Question

Does anyone know why the published index is being ignored in this query?

SELECT news.id, news.slug, news.title, news.created_on FROM (news) 
WHERE `published` = '1' 
AND news.title LIKE '%running%' 
OR news.body LIKE '%running%' 
OR news.intro LIKE '%running%' 
ORDER BY created_on desc

Answer 1

I would assume that the ORs are causing it.
Try parenthesis around the three statements that are OR connected.

Like this:

SELECT news.id, news.slug, news.title, news.created_on FROM (news) 
WHERE `published` = '1' 
AND (
     news.title LIKE '%running%' 
  OR news.body LIKE '%running%' 
  OR news.intro LIKE '%running%' 
)
ORDER BY created_on desc