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GEOS_Error - invalid Polygon (collapsed to a line)
:memory: #use in-memory database
SELECT ST_IsValid(ST_GeomFromText('POLYGON((0 0, 0 0, 1 1, 0 0))')), GEOS_GetLastWarningMsg(), GEOS_GetLastErrorMsg(), GEOS_GetLastAuxErrorMsg(), ST_AsText(GEOS_GetCriticalPointFromMsg());
1 # rows (not including the header row)
5 # columns
ST_IsValid(ST_GeomFromText('POLYGON((0 0, 0 0, 1 1, 0 0))'))
GEOS_GetLastWarningMsg()
GEOS_GetLastErrorMsg()
GEOS_GetLastAuxErrorMsg()
ST_AsText(GEOS_GetCriticalPointFromMsg())
0
Too few points in geometry component at or near point 0 0
(NULL)
(NULL)
POINT(0 0)
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