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Re: Query taking a lot of time if there is no record in table
Posted by: Rick James
Date: April 30, 2009 11:31PM

I have encountered that problem with older versions of MySQL in InnoDB, but have not found whether or when it was fixed. What version are you using?

DATE(RATE_TIME) -- Do not take a function of an index column; it prevents using the index. In this case, the DATE() function is unnecessary; this should work fine:
... AND RATE_TIME = '2008-11-01'
and help it use the index.

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Query taking a lot of time if there is no record in table
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Aditi mittal
April 29, 2009 04:42AM
Re: Query taking a lot of time if there is no record in table
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Rick James
April 30, 2009 11:31PM
Re: Query taking a lot of time if there is no record in table
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Aditi mittal
May 04, 2009 01:30AM
Re: Query taking a lot of time if there is no record in table
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Rick James
May 04, 2009 07:19PM
Re: Query taking a lot of time if there is no record in table
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Aditi mittal
May 04, 2009 11:46PM


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