IsEmpty
ISEMPTY(g Geometry)
Alias: ST_ISEMPTY
Returns 1 if g contains no points; returns 0 otherwise. Returns ‑1 if there is an error.
Result type: integer
Examples:
g is the intersection of two polygons that have no shared points:
SELECT ISEMPTY(INTERSECTION(POLYFROMTEXT('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))'), POLYFROMTEXT('POLYGON((8 8, 10 8, 10 10, 8 10, 8 8))')));
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col1
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1
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g is an empty geometry collection:
SELECT ISEMPTY(GEOMCOLLFROMTEXT('GEOMETRYCOLLECTION EMPTY'));
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col1
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1
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g is a linestring:
SELECT ISEMPTY(LINEFROMTEXT('LINESTRING(0 0, 10 10)'));
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col1
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0
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Last modified date: 08/28/2024