String fieldName = distanceRefLiteral.reference().info().ident().columnIdent().fqn();
FieldMapper mapper = getGeoPointFieldMapper(fieldName);
GeoPointFieldMapper geoMapper = ((GeoPointFieldMapper) mapper);
IndexGeoPointFieldData<?> fieldData = searchContext.fieldData().getForField(mapper);
Input geoPointInput = distanceRefLiteral.input();
Double[] pointValue = (Double[]) geoPointInput.value();
double lat = pointValue[1];
double lon = pointValue[0];
String parentName = functionLiteralPair.functionName();