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Strange behavior with a strange request
Posted by: Julien Palard
Date: December 08, 2011 05:03AM

Hi there !

Today, a dev in my company asked me about a strange behavior, but he doesn't noticied that its request were completely weird ... here it is, extremly simplified :

SELECT id FROM a_table
WHERE id > 0
AND id > 3

I can't understand how MySQL parses it cause I don't see any usage of AND after GROUP BY in the documentation ^-^

Strangely enouth, id > 0 (after the GROUP BY) there is only one result, and with an integer greater than 0, like "id > 2", there is two fields returned, the first, AND the first matching id > 2.

Any idea ? Is this a bug of a feature ? :-P

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Strange behavior with a strange request
December 08, 2011 05:03AM

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