EVOLUTION-MANAGER
Edit File: classOGRFeatureQuery.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.5"/> <title>OGR: OGRFeatureQuery Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">OGR </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.5 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li class="current"><a href="annotated.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="classOGRFeatureQuery-members.html">List of all members</a> </div> <div class="headertitle"> <div class="title">OGRFeatureQuery Class Reference</div> </div> </div><!--header--> <div class="contents"> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a8687495eac4e3f5e381b3dc79706d860"><td class="memItemLeft" align="right" valign="top">char ** </td><td class="memItemRight" valign="bottom"><a class="el" href="classOGRFeatureQuery.html#a8687495eac4e3f5e381b3dc79706d860">GetUsedFields</a> ()</td></tr> <tr class="separator:a8687495eac4e3f5e381b3dc79706d860"><td class="memSeparator" colspan="2"> </td></tr> </table> <h2 class="groupheader">Member Function Documentation</h2> <a class="anchor" id="a8687495eac4e3f5e381b3dc79706d860"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">char ** OGRFeatureQuery::GetUsedFields </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Returns lists of fields in expression.</p> <p>All attribute fields are used in the expression of this feature query are returned as a StringList of field names. This function would primarily be used within drivers to recognise special case conditions depending only on attribute fields that can be very efficiently fetched.</p> <p>NOTE: If any fields in the expression are from tables other than the primary table then NULL is returned indicating an error. In succesful use, no non-empty expression should return an empty list.</p> <dl class="section return"><dt>Returns</dt><dd>list of field names. Free list with <a class="el" href="cpl__string_8h.html#a5a39b9c5896a273cc6f06c1d5be93238">CSLDestroy()</a> when no longer required. </dd></dl> </div> </div> <hr/>The documentation for this class was generated from the following files:<ul> <li><a class="el" href="ogr__feature_8h_source.html">ogr_feature.h</a></li> <li>ogrfeaturequery.cpp</li> </ul> </div><!-- contents --> <hr> Generated for GDAL by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.8.5. </body> </html>