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211 lines
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HTML
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<meta name="dc.date" scheme="iso8601" content="2005-09-19" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="keywords" content="REVOKE (Table or View Privileges) statement,
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REVOKE (Table or View Privileges), SQL statements, ALL PRIVILEGES clause,
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ALL clause, ALTER clause, DELETE clause, INDEX clause, INSERT clause,
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REFERENCES clause, SELECT clause, UPDATE clause, ON TABLE clause,
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in REVOKE (Table or View Privileges) statement, table-name, view-name,
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FROM clause, authorization-name, PUBLIC clause" />
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<title>REVOKE (Table or View Privileges)</title>
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<link rel="stylesheet" type="text/css" href="ic.css" />
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="revoket"></a>
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<h2 id="revoket"><a href="rbafzmst02.htm#ToC_1247">REVOKE (Table or View Privileges)</a></h2><a id="idx3068" name="idx3068"></a><a id="idx3069" name="idx3069"></a>
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<a name="revokt"></a>
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<p id="revokt">This form of the REVOKE statement removes privileges on a table
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or view.</p>
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<a name="wq1706"></a>
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<h3 id="wq1706"><a href="rbafzmst02.htm#ToC_1248">Invocation</a></h3>
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<p>This statement can be embedded in an application program or issued interactively.
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It is an executable statement that can be dynamically prepared.</p>
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<a name="wq1707"></a>
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<h3 id="wq1707"><a href="rbafzmst02.htm#ToC_1249">Authorization</a></h3>
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<p>The privileges held by the authorization ID of the statement must include
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at least one of the following: </p>
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<ul>
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<li>For each table or view identified in the statement:
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<ul>
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<li>Every privilege specified in the statement</li>
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<li>The system authority of *OBJMGT on the table or view</li>
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<li>The system authority *EXECUTE on the library containing the table or view</li></ul></li>
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<li>Administrative authority</li></ul>
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<a name="wq1708"></a>
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<h3 id="wq1708"><a href="rbafzmst02.htm#ToC_1250">Syntax</a></h3>
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<a href="rbafzmstrevoket.htm#synsrevoketbl"><img src="c.gif" alt="Click to skip syntax diagram" /></a>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn374.htm"
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border="0" /></span><a href="#skipsyn-373"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-PRIVILEGES-.
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>>-REVOKE--+-ALL--+------------+---------------------------+---->
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| .-,-----------------------------------------. |
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| V | |
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'---+-ALTER---------------------------------+-+-'
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+-DELETE--------------------------------+
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+-INDEX---------------------------------+
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+-INSERT--------------------------------+
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+-REFERENCES--+-----------------------+-+
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| | .-,-----------. | |
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| | V | | |
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| '-(----<span class="italic">column-name</span>-+--)-' |
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+-SELECT--------------------------------+
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'-UPDATE--+-----------------------+-----'
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| .-,-----------. |
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| V | |
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'-(----<span class="italic">column-name</span>-+--)-'
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.-,--------------.
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.-TABLE-. V |
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>--ON--+-------+----+-<span class="italic">table-name</span>-+-+--FROM---------------------->
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'-<span class="italic">view-name</span>--'
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.-,----------------------.
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V |
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>----+-<span class="italic">authorization-name</span>-+-+----------------------------------><
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'-PUBLIC-------------'
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</pre>
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<a name="skipsyn-373" id="skipsyn-373"></a>
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<a name="synsrevoketbl"></a>
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<h3 id="synsrevoketbl"><a href="rbafzmst02.htm#ToC_1251">Description</a></h3>
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<dl class="parml">
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<dt class="bold">ALL <span class="base">or</span> ALL PRIVILEGES </dt><a id="idx3070" name="idx3070"></a><a id="idx3071" name="idx3071"></a>
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<dd>Revokes one or more privileges from each <span class="italic">authorization-name</span>. The privileges revoked are those privileges on the identified tables
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and views that were granted to the <span class="italic">authorization-names</span>. Note that revoking ALL PRIVILEGES on a table or view is not the same
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as revoking the system authority of *ALL.
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<p>If you do not use ALL, you must
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use one or more of the keywords listed below. Each keyword revokes the privilege
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described, but only as it applies to the tables and views named in the ON
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clause.</p>
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</dd>
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<dt class="bold">ALTER </dt><a id="idx3072" name="idx3072"></a>
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<dd>Revokes the privilege to use the ALTER TABLE statement on tables. Revokes
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the privilege to use the COMMENT and LABEL statements on tables and views.
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</dd>
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<dt class="bold">DELETE </dt><a id="idx3073" name="idx3073"></a>
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<dd>Revokes the privilege to use the DELETE statement.
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</dd>
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<dt class="bold">INDEX </dt><a id="idx3074" name="idx3074"></a>
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<dd>Revokes the privilege to use the CREATE INDEX statement.
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</dd>
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<dt class="bold">INSERT </dt><a id="idx3075" name="idx3075"></a>
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<dd>Revokes the privilege to use the INSERT statement.
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</dd>
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<dt class="bold">REFERENCES </dt><a id="idx3076" name="idx3076"></a>
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<dd>Revokes the privilege to add a referential constraint in which the table
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is a parent.
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</dd>
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<dt class="bold">REFERENCES (<var class="pv">column-name</var>,...) </dt><a id="idx3077" name="idx3077"></a>
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<dd>Revokes the privilege to add a referential constraint using the specified
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column(s) in the parent key. Each column name must be an unqualified name
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that identifies a column in each table identified in the ON clause.
