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Allow single-point polygons to be converted to circles

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This allows finding the center of a single-point polygon and converting
it to a point.

Per report from Josef Grahn
This commit is contained in:
Bruce Momjian 2014-02-24 12:24:00 -05:00
parent 8457d0beca
commit 423f69ab64
1 changed files with 1 additions and 6 deletions
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7
src/backend/utils/adt/geo_ops.c
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@ -5191,7 +5191,7 @@ poly_circle(PG_FUNCTION_ARGS)
CIRCLE *circle;
int i;
if (poly->npts < 2)
if (poly->npts < 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot convert empty polygon to circle")));
@ -5214,11 +5214,6 @@ poly_circle(PG_FUNCTION_ARGS)
circle->radius += point_dt(&poly->p[i], &circle->center);
circle->radius /= poly->npts;
if (FPzero(circle->radius))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot convert empty polygon to circle")));
PG_RETURN_CIRCLE_P(circle);
}