Returns the lineal distance between two points located on a perfect sphere of radius = 6370986m. It is more quick than geo.distanceSpheroid but less accurate.

# 1 geo.distanceSphere

<geo.distanceSphere    ora_tol='ora_tol'    ora_unit='M|KM|CM|MM|MILE|NAUT_MILE|FOOT|INCH|SQ_KM...'>    <geom1> *        <geom1 /> *    </geom1>    <geom2> *        <geom1 /> *    </geom2></geo.distanceSphere>
Example
Copy
<select>
<columns>
<geo.distanceSphere ora_tol=''>
<geom1>a.the_geom</geom1>
<geom2>a.the_geom</geom2>
</geo.distanceSphere>
</columns>
<from table='points' alias='a' >
<join table='points' alias='b'>
</join>
</from>
<where>
a.name = 'Barcelona' AND b.name = 'London'
</where>
</select>