65 lines
3.8 KiB
HTML
65 lines
3.8 KiB
HTML
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="SQL4014 - &1 join column pair(s) are used for this join position" />
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<title>SQL4014 - &1 join column pair(s) are used for this join position</title>
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</head>
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<body id="sql4014"><a name="sql4014"><!-- --></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">SQL4014 - &1 join column pair(s) are used for this join position</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">SQL4014</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 ">&1 join column pair(s) are used for this join position</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 ">The query optimizer may choose to process join predicates as either
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join selection or row selection. The join predicates used in join selection
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are determined by the final join order and the index used. This message indicates
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how many join column pairs were processed as join selection at this join position.
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Message SQL4015 provides detail on which columns comprise the join column
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pairs. <p></p>
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If 0 join column pairs were specified then index
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scan-key row positioning with row selection was used instead of join selection.</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 ">If fewer join pairs are used at a join position than expected, it is
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possible no index exists which has keys matching the desired join columns.
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Try creating an index whose keys match the join predicates. <p></p>
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If
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0 join column pairs were specified then index scan-key row positioning was
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used. Index scan-key row positioning is normally a good performing option.
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Message SQL4011 provides more information about index scan-key row positioning.</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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