MySQL Integer vs DateTime index

Posted by David Kuridža on Stack Overflow See other posts from Stack Overflow or by David Kuridža
Published on 2011-01-04T13:40:16Z Indexed on 2011/01/04 15:54 UTC
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Filed under:

mysql

|

indexing

|

innodb

Let me start by saying I have looked at many similar questions asked, but all of them relate to Timestamp and DateTime field type without indexing. At least that is my understanding.

As we all know, there are certain advantages when it comes to DateTime. Putting them aside for a minute, and assuming table's engine is InnoDB with 10+ million records, which query would perform faster when criteria is based on:

DateTime with index

int with index

In other words, it is better to store date and time as DateTime or UNIX timestamp in int? Keep in mind there is no need for any built-in MySQL functions to be used.

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