地理距离搜索MYSQL

Question

I'm doing a geo search with mysql using the spatial extension. FOr that i did a stored procedure (thats work really well when i tri on command line in mysql like that

mysql> CALL test2(GeomFromText('POINT(-0.93961472 43.52843475)'),0.6 );

DROP PROCEDURE `test2`//
CREATE DEFINER=`root`@`localhost` PROCEDURE `test2`(IN center2 point,IN dist int)
BEGIN
SET @center = center2;
SET @radius = dist;

SET @bbox = CONCAT('POLYGON((', 
 X(@center) - @radius, ' ', Y(@center) - @radius, ',', 
 X(@center) + @radius, ' ', Y(@center) - @radius, ',', 
 X(@center) + @radius, ' ', Y(@center) + @radius, ',', 
 X(@center) - @radius, ' ', Y(@center) + @radius, ',', 
 X(@center) - @radius, ' ', Y(@center) - @radius, '))' 
);

SELECT professionnels.*, AsText(coord) 
FROM professionnels 
WHERE Intersects( coord, GeomFromText(@bbox) ) 
AND SQRT(POW( ABS( X(coord) - X(@center)), 2) + POW( ABS(Y(coord) - Y(@center)), 2 )) < @radius limit 20;
end

But the problem is that i need to call that from php. and when i do it, an error is return said that

PROCEDURE test2 can't return a result set in the given context

So.. How can i use a turn around to return a set of data ?

Thanks

Answer 1

You can change the last part into

/*delete all rows from temp_table*/
DELETE FROM temp_table WHERE temp_table.somefield is not null;

INSERT INTO temp_table
  SELECT professionnels.*, AsText(coord) 
  FROM professionnels 
  WHERE Intersects( coord, GeomFromText(@bbox) ) 
  AND SQRT(POW( ABS( X(coord) - X(@center)), 2) 
      + POW( ABS(Y(coord) - Y(@center)), 2 )) < @radius limit 20;

Then you can select from the temp_table and find resultset there.