my tables are simple:
mysql> desc muralentry ;
+-----------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+------------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| user_src_id | int(11) | NO | MUL | NULL | |
| content | longtext | NO | | NULL | |
+-----------------+------------------+------+-----+---------+----------------+
mysql> desc muralentry_user ;
+-----------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+------------------+------+-----+---------+----------------+
| muralentry_id | int(11) | NO | PRI | NULL | auto_increment |
| userinfo_id | int(11) | NO | MUL | NULL | |
+-----------------+------------------+------+-----+---------+----------------+
Im doing the following query:
SELECT DISTINCT *
FROM muralentry
LEFT OUTER JOIN muralentry_user ON (muralentry.id = muralentry_user.muralentry_id)
WHERE user_src_id = 1
The explain:
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+------+-----------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+------+-----------------+
| 1 | SIMPLE | muralentry | ref | muralentry_99bd10ae | muralentry_99bd10ae | 4 | const | 686 | Using temporary |
| 1 | SIMPLE | muralentry_user | ref | muralentry_id,muralentry_user_bcd7114e | muralentry_user_bcd7114e | 4 | muralentry.id | 15 | |
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+------+-----------------+
Good result (for me :D) But, when i add another where clause:
SELECT DISTINCT *
FROM muralentry
LEFT OUTER JOIN muralentry_user ON (muralentry.id = muralentry_user.muralentry_id)
WHERE user_src_id = 1 OR userinfo_id = 1;
The explain:
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+---------+-----------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+---------+-----------------+
| 1 | SIMPLE | muralentry | ALL | muralentry_99bd10ae | NULL | NULL | NULL | 1140932 | Using temporary |
| 1 | SIMPLE | muralentry_user | ref | muralentry_id,muralentry_user_bcd7114e | muralentry_user_bcd7114e | 4 | muralentry.id | 15 | Using where |
+----+-------------+----------------------------+------+-------------------------------------------------------+-------------------------------------+---------+------------------------------------------+---------+-----------------+
Wow... the result if ALOT worst... How can i "fix" this? Should i create some index to do this job? Or recreate my query?
I'm expecting the following result: 'muralentry' rows where the user is 'user_src_id' AND the 'muralentry_user' rows where he is 'userinfo_id'.
-- edit --
I edited the question because when I wrote an AND actually wanted an OR... sorry for that!