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<p class="MsoNormal"><span style="color:#1F497D">What does the template look like? --Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> mapserver-users-bounces@lists.osgeo.org [mailto:mapserver-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Bistrais, Bob<br>
<b>Sent:</b> Friday, April 19, 2013 3:29 PM<br>
<b>To:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-users] problem with processquerytemplate and large selection sets<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve run into a problem when running queries with a large number of results (in my test case, over 1000 records, point locations, shape file). After some testing, I found the problem wasn’t the query itself- I did a queryByAttributes and
it told me the records were selected within a couple seconds. On further investigation, the problem seems to be when calling the processquerytemplate method. The process takes a long time, often timing out beyond 30 seconds. I am also suspicious that the
result set is getting processed in such a way that we are reiterating over records.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Has anyone had a similar problem, and are there any suggestions ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is a code excerpt, I hope it’s enough to help…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">$layer->queryByAttributes($queryItem,$queryExp,MS_MULTIPLE);<o:p></o:p></p>
<p class="MsoNormal">$numResults = $layer->getNumResults();<o:p></o:p></p>
<p class="MsoNormal">$layer->open();<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">for($i=0;$i<$layer->getNumResults();$i++){<o:p></o:p></p>
<p class="MsoNormal"> $shape=$layer->getShape($layer->getResult($i));<o:p></o:p></p>
<p class="MsoNormal"> $foundShapes[] = $shape;<o:p></o:p></p>
<p class="MsoNormal"> $fields = array();<o:p></o:p></p>
<p class="MsoNormal"> array_push($fields, 'wkt_geometry text');<o:p></o:p></p>
<p class="MsoNormal"> foreach($attributes as $attribute) {<o:p></o:p></p>
<p class="MsoNormal"> array_push($fields, $attribute.' text');<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> array_push($results,$map->processquerytemplate(array(), false));<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">$layer->close();<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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