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Re: Partition on day of year
Posted by: Rick James
Date: March 02, 2011 11:16AM

PARTITION or not, the performance will be about the same -- a range scan on some index starting with job_date_time. If you don't have it partitioned the same as the range, or you don't have an index starting with job_date_time, then the query will do a lot more than it has to.

Note: LIKE '%...%' cannot use any index. This is because of the leading wild card.

Consider FULLTEXT. Caveat: 'HP' is shorter than ft_min_word_len, so cannot be recognized via FULLTEXT.

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