63 lines
3.5 KiB
HTML
63 lines
3.5 KiB
HTML
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<meta name="DC.Title" content="SQL4034 - Multiple join classes used to process join" />
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<title>SQL4034 - Multiple join classes used to process join</title>
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</head>
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<body id="sql4034"><a name="sql4034"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">SQL4034 - Multiple join classes used to process join</h1>
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<div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th colspan="2" align="center" valign="middle" id="d0e16">SQL4034</th>
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</tr>
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</thead>
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<tbody><tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e16 ">Message Text:</td>
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<td valign="middle" width="73.9795918367347%" headers="d0e16 ">Multiple join classes used to process join</td>
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</tr>
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<tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e16 ">Cause Text:</td>
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<td valign="middle" width="73.9795918367347%" headers="d0e16 ">Multiple join classes are used when join queries are written that have
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conflicting operations or cannot be implemented as a single query.
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<p></p>
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Each join class will be optimized and processed as a separate step
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of the query with the results written out to a temporary table. <p></p>
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Access
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plan implementation information for each of the join classes is not available
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because access plans are not saved for the individual join class dials. Debug
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messages detailing the implementation of each join dial can be found in the
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joblog if the query is run in debug mode using the <span class="cmdname">STRDBG</span> CL
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command.</td>
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</tr>
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<tr valign="middle"><td valign="middle" width="26.02040816326531%" headers="d0e16 ">Recovery Text:</td>
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<td valign="middle" width="73.9795918367347%" headers="d0e16 ">Refer to <a href="perf24.htm#perf24">Join optimization</a> for more information
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about join classes.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="prtsqlinfmsg.htm" title="The following are the messages returned from PRTSQLINF.">PRTSQLINF message reference</a></div>
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</div>
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</div>
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</body>
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</html>
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