join-vs-exists.sql

-- BEST
-- "HashAggregate  (cost=478.98..478.99 rows=1 width=67) (actual time=0.159..0.159 rows=1 loops=1)"

 SELECT DISTINCT media_entries.*
 FROM media_entries
 INNER JOIN meta_data md1 ON (md1.media_entry_id = media_entries.id AND md1.string ILIKE '%Tigernase%')
 INNER JOIN meta_data md2 ON md2.media_entry_id = media_entries.id
 INNER JOIN meta_data_keywords ON meta_data_keywords.meta_datum_id = md2.id
 INNER JOIN keywords ON meta_data_keywords.keyword_id = keywords.id AND keywords.term ILIKE '%greis%'
 WHERE (media_entries.get_metadata_and_previews = TRUE
    OR media_entries.responsible_user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'
    OR EXISTS
      (SELECT 1
       FROM media_entry_user_permissions meup
       WHERE ((meup.media_entry_id = media_entries.id
         AND meup.get_metadata_and_previews = TRUE)
         AND meup.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'))
    OR EXISTS
      (SELECT 1
       FROM media_entry_group_permissions megp
       INNER JOIN groups ON groups.id = megp.group_id
       INNER JOIN groups_users gu ON gu.group_id = groups.id
       WHERE ((megp.media_entry_id = media_entries.id
         AND megp.get_metadata_and_previews = TRUE)
         AND gu.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e')));

-- Limit  (cost=450.65..450.65 rows=1 width=67) (actual time=0.231..0.232 rows=1 loops=1)

SELECT media_entries.*
FROM (
	SELECT media_entries.*
	FROM media_entries
	INNER JOIN meta_data ON meta_data.media_entry_id = media_entries.id
	WHERE meta_data.meta_key_id = 'madek_core:title' 
		AND meta_data.string ILIKE '%Tigernase%' ) AS media_entries
INNER JOIN meta_data ON meta_data.media_entry_id = media_entries.id
INNER JOIN meta_data_keywords ON meta_data_keywords.meta_datum_id = meta_data.id
INNER JOIN keywords ON meta_data_keywords.keyword_id = keywords.id
       AND keywords.term ILIKE '%greis%'
       AND (media_entries.get_metadata_and_previews = TRUE
            OR media_entries.responsible_user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'
            OR EXISTS
              (SELECT 1
               FROM media_entry_user_permissions meup
               WHERE ((meup.media_entry_id = media_entries.id
                       AND meup.get_metadata_and_previews = TRUE)
                      AND meup.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'))
            OR EXISTS
              (SELECT 1
               FROM media_entry_group_permissions megp
               INNER JOIN groups ON groups.id = megp.group_id
               INNER JOIN groups_users gu ON gu.group_id = groups.id
               WHERE ((megp.media_entry_id = media_entries.id
                       AND megp.get_metadata_and_previews = TRUE)
                      AND gu.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'
                      )))
ORDER BY media_entries.created_at ASC LIMIT 10
OFFSET 0;

-- Nested Loop  (cost=1615.32..27255.55 rows=1 width=67) (actual time=9.251..61.326 rows=1 loops=1)

SELECT media_entries.*
FROM media_entries
WHERE
	EXISTS
		(SELECT 1
		FROM meta_data
		WHERE meta_data.meta_key_id = 'madek_core:title' 
		  AND meta_data.string ILIKE '%Tigernase%'
		  AND meta_data.media_entry_id = media_entries.id )
	AND EXISTS
		(SELECT 1
		FROM meta_data
		INNER JOIN meta_data_keywords ON meta_data_keywords.meta_datum_id = meta_data.id
		INNER JOIN keywords ON meta_data_keywords.keyword_id = keywords.id
		       AND keywords.term ILIKE '%greis%'
                       and meta_data.media_entry_id = media_entries.id )
		
	AND (media_entries.get_metadata_and_previews = TRUE
            OR media_entries.responsible_user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'
            OR EXISTS
              (SELECT 1
               FROM media_entry_user_permissions meup
               WHERE ((meup.media_entry_id = media_entries.id
                       AND meup.get_metadata_and_previews = TRUE)
                      AND meup.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e'))
            OR EXISTS
              (SELECT 1
               FROM media_entry_group_permissions megp
               INNER JOIN groups ON groups.id = megp.group_id
               INNER JOIN groups_users gu ON gu.group_id = groups.id
               WHERE ((megp.media_entry_id = media_entries.id
                       AND megp.get_metadata_and_previews = TRUE)
                      AND gu.user_id = '16ae30bc-8f4a-4aef-aafe-918ec1c8b03e')));