Using UNION to concatenate query results - mysql

Question

I'm trying to execute queries and append the results into another query result, to maintain order. So I calculating the distance and at the end ordering by a "fake var" and then by distance.
Here's the query:
-- --------------------------------------------------------------------------------
-- Routine DDL
-- Note: comments before and after the routine body will not be stored by the server
-- --------------------------------------------------------------------------------
DELIMITER $$
CREATE DEFINER=`root`#`localhost` PROCEDURE `Test`(IN basic_user_id INT, IN max_dist INT, IN q VARCHAR(255), IN index_start INT, IN index_end INT)
BEGIN
DECLARE mylon DOUBLE;
DECLARE mylat DOUBLE;
DECLARE lon1 FLOAT;
DECLARE lon2 FLOAT;
DECLARE lat1 FLOAT;
DECLARE lat2 FLOAT;
SET #location_id = (SELECT location_id from basicuser where id = basic_user_id);
SET #group_id = (SELECT group_id from basicuser where id = basic_user_id);
SET #subgroup_id = (SELECT subgroup_id from basicuser where id = basic_user_id);
SET #tertiarygroup_id = (SELECT tertiarygroup_id from basicuser where id = basic_user_id);
-- get the original lon and lat for the userid
SELECT longitude, latitude into mylon, mylat from location where id = #location_id;
set lon1 = mylon - max_dist / abs(cos(radians(mylat)) * 69);
set lon2 = mylon + max_dist / abs(cos(radians(mylat)) * 69);
set lat1 = mylat - (max_dist / 69);
set lat2 = mylat + (max_dist / 69);
select #group_id, #subgroup_id, #tertiarygroup_id;
(
SELECT 1 as `temp`, `inradar_ad`.*, 3956 * 2 * ASIN(SQRT(POWER(SIN((orig.latitude - dest.latitude) * pi()/180 / 2), 2) + COS(orig.latitude * pi()/180) * COS(dest.latitude * pi()/180) * POWER(SIN((orig.longitude - dest.longitude) * pi()/180 / 2), 2))) as distance
FROM
location AS dest
LEFT OUTER JOIN `inradar_ad` ON (`inradar_ad`.location_id = dest.id)
LEFT OUTER JOIN `inradar_ad_company` ON (`inradar_ad`.`id` = `inradar_ad_company`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_ad_person` ON (`inradar_ad`.`id` = `inradar_ad_person`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_category` ON (`inradar_ad`.`category_id` = `inradar_category`.`id`)
LEFT OUTER JOIN `inradar_subcategory` ON (`inradar_ad`.`subcategory_id` = `inradar_subcategory`.`id`)
LEFT OUTER JOIN `basicuser` ON (`inradar_ad`.`owner_id` = `basicuser`.`id`)
LEFT OUTER JOIN `auth_user` ON (`basicuser`.`user_id` = `auth_user`.`id`)
LEFT OUTER JOIN `inradar_ad_multiple` ON (`inradar_ad`.`multiple_advertiser_id` = `inradar_ad_multiple`.`id`),
location AS orig
WHERE orig.id = #location_id AND
(
(
`inradar_ad_multiple`.`id` IS NULL AND
(
`inradar_ad_company`.`corporate_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad_person`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_category`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_subcategory`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad`.`description` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`first_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`last_name` LIKE REPLACE('%$$**$$%', '$$**$$', q)
)
)
) AND
`basicuser`.`tertiarygroup_id` = #tertiarygroup_id AND
dest.longitude BETWEEN lon1 AND lon2 AND dest.latitude BETWEEN lat1 AND lat2
HAVING distance < max_dist
) UNION (
SELECT 2 as `temp`, `inradar_ad`.*, 3956 * 2 * ASIN(SQRT(POWER(SIN((orig.latitude - dest.latitude) * pi()/180 / 2), 2) + COS(orig.latitude * pi()/180) * COS(dest.latitude * pi()/180) * POWER(SIN((orig.longitude - dest.longitude) * pi()/180 / 2), 2))) as distance
FROM
location AS dest
LEFT OUTER JOIN `inradar_ad` ON (`inradar_ad`.location_id = dest.id)
LEFT OUTER JOIN `inradar_ad_company` ON (`inradar_ad`.`id` = `inradar_ad_company`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_ad_person` ON (`inradar_ad`.`id` = `inradar_ad_person`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_category` ON (`inradar_ad`.`category_id` = `inradar_category`.`id`)
LEFT OUTER JOIN `inradar_subcategory` ON (`inradar_ad`.`subcategory_id` = `inradar_subcategory`.`id`)
LEFT OUTER JOIN `basicuser` ON (`inradar_ad`.`owner_id` = `basicuser`.`id`)
LEFT OUTER JOIN `auth_user` ON (`basicuser`.`user_id` = `auth_user`.`id`)
LEFT OUTER JOIN `inradar_ad_multiple` ON (`inradar_ad`.`multiple_advertiser_id` = `inradar_ad_multiple`.`id`),
location AS orig
WHERE orig.id = #location_id AND
(
(
`inradar_ad_multiple`.`id` IS NULL AND
(
