62 lines
3.5 KiB
HTML
62 lines
3.5 KiB
HTML
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<meta name="DC.Title" content="SQL4012 - Index created from index &1 for table &2" />
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<title>SQL4012 - Index created from index &1 for table &2</title>
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</head>
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<body id="sql4012"><a name="sql4012"><!-- --></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">SQL4012 - Index created from index &1 for table &2</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">SQL4012</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 ">Index created from index &1 for table &2</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 ">A temporary index was created using the specified index to access rows
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from the queried table for one of the following reasons: <ul><li>Perform specified ordering/grouping criteria.</li>
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<li>Perform specified join criteria.</li>
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</ul>
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The table number refers to the relative position of this table in the
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query.</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 ">Creating an index from an index is generally a good performing option.
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Consider creating a permanent index for frequently run queries. The query
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can be run in debug mode (<span class="cmdname">STRDBG</span>) to determine
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the key columns used when creating the index. NOTE: If a permanent index is
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created, it is possible the query optimizer may still choose to create a temporary
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index to access the rows from the table.</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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