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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">MapServer FILTERs are now only written using MapServer expression syntax (e.g. (“[someitem]” != “someval”)). Drivers can support translation capabilities to
create native SQL under the hood. This was done to standardize the syntax across all drivers. Prior to 7.0 the syntax varied by driver. In addition, FILTER values are preserved when used with WFS or native MapServer attribute queries.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">With database backends there has been little reason to use FILTERs since you could often just extend the DATA statement.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Note that if need to you can still define a native SQL independently of the DATA statement using the processing tag “native_filter”, for example:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> PROCESSING “native_filter=native SQL string”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This is also preserved with WFS. Does this help?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<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>Steve.Toutant@inspq.qc.ca<br>
<b>Sent:</b> Thursday, March 26, 2015 8:20 AM<br>
<b>To:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-users] ms7 How to use FILTER<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I'm confused on how to use FILTER when datasource is postgis or Oracle Spatial (Native Connection)</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">In an old thread, I was told to not use FILTER, but use a WHERE clause in the Data statement.</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">In the ms7 Mapfile-Layer-Data doc, I see for Oracle</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">"</span><span style="font-family:"Arial","sans-serif";color:#4F4F4F">Note that there are important performance impacts when using spatial subqueries however. Try using MapServer’s </span><a href="http://mapserver.org/mapfile/layer.html#filter"><span style="font-family:"Arial","sans-serif";color:#1F0062">FILTER</span></a><span style="font-family:"Arial","sans-serif";color:#4F4F4F"> whenever
possible instead.</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">"</span>
<o:p></o:p></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I remember I had a bug with MS6 when using FILTER using WFS. A getfeature on the layer with a spatial or logical filter, the FILTEr in the mapfile was overwritten.</span>
<o:p></o:p></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Please, how should we define/use FILTER int a mapfile with postgis and also oracle (using native connection, not ogr)?</span>
<o:p></o:p></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">THANKS!</span>
<o:p></o:p></p>
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