How to use SphinxSE table + sort by "weight desc" when there are other joins in query? - join

Question

By default, when you perform query to sphinx table, Sphinx engine returns rows which are already sorted by query weight and does it really fast.
So, when I do this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
where article_ft.query='some text;mode=any;';
Where:
article is InnoDB like table.
article_ft is Sphinx table.
Both of them (article.name and article_ft) contain these data (1 line = 1 row):
This is text.
This is also some text.
This is another text.
Sphinx engine will return rows like:
This is also some text.
This is text.
This is another text.
But, If I do something like this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
left join article_category on article.category=article_category._id
where article_ft.query='some text;mode=any;';
It seems, MariaDB sorts it by its own way here.
Even If I provide Sphinx's 'sort' option like this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
left join article_category on article.category=article_category._id
where article_ft.query='some text;mode=any;sort=extended:#weight desc;';
Still it doesn't work.
Changing order of joins doesn't work as well.
If I use order by article_ft.weight DESC MariaDB returns error message like:
Error: ER_ILLEGAL_HA: Storage engine SPHINX of the table `article_ft` doesn't have this option
in case if article has no rows that could match condition like article.category=50.
article_ft was created using this:
CREATE TABLE article_ft
(
id BIGINT NOT NULL,
weight INTEGER NOT NULL,
query VARCHAR(3072) NOT NULL,
INDEX(query)
) ENGINE=SPHINX CONNECTION="sphinx://192.168.1.98:9402/article_ft";
How to use this "magical" sort by weight feature if query contains more joins with no errors in return?
Thanks forward, for any reply!
P.S. Can't provide you a fiddle for this because I do not know any SQL fiddle online service which supports Sphinx Tables. Also if you found more relevant topic question I'll appreciate that.

Answer 1

Put the article_ft table first in the query. ie ... article_ft inner join article ...
Or maybe use FORCE INDEX, to force the use of the query index. Then it might honour the sort order.
Failing that use a subquery?
(select name,weight from article_ft ... ) order by weight desc;