101 lines
5.8 KiB
HTML
101 lines
5.8 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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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="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="keywords" content="REFRESH TABLE statement, REFRESH TABLE,
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SQL statements, in REFRESH TABLE statement, table-name" />
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<title>REFRESH TABLE</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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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="hrefresh"></a>
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<h2 id="hrefresh"><a href="rbafzmst02.htm#ToC_1191">REFRESH TABLE</a></h2><a id="idx2974" name="idx2974"></a><a id="idx2975" name="idx2975"></a>
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<p>The REFRESH TABLE statement refreshes the data in a materialized query
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table. The statement deletes all rows in the materialized query table and
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then inserts the result rows from the <var class="pv">select-statement</var> specified
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in the definition of the materialized query table.</p>
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<a name="wq1662"></a>
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<h3 id="wq1662"><a href="rbafzmst02.htm#ToC_1192">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="wq1663"></a>
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<h3 id="wq1663"><a href="rbafzmst02.htm#ToC_1193">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 the table identified in the statement,
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<ul>
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<li>The system authority *OBJMGT on the table</li>
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<li>The DELETE privilege on the table</li>
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<li>The INSERT privilege on the table</li>
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<li>The system authority *EXECUTE on the library containing the table</li></ul></li>
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<li>Administrative authority</li></ul>
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<p>For information on the system authorities corresponding to SQL privileges,
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see <a href="rbafzmstgnt.htm#eqtablet">Corresponding System Authorities When Checking Privileges to a Table or View</a>.</p>
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<a name="wq1664"></a>
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<h3 id="wq1664"><a href="rbafzmst02.htm#ToC_1194">Syntax</a></h3>
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<a href="rbafzmsthrefresh.htm#synrefresh"><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="rbafzmstsyn363.htm"
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border="0" /></span><a href="#skipsyn-362"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-,--------------.
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V |
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>>-REFRESH TABLE------<span class="italic">table-name</span>---+---------------------------><
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</pre>
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<a name="skipsyn-362" id="skipsyn-362"></a>
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<a name="synrefresh"></a>
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<h3 id="synrefresh"><a href="rbafzmst02.htm#ToC_1195">Description</a></h3>
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<dl class="parml">
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<dt class="bold"><var class="pv">table-name</var> </dt><a id="idx2976" name="idx2976"></a>
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<dd>Identifies the materialized table to be refreshed. The table-name must
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identify a materialized query table that exists at the current server. REFRESH
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TABLE evaluates the <var class="pv">select-statement</var> in the definition of the materialized
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query table to refresh the table.
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</dd>
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</dl>
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<a name="wq1665"></a>
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<h3 id="wq1665"><a href="rbafzmst02.htm#ToC_1196">Notes</a></h3>
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<p><span class="bold">Refresh use of materialized query tables:</span> No
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materialized query tables are used to evaluate the <var class="pv">select-statement</var> during
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the processing of REFRESH TABLE statement.</p>
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<p><span class="bold">Refresh isolation level:</span> The isolation level used
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to evaluate the <var class="pv">select-statement</var> is either:</p>
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<ul>
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<li>the isolation level specified on the <var class="pv">isolation-level</var> clause of
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the <var class="pv">select-statement</var>, or</li>
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<li>if the <var class="pv">isolation-level</var> clause was not specified, the isolation
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level of the materialized query table recorded when CREATE TABLE or ALTER
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TABLE was issued.</li></ul>
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<p><span class="bold">Number of rows:</span> After successful execution of a REFRESH
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TABLE statement, the ROW_COUNT statement information item in the SQL Diagnostics
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Area (or SQLERRD(3) in the SQLCA) will contain the number of rows inserted
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into the materialized query table.</p>
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<a name="wq1666"></a>
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<h3 id="wq1666"><a href="rbafzmst02.htm#ToC_1197">Example</a></h3>
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<p>Refresh the data in the TRANSCOUNT materialized query table.</p>
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<pre class="xmp"> <span class="bold">REFRESH TABLE</span> TRANSCOUNT</pre><a id="idx2977" name="idx2977"></a><a id="idx2978" name="idx2978"></a>
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<hr /><br />
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