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</dd>
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<dt class="bold">SELECT </dt><a id="idx3078" name="idx3078"></a>
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<dd>Revokes the privilege to use the SELECT or CREATE VIEW statement.
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</dd>
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<dt class="bold">UPDATE </dt><a id="idx3079" name="idx3079"></a>
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<dd>Revokes the privilege to use the UPDATE statement.
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</dd>
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<dt class="bold">UPDATE (<var class="pv">column-name</var>,...) </dt><a id="idx3080" name="idx3080"></a>
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<dd>Revokes the privilege to update the specified columns. Each column
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name must be an unqualified name that identifies a column in each table identified
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in the ON clause.
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</dd>
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<dt class="bold">ON <var class="pv">table-name</var><span class="base"> or </span> <var class="pv">view-name, ...</var> </dt><a id="idx3081" name="idx3081"></a><a id="idx3082" name="idx3082"></a><a id="idx3083" name="idx3083"></a>
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<dd>Identifies the table or view on which you are revoking the privileges.
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The <span class="italic">table-name</span> or <span class="italic">view-name</span> must
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identify a table or view that exists at the current server, but must not identify
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a global temporary table.
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</dd>
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<dt class="bold">FROM </dt><a id="idx3084" name="idx3084"></a>
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<dd>Identifies from whom the privileges are revoked.
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<dl class="parml">
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<dt class="bold"><var class="pv">authorization-name,...</var> </dt><a id="idx3085" name="idx3085"></a>
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<dd>Lists one or more authorization IDs. Do not specify the same <var class="pv">authorization-name</var> more than once.
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</dd>
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<dt class="bold">PUBLIC </dt><a id="idx3086" name="idx3086"></a>
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<dd>Revokes the specified privileges from PUBLIC.
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</dd>
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</dl>
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</dd>
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</dl>
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<a name="wq1709"></a>
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<h3 id="wq1709"><a href="rbafzmst02.htm#ToC_1252">Notes</a></h3>
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<p><span class="bold">Multiple grants:</span> If the same privilege is granted
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to the same user more than once, revoking that privilege from that user nullifies
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all those grants.</p>
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<p>If you revoke a privilege, it nullifies any grant of that privilege, regardless
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of who granted it.</p>
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<p><span class="bold">Revoking WITH GRANT OPTION:</span> The only way to revoke
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the WITH GRANT OPTION is to revoke ALL.</p>
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<p><span class="bold">Privilege warning:</span> Revoking a specific privilege
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from a user does not necessarily prevent that user from performing an action
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that requires that privilege. For example, the user may still have the privilege
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through PUBLIC or administrative privileges.</p>
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<p>If more than one system authority will be revoked with an SQL privilege,
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and any one of the authorities cannot be revoked, then a warning occurs and
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no authorities will be revoked for that privilege.</p>
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<p><span class="bold">Corresponding system authorities:</span> When a table privilege
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is revoked, the corresponding system authorities are revoked, except: </p>
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<ul>
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<li>When revoking authorities to a table or view, *OBJOPR is revoked only
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when *ADD, *DLT, *READ, and *UPD have all been revoked.</li>
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<li>When revoking authorities to a view, authorities will not be
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revoked from any tables or views referenced in the fullselect of the view
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definition.</li></ul><p class="indatacontent">For information on the system authorities that correspond to SQL privileges
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see <a href="rbafzmstgnt.htm#gnt">GRANT (Table or View Privileges)</a>.</p>
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<p>Revoking either the INDEX or ALTER privilege, revokes the system authority
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*OBJALTER.</p>
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<a name="wq1710"></a>
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<h3 id="wq1710"><a href="rbafzmst02.htm#ToC_1253">Examples</a></h3>
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<p><span class="italic">Example 1:</span> Revoke SELECT privileges on table EMPLOYEE
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from user ENGLES. </p>
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<a name="refrtb1"></a>
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<pre id="refrtb1" class="xmp"> <span class="bold">REVOKE SELECT</span>
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<span class="bold">ON TABLE</span> EMPLOYEE
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<span class="bold">FROM</span> ENGLES</pre>
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<p><span class="italic">Example 2:</span> Revoke update privileges on table EMPLOYEE
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previously granted to all users. Note that grants to specific users are not
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affected. </p>
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<a name="refrtb2"></a>
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<pre id="refrtb2" class="xmp"> <span class="bold">REVOKE UPDATE</span>
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<span class="bold">ON TABLE</span> EMPLOYEE
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<span class="bold">FROM PUBLIC</span></pre>
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<p><span class="italic">Example 3:</span> Revoke all privileges on table EMPLOYEE
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from users PELLOW and ANDERSON. </p>
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<a name="refrtb3"></a>
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<pre id="refrtb3" class="xmp"> <span class="bold">REVOKE ALL</span>
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<span class="bold">ON TABLE</span> EMPLOYEE
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<span class="bold">FROM</span> PELLOW, ANDERSON</pre>
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<p><span class="italic">Example 4:</span> Revoke the privilege to update column_1
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in VIEW1 from FRED. </p>
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<a name="refrtb4"></a>
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<pre id="refrtb4" class="xmp"> <span class="bold">REVOKE UPDATE(</span>column_1<span class="bold">)
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ON</span> VIEW1
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<span class="bold">FROM</span> FRED</pre>
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<hr /><br />
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