问合并来自MySQL存储过程的结果

EN

DELIMITER $$

    DROP PROCEDURE IF EXISTS `geodist` $$
    CREATE PROCEDURE geodist (IN userid INT) BEGIN
    DECLARE mylon DOUBLE;  DECLARE mylat DOUBLE;
    DECLARE lon1 FLOAT;  DECLARE lon2 FLOAT;
    DECLARE lat1 FLOAT; DECLARE lat2 FLOAT;
    DECLARE dist INT;
    DECLARE no_more_locations INT; DECLARE l_location_count INT;

    -- get the original lon and lat for the userid
    DECLARE location_cursor CURSOR FOR
        SELECT geo_lat, geo_long, distance
        FROM activity_location_preferences
        INNER JOIN activity_preferences ON activity_location_preferences.preference_id = activity_preferences.id
        WHERE activity_preferences.user_id = userid
        ORDER BY activity_preferences.id ASC
        LIMIT 3;

    DECLARE CONTINUE HANDLER FOR NOT FOUND SET no_more_locations = 1;

    SET no_more_locations = 0;
    OPEN location_cursor;
    location_loop:WHILE(no_more_locations = 0) DO
        FETCH location_cursor INTO mylat, mylon, dist;
        IF no_more_locations = 1 THEN
            LEAVE location_loop;
        END IF;
        SET l_location_count = l_location_count+1;

        -- calculate lon and lat for the rectangle:
        SET lon1 = mylon - dist / abs(cos(radians(mylat)) * 69);
        SET lon2 = mylon + dist / abs(cos(radians(mylat)) * 69);
        SET lat1 = mylat - (dist / 69);
        SET lat2 = mylat + (dist / 69);

        -- run the query:
        SELECT `id`, `user_id`, `activity`, `geo_lat`, `geo_long`, `data`, `date_created`,  
        7912 * ASIN(SQRT(POWER(SIN((mylat - activity_logs.geo_lat) * pi()/180 / 2), 2) +  
        COS(mylat * pi()/180) *  COS(activity_logs.geo_lat * pi()/180) *  POWER(SIN((mylon - activity_logs.geo_long) * pi()/180 / 2), 2)  )) as distance
        FROM activity_logs
        WHERE 1
        AND activity_logs.geo_long BETWEEN lon1 AND lon2 
        AND activity_logs.geo_lat BETWEEN lat1 AND lat2
        HAVING distance < dist ORDER BY date_created DESC LIMIT 100;

    END WHILE location_loop;
    CLOSE location_cursor;
    SET no_more_locations = 0;

END $$

DELIMITER ;