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A filter is basically a where statement so I think it should be considered...
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> mapserver-dev <mapserver-dev-bounces@lists.osgeo.org> on behalf of Tamas Szekeres <szekerest@gmail.com><br>
<b>Sent:</b> Sunday, April 22, 2018 2:36:44 PM<br>
<b>To:</b> mapserver-dev@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-dev] Implement getNumFeatures for some drivers</font>
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<div dir="ltr">Hi Devs,
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<div>Currently getNumFeatures is supported by the inline layers only. Would that be sufficient to implement this for some other drivers, like MSSQL, PostGIS and OGR? </div>
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<div>The database drivers would probably rely on the count() aggegate in the SQL query, while we could use OGR_L_GetFeatureCount for the OGR layers.</div>
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<div>I could also imagine a default implementation if we use whichShapes on the layer extent and iterate the shapes to calculate the count.</div>
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<div>It is also a question whether getNumFeatures should consider the layer filter or not.</div>
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<div>Best regards,</div>
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<div>Tamas</div>
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