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--></style></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>And spatial filtering is working, it was due to BBOX sorting that it was not being very efficient in the spatial filtering.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Is there a method to use SQLite dialect with MapServer queries with parquet and OGR? Wanted to use SAMPLE but this is only supported via SQLite dialect.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Mike<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><div><div><p class=MsoNormal>-- <o:p></o:p></p></div><div><p class=MsoNormal>Michael Smith<o:p></o:p></p><p class=MsoNormal>RSGIS Center – ERDC CRREL NH<o:p></o:p></p></div></div><p class=MsoNormal>US Army Corps<span style='font-family:"Calibri",sans-serif'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-family:"Calibri",sans-serif;color:black'>From: </span></b><span style='font-family:"Calibri",sans-serif;color:black'>Even Rouault <even.rouault@spatialys.com><br><b>Date: </b>Monday, July 21, 2025 at 10:05 AM<br><b>To: </b>Michael Smith <michael.smith.erdc@gmail.com>, MapServer-dev <mapserver-dev@lists.osgeo.org><br><b>Subject: </b>Re: [MapServer-dev] Using OGR geoparquet data in mapserver - no spatial filtering<o:p></o:p></span></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>Mike, <o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre><o:p> </o:p></pre><pre>Anyone know a current way to get mapserver to add spatial filtering on OGR geoparquet layers. Have been unable to get the actual sql query being used with CPL_DEBUG inside mapserver with CONFIG "CPL_DEBUG" "ON" but from the performance, it appears no spatial filtering is being done. I suspect code changes to mapogr would be needed to do this but wondering if anyone else has looked into this.<o:p></o:p></pre></blockquote><p class=MsoNormal>I haven't tried but I would assume this should work<br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>Also, I tried using ADBC connection to parquet, and while it worked (technically) it really used an excessive amount of CPU and memory over using the geoparquet driver. <o:p></o:p></pre></blockquote><p>Yes this is "expected". I noticed that the Arrow API of duckdb tends to ingest everything in memory before paging results.<o:p></o:p></p><p>Even<o:p></o:p></p><pre>-- <o:p></o:p></pre><pre><a href="http://www.spatialys.com">http://www.spatialys.com</a><o:p></o:p></pre><pre>My software is free, but my time generally not.<o:p></o:p></pre></div></body></html>