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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I need to be able to perform an ST_intersects with a geometry that could be a GeometryCollection.<o:p></o:p></p>
<p class="MsoNormal">I understand this is not supported from the PostGis documentation so I have written this query:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">select t.geometry<o:p></o:p></p>
<p class="MsoNormal">from schema.table t<o:p></o:p></p>
<p class="MsoNormal">where (st_intersects(t.geometry, st_collectionextract( st_geometryfromtext(@geometrycollection, 27700),1)) --points<o:p></o:p></p>
<p class="MsoNormal">or st_intersects(t.geometry, st_collectionextract( st_geometryfromtext(@geometrycollection, 27700),2)) --lines<o:p></o:p></p>
<p class="MsoNormal">or st_intersects(t.geometry, st_collectionextract( st_geometryfromtext(@geometrycollection, 27700),3)) --polygons<o:p></o:p></p>
<p class="MsoNormal">);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Where geometrycollection will be something like 'GEOMETRYCOLLECTION (POINT (290099.9 91499.9), LINESTRING (290099.9 91499.9, 291100.1 91499.9, 291100.1 92500.1, 290099.9 92500.1), POLYGON ((303000 88000, 307000 88000, 307000 84000, 303000
84000, 303000 88000)))'<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a couple of questions:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this the best way to do this? (other people must be doing it?)<o:p></o:p></p>
<p class="MsoNormal">Am I missing something as if this works why isn’t it a built in function in PostGis?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any feedback greatly appreciated,<o:p></o:p></p>
<p class="MsoNormal">Regards<o:p></o:p></p>
<p class="MsoNormal">Nick<o:p></o:p></p>
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