MYSQL - order by indexed column

Question

i have this table with 500,000 row

CREATE TABLE IF NOT EXISTS `listings` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `source_id` int(10) unsigned NOT NULL,
  `cat_id` mediumint(5) NOT NULL,
  `title` mediumtext NOT NULL,
  `views_point` int(10) unsigned NOT NULL DEFAULT '0',
  `publishedon_hourly` int(10) unsigned NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  KEY `views_point` (`views_point`),
  KEY `listings` (`publishedon_hourly`,`published`,`cat_id`,`source_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED AUTO_INCREMENT=365513 ;

i want to make a query like this

SELECT *
FROM listings
WHERE (
`publishedon_hourly`
BETWEEN UNIX_TIMESTAMP( '2015-09-5 12:00:00' )AND UNIX_TIMESTAMP( '2015-10-5 12:00:00' ) ) AND ( published =1 ) AND cat_id
IN ( 1, 2, 3, 4, 5 )
ORDER BY views_point DESC
LIMIT 10 

this query some time work as i want exactly ( see this ) , but after some opinions, this is incorrect, i searched on the web for solution, i found

this : http://venublog.com/2007/11/29/mysql-how-to-avoid-filesort/ and this: http://www.getsymphony.com/discuss/issues/view/657/ and i add index on views_point then tried this query

select t1.* 
from  listings t1 
left outer join  listings t2 on (t1.views_point=t2.views_point) 
order by t1.views_point 
limit 10

and this the explain

but i can not add this condition

`publishedon_hourly` BETWEEN UNIX_TIMESTAMP( '2015-09-5 12:00:00' ) AND UNIX_TIMESTAMP( '2015-09-5 12:00:00' ) ) AND ( published =1 ) AND cat_id = 5

i don't know, which one should i assign to (t1 or t2) ?

in the other hand what about this way

SELECT *
FROM listings
WHERE (
`publishedon_hourly` BETWEEN UNIX_TIMESTAMP( '2015-09-5 00:00:00' ) AND UNIX_TIMESTAMP( '2015-09-5 23:00:00' ))
AND (published =1)
and views_point is not null
ORDER BY views_point DESC limit 20

if any one will not be good,can any one tell me please how the big blogs get the posts by hits?

Answer 1

You should split your listings index to separate indices.

Apart from this, given that you sort by t1 , it is almost certain that you should specify t1 for all conditions.

EDIT: Use condition as

`t1`.`publishedon_hourly` BETWEEN UNIX_TIMESTAMP( '2015-09-5 12:00:00' ) AND UNIX_TIMESTAMP( '2015-09-5 12:00:00' ) ) AND ( `t1`.`published` = 1 ) AND `t1`.`cat_id` = 5