGE
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</TERM>
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<LISTITEM>
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<PARA>
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Message returned if successfully.
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<VARLISTENTRY>
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<TERM>
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ERROR
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</TERM>
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<LISTITEM>
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<PARA>
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Message returned if object is not available or impossible
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to revoke privileges from a group or users.
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</VARIABLELIST>
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</REFSECT2>
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</REFSYNOPSISDIV>
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<REFSECT1 ID="R1-SQL-REVOKE-1">
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<REFSECT1INFO>
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<DATE>1998-09-01</DATE>
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</REFSECT1INFO>
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<TITLE>
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Description
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</TITLE>
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<PARA>
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REVOKE allows creator of an object to revoke permissions granted
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before, from all users (via PUBLIC) or a certain user or group.
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<REFSECT2 ID="R2-SQL-REVOKE-3">
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<REFSECT2INFO>
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<DATE>1998-04-15</DATE>
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</REFSECT2INFO>
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<TITLE>
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Notes
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</TITLE>
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<PARA>
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Refer to psql \z command for further information about permissions
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on existing objects:
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<programlisting>
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Database = lusitania
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+------------------+---------------------------------------------+
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| Relation | Grant/Revoke Permissions |
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+------------------+---------------------------------------------+
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| mytable | {"=rw","miriam=arwR","group todos=rw"} |
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+------------------+---------------------------------------------+
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Legend:
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uname=arwR -- privileges granted to a user
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group gname=arwR -- privileges granted to a GROUP
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=arwR -- privileges granted to PUBLIC
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r -- SELECT
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w -- UPDATE/DELETE
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a -- INSERT
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R -- RULE
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arwR -- ALL
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</programlisting>
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<tip>
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<para>
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Currently, to create a GROUP you have to insert
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data manually into table pg_group as:
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<programlisting>
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INSERT INTO pg_group VALUES ('todos');
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CREATE USER miriam IN GROUP todos;
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</programlisting>
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</tip>
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</REFSECT2>
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<REFSECT1 ID="R1-SQL-REVOKE-2">
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<TITLE>
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Usage
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</TITLE>
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<PARA>
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<ProgramListing>
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-- revoke insert privilege from all users on table films:
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--
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REVOKE INSERT ON films FROM PUBLIC;
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-- revoke all privileges from user manuel on view kinds:
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--
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REVOKE ALL ON kinds FROM manuel;
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</ProgramListing>
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</REFSECT1>
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<REFSECT1 ID="R1-SQL-REVOKE-3">
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<TITLE>
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Compatibility
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</TITLE>
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<PARA>
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</PARA>
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<REFSECT2 ID="R2-SQL-REVOKE-4">
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<REFSECT2INFO>
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<DATE>1998-09-01</DATE>
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</REFSECT2INFO>
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<TITLE>
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SQL92
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</TITLE>
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<PARA>
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The SQL92 syntax for REVOKE has additional capabilities for rescinding
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privileges, including those on individual columns in tables:
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<variablelist>
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<varlistentry>
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<term>
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<synopsis>
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REVOKE { SELECT | DELETE | USAGE | ALL PRIVILEGES } [, ...]
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ON <replaceable class="parameter">object</replaceable>
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FROM { PUBLIC | <replaceable class="parameter">username</replaceable> [, ...] } { RESTRICT | CASCADE }
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REVOKE { INSERT | UPDATE | REFERENCES } [, ...] [ ( <replaceable class="parameter">column</replaceable> [, ...] ) ]
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ON <replaceable class="parameter">object</replaceable>
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FROM { PUBLIC | <replaceable class="parameter">username</replaceable> [, ...] } { RESTRICT | CASCADE }
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</synopsis>
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<listitem>
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<para>
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Refer to the <command>GRANT</command> command for details on individual fields.
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<varlistentry>
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<term>
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<synopsis>
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REVOKE GRANT OPTION FOR <replaceable class="parameter">privilege</replaceable> [, ...]
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ON <replaceable class="parameter">object</replaceable>
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FROM { PUBLIC | <replaceable class="parameter">username</replaceable> [, ...] } { RESTRICT | CASCADE }
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</synopsis>
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<listitem>
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<para>
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Rescinds authority for a user to grant the specified privilege to others.
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Refer to the <command>GRANT</command> command for details on individual fields.
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</variablelist>
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<para>
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The possible objects are:
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<simplelist>
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<member> [ TABLE ] table/view
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<member> CHARACTER SET character-set
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<member> COLLATION collation
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<member> TRANSLATION translation
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<member> DOMAIN domain
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</simplelist>
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<para>
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If user1 gives a privilege WITH GRANT OPTION to user2,
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and user2 gives it to user3 then user1 can revoke
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this privilege in cascade using the CASCADE keyword.
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1998-09-05 08:01:56 +02:00
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<para>
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1998-09-01 17:53:09 +02:00
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If user1 gives a privilege WITH GRANT OPTION to user2,
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and user2 gives it to user3 then if user1 try revoke
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this privilege it fails if he/she specify the RESTRICT
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keyword.
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</REFENTRY>
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<!--
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<REPLACEABLE CLASS="PARAMETER">
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</REPLACEABLE>
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<ReturnValue></ReturnValue>
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<PARA>
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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>•
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</TERM>
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<LISTITEM>
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<PARA>
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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</VARIABLELIST>
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<PARA>
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</PARA>
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-->
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