ST_PointInsideCircle — Tests if a point geometry is inside a circle defined by a center and radius
boolean ST_PointInsideCircle(geometry  a_point, float  center_x, float  center_y, float  radius);
Returns true if the geometry is a point and is inside the circle with center center_x,center_y and radius radius. 
                 
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                 Does not use spatial indexes. Use ST_DWithin instead.  | 
            
Availability: 1.2
Changed: 2.2.0 In prior versions this was called ST_Point_Inside_Circle
SELECT ST_PointInsideCircle(ST_Point(1,2), 0.5, 2, 3); st_pointinsidecircle ------------------------ t