Boundary
BOUNDARY(g Geometry)
Alias: ST_BOUNDARY
Returns the closure of the boundary of g.
Result type: geometry
Examples:
SELECT ASTEXT(BOUNDARY(LINEFROMTEXT('LINESTRING(0 0, 10 0, 10 10)')));
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col1
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MULTIPOINT (0 0, 10 10)
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SELECT ASTEXT(BOUNDARY(POLYFROMTEXT('POLYGON((0 0, 10 0, 10 10, 0 0))')));
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col1
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LINESTRING (0 0, 10 0, 10 10, 0 0)
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Last modified date: 11/09/2022