`inradar_ad_company`.`corporate_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad_person`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_category`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_subcategory`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad`.`description` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`first_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`last_name` LIKE REPLACE('%$$**$$%', '$$**$$', q)
)
)
) AND
`basicuser`.`subgroup_id` = #subgroup_id AND
dest.longitude BETWEEN lon1 AND lon2 AND dest.latitude BETWEEN lat1 AND lat2
HAVING distance < max_dist
) UNION (
SELECT 3 as `temp`, `inradar_ad`.*, 3956 * 2 * ASIN(SQRT(POWER(SIN((orig.latitude - dest.latitude) * pi()/180 / 2), 2) + COS(orig.latitude * pi()/180) * COS(dest.latitude * pi()/180) * POWER(SIN((orig.longitude - dest.longitude) * pi()/180 / 2), 2))) as distance
FROM
location AS dest
LEFT OUTER JOIN `inradar_ad` ON (`inradar_ad`.location_id = dest.id)
LEFT OUTER JOIN `inradar_ad_company` ON (`inradar_ad`.`id` = `inradar_ad_company`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_ad_person` ON (`inradar_ad`.`id` = `inradar_ad_person`.`inradarad_ptr_id`)
LEFT OUTER JOIN `inradar_category` ON (`inradar_ad`.`category_id` = `inradar_category`.`id`)
LEFT OUTER JOIN `inradar_subcategory` ON (`inradar_ad`.`subcategory_id` = `inradar_subcategory`.`id`)
LEFT OUTER JOIN `basicuser` ON (`inradar_ad`.`owner_id` = `basicuser`.`id`)
LEFT OUTER JOIN `auth_user` ON (`basicuser`.`user_id` = `auth_user`.`id`)
LEFT OUTER JOIN `inradar_ad_multiple` ON (`inradar_ad`.`multiple_advertiser_id` = `inradar_ad_multiple`.`id`),
location AS orig
WHERE orig.id = #location_id AND
(
(
`inradar_ad_multiple`.`id` IS NULL AND
(
`inradar_ad_company`.`corporate_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad_person`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_category`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_subcategory`.`name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`inradar_ad`.`description` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`first_name` LIKE REPLACE('%$$**$$%', '$$**$$', q) OR
`auth_user`.`last_name` LIKE REPLACE('%$$**$$%', '$$**$$', q)
)
)
) AND
`basicuser`.`group_id` = #group_id AND
dest.longitude BETWEEN lon1 AND lon2 AND dest.latitude BETWEEN lat1 AND lat2
HAVING distance < max_dist
)
ORDER by `temp` ASC, distance ASC;
END
But that returns duplicated entries, like this:
# temp, id, seller_id, owner_id, description, category_id, subcategory_id, video_url, logo, location_id, business_hours, subscription_plan_id, tags, advertiser_occupation, advertiser_group_message, email, email_contact_form, website, e_commerce, phone, phone2, blap_phone, delivery, comment_votes, comment_quantity, multiple_advertiser_id, user_type, additional_info, advertiser_available, used_free_coupom, distance
1 37294 40 35 2 37667 (62) 3523-9609 0 0 company 0 0 105.60177674937776
1 37256 36 35 1 37557 (19)4141-5857 0 0 0 company 0 0 233.5020148948106
1 37254 40 35 1 37555 (16) 3624-8409 0 0 company 0 0 297.9775326093067
1 37264 40 35 1 37579 (67) 3251-1186 0 0 company 0 0 829.305941965672
2 37294 40 35 2 37667 (62) 3523-9609 0 0 company 0 0 105.60177674937776
2 37255 52 35 1 37556 (11) 5669-0169 0 0 company 0 0 218.0241298958371
2 37256 36 35 1 37557 (19)4141-5857 0 0 0 company 0 0 233.5020148948106
2 37254 40 35 1 37555 (16) 3624-8409 0 0 company 0 0 297.9775326093067
2 37264 40 35 1 37579 (67) 3251-1186 0 0 company 0 0 829.305941965672
3 37294 40 35 2 37667 (62) 3523-9609 0 0 company 0 0 105.60177674937776
3 37255 52 35 1 37556 (11) 5669-0169 0 0 company 0 0 218.0241298958371
3 37256 36 35 1 37557 (19)4141-5857 0 0 0 company 0 0 233.5020148948106
3 37254 40 35 1 37555 (16) 3624-8409 0 0 company 0 0 297.9775326093067
3 37264 40 35 1 37579 (67) 3251-1186
0 0 company 0 0 829.305941965672
What am I doing wrong, there?
Thanks very much in advance.

Answer 1

You can get rid of the UNION and do the whole thing in one SELECT.
CASE statement
Select everything you want and set your fake var within the SELECT clause.
SELECT CASE
WHEN `basicuser`.`tertiarygroup_id` = #tertiarygroup_id THEN 1
WHEN `basicuser`.`subgroup_id` = #subgroup_id THEN 2
WHEN `basicuser`.`group_id` = #group_id THEN 3
END as temp, ...
...
WHERE (
`basicuser`.`tertiarygroup_id` = #tertiarygroup_id OR
`basicuser`.`subgroup_id` = #subgroup_id OR
`basicuser`.`group_id` = #group_id
) AND ...
ORDER BY booleans
If you have a tree-like structure for your tertiary/secondary/groups, you can leverage the boolean order in the ORDER BY clause
ORDER BY cond1 DESC, cond2 DESC, cond3 DESC, distance ASC