gistfile1.txt

SELECT 

planet_osm_point.name, 

ST_Distance(
    Geography(ST_Transform(planet_osm_point.way,4326)),
    Geography(ST_Transform(ST_Centroid(planet_osm_polygon.way),4326))
)

FROM 

planet_osm_polygon, planet_osm_point

WHERE 

ST_DWithin(
    Geography(ST_Transform(ST_Centroid(planet_osm_polygon.way),4326 )),
    Geography(ST_Transform( planet_osm_point.way,4326)), 
    2000.0)

AND planet_osm_polygon.name = 'Erika-Hess-Eisstadion'
AND planet_osm_point.amenity = 'restaurant';