Re: slow queries and blob fields
MySQL can only use 1 index in this scenario, it will have to choose 1 from active and news_date.
If you have a composite index on (active,news_date), then this is likely to remove the "using filesort"
As with Jay suggestion, if active has a low cardinality like 2, then you should not be indexing it, then it will be able to use the news_date index and this should be able remove the "using filesort" as well in this query.
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Re: slow queries and blob fields
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