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collect - PolygonM, PolygonZ
:memory: #use in-memory database
SELECT AsText(COLLECT(GeomFromText('POLYGONM((1 2 4, 3 4 2, 3 2 3, 1 2 4),(1.5 2.5 4, 2.5 3.5 3, 2.5 2.3 3, 1.5 2.5 4))'), GeomFromText('POLYGONZ((4 5 3.2, 1 2 4.6, 4 2 3.1, 4 5 3.2),(2 3 4, 3 4 1, 3 3 1, 2 3 4))')));
1 # rows (not including the header row)
1 # columns
AsText(COLLECT(GeomFromText('POLYGONM((1 2 4, 3 4 2, 3 2 3, 1 2 4),(1.5 2.5 4, 2.5 3.5 3, 2.5 2.3 3, 1.5 2.5 4))'), GeomFromText('POLYGONZ((4 5 3.2, 1 2 4.6, 4 2 3.1, 4 5 3.2),(2 3 4, 3 4 1, 3 3 1, 2 3 4))')))
MULTIPOLYGON M(((1 2 4, 3 4 2, 3 2 3, 1 2 4), (1.5 2.5 4, 2.5 3.5 3, 2.5 2.3 3, 1.5 2.5 4)), ((4 5 0, 1 2 0, 4 2 0, 4 5 0), (2 3 0, 3 4 0, 3 3 0, 2 3 0)))